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


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
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_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4218f83d8720e42f8aca95bc53f0e3596fa9d7dcb5b7fd0af0252eb620036e99
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-29 06:48:17,667 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-29 06:48:17,728 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-29 06:48:17,732 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-29 06:48:17,732 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-29 06:48:17,754 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-29 06:48:17,755 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-29 06:48:17,755 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-29 06:48:17,756 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-29 06:48:17,757 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-29 06:48:17,757 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-29 06:48:17,758 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-29 06:48:17,758 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-29 06:48:17,759 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-29 06:48:17,759 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-29 06:48:17,760 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-29 06:48:17,760 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-29 06:48:17,761 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-29 06:48:17,761 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-29 06:48:17,762 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-29 06:48:17,762 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-29 06:48:17,765 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-29 06:48:17,765 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-29 06:48:17,766 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-29 06:48:17,766 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-29 06:48:17,766 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-29 06:48:17,767 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-29 06:48:17,767 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-29 06:48:17,767 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 06:48:17,768 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-29 06:48:17,768 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-29 06:48:17,769 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-29 06:48:17,769 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-29 06:48:17,769 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-29 06:48:17,769 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-29 06:48:17,769 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-29 06:48:17,770 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-29 06:48:17,770 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-29 06:48:17,770 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-29 06:48:17,770 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_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/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_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4218f83d8720e42f8aca95bc53f0e3596fa9d7dcb5b7fd0af0252eb620036e99
[2023-11-29 06:48:18,005 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-29 06:48:18,024 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-29 06:48:18,027 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-29 06:48:18,028 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-29 06:48:18,029 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-29 06:48:18,030 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c
[2023-11-29 06:48:20,746 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-29 06:48:21,271 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-29 06:48:21,271 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c
[2023-11-29 06:48:21,322 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/data/2bce277c2/d865647a035c49b78ad8cb9fa0b595b1/FLAG68044da0b
[2023-11-29 06:48:21,333 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/data/2bce277c2/d865647a035c49b78ad8cb9fa0b595b1
[2023-11-29 06:48:21,336 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-29 06:48:21,337 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-29 06:48:21,338 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-29 06:48:21,339 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-29 06:48:21,343 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-29 06:48:21,343 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:48:21" (1/1) ...
[2023-11-29 06:48:21,344 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af5b10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:21, skipping insertion in model container
[2023-11-29 06:48:21,344 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:48:21" (1/1) ...
[2023-11-29 06:48:21,533 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-29 06:48:21,809 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_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c[1176,1189]
[2023-11-29 06:48:22,948 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 06:48:22,958 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-29 06:48:22,970 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_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c[1176,1189]
[2023-11-29 06:48:23,864 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 06:48:23,879 INFO  L206         MainTranslator]: Completed translation
[2023-11-29 06:48:23,879 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:23 WrapperNode
[2023-11-29 06:48:23,879 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-29 06:48:23,880 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-29 06:48:23,881 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-29 06:48:23,881 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-29 06:48:23,888 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:23" (1/1) ...
[2023-11-29 06:48:24,140 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:23" (1/1) ...
[2023-11-29 06:48:26,339 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 35529
[2023-11-29 06:48:26,340 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-29 06:48:26,340 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-29 06:48:26,340 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-29 06:48:26,341 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-29 06:48:26,349 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:23" (1/1) ...
[2023-11-29 06:48:26,349 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:23" (1/1) ...
[2023-11-29 06:48:26,974 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:23" (1/1) ...
[2023-11-29 06:48:27,329 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2023-11-29 06:48:27,329 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:23" (1/1) ...
[2023-11-29 06:48:27,329 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:23" (1/1) ...
[2023-11-29 06:48:27,869 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:23" (1/1) ...
[2023-11-29 06:48:27,950 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:23" (1/1) ...
[2023-11-29 06:48:28,050 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:23" (1/1) ...
[2023-11-29 06:48:28,127 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:23" (1/1) ...
[2023-11-29 06:48:28,509 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-29 06:48:28,510 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-29 06:48:28,510 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-29 06:48:28,510 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-29 06:48:28,511 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:23" (1/1) ...
[2023-11-29 06:48:28,515 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 06:48:28,524 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:48:28,540 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-29 06:48:28,543 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-29 06:48:28,571 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-29 06:48:28,571 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-29 06:48:28,571 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-29 06:48:28,571 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-29 06:48:30,413 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-29 06:48:30,415 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-29 06:48:45,148 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-29 06:48:45,761 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-29 06:48:45,761 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-29 06:48:45,764 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:48:45 BoogieIcfgContainer
[2023-11-29 06:48:45,764 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-29 06:48:45,767 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-29 06:48:45,767 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-29 06:48:45,773 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-29 06:48:45,773 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:48:21" (1/3) ...
[2023-11-29 06:48:45,774 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b0aa8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:48:45, skipping insertion in model container
[2023-11-29 06:48:45,774 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:23" (2/3) ...
[2023-11-29 06:48:45,775 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b0aa8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:48:45, skipping insertion in model container
[2023-11-29 06:48:45,775 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:48:45" (3/3) ...
[2023-11-29 06:48:45,776 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.rushhour.1.prop1-back-serstep.c
[2023-11-29 06:48:45,796 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-29 06:48:45,797 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-29 06:48:45,950 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-29 06:48:45,957 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=LoopHeads, 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;@1ca9dbd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-29 06:48:45,957 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-29 06:48:45,979 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 6170 states, 6168 states have (on average 1.6666666666666667) internal successors, (10280), 6169 states have internal predecessors, (10280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:48:46,011 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 431
[2023-11-29 06:48:46,012 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:48:46,013 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]
[2023-11-29 06:48:46,013 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:48:46,018 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:48:46,019 INFO  L85        PathProgramCache]: Analyzing trace with hash -1222883534, now seen corresponding path program 1 times
[2023-11-29 06:48:46,029 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:48:46,029 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304529288]
[2023-11-29 06:48:46,029 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:48:46,030 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:48:46,635 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:48:48,045 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:48:48,046 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:48:48,046 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304529288]
[2023-11-29 06:48:48,047 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304529288] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:48:48,047 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:48:48,047 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:48:48,048 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136895409]
[2023-11-29 06:48:48,049 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:48:48,054 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 06:48:48,055 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:48:48,080 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 06:48:48,080 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 06:48:48,094 INFO  L87              Difference]: Start difference. First operand  has 6170 states, 6168 states have (on average 1.6666666666666667) internal successors, (10280), 6169 states have internal predecessors, (10280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:48:48,429 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:48:48,430 INFO  L93              Difference]: Finished difference Result 12138 states and 20226 transitions.
[2023-11-29 06:48:48,431 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 06:48:48,432 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 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 430
[2023-11-29 06:48:48,435 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:48:48,473 INFO  L225             Difference]: With dead ends: 12138
[2023-11-29 06:48:48,473 INFO  L226             Difference]: Without dead ends: 6170
[2023-11-29 06:48:48,484 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
[2023-11-29 06:48:48,487 INFO  L413           NwaCegarLoop]: 10273 mSDtfsCounter, 1 mSDsluCounter, 20541 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30814 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:48:48,488 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30814 Invalid, 13 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:48:48,512 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6170 states.
[2023-11-29 06:48:48,622 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6170 to 6170.
[2023-11-29 06:48:48,634 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6170 states, 6169 states have (on average 1.6660722969687145) internal successors, (10278), 6169 states have internal predecessors, (10278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:48:48,651 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 10278 transitions.
[2023-11-29 06:48:48,653 INFO  L78                 Accepts]: Start accepts. Automaton has 6170 states and 10278 transitions. Word has length 430
[2023-11-29 06:48:48,654 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:48:48,654 INFO  L495      AbstractCegarLoop]: Abstraction has 6170 states and 10278 transitions.
[2023-11-29 06:48:48,655 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:48:48,655 INFO  L276                IsEmpty]: Start isEmpty. Operand 6170 states and 10278 transitions.
[2023-11-29 06:48:48,660 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 432
[2023-11-29 06:48:48,661 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:48:48,661 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:48:48,661 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-29 06:48:48,661 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:48:48,662 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:48:48,662 INFO  L85        PathProgramCache]: Analyzing trace with hash 747043614, now seen corresponding path program 1 times
[2023-11-29 06:48:48,662 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:48:48,663 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188119598]
[2023-11-29 06:48:48,663 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:48:48,663 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:48:48,896 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:48:49,796 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:48:49,797 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:48:49,797 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188119598]
[2023-11-29 06:48:49,797 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188119598] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:48:49,797 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:48:49,797 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:48:49,798 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035640727]
[2023-11-29 06:48:49,798 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:48:49,800 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 06:48:49,800 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:48:49,801 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 06:48:49,802 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 06:48:49,802 INFO  L87              Difference]: Start difference. First operand 6170 states and 10278 transitions. Second operand  has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:48:50,127 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:48:50,127 INFO  L93              Difference]: Finished difference Result 12141 states and 20224 transitions.
[2023-11-29 06:48:50,128 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 06:48:50,128 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 431
[2023-11-29 06:48:50,129 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:48:50,162 INFO  L225             Difference]: With dead ends: 12141
[2023-11-29 06:48:50,163 INFO  L226             Difference]: Without dead ends: 6173
[2023-11-29 06:48:50,170 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
[2023-11-29 06:48:50,172 INFO  L413           NwaCegarLoop]: 10273 mSDtfsCounter, 1 mSDsluCounter, 20539 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30812 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:48:50,172 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30812 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:48:50,185 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6173 states.
[2023-11-29 06:48:50,280 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6173 to 6172.
[2023-11-29 06:48:50,295 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6172 states, 6171 states have (on average 1.6658564252147139) internal successors, (10280), 6171 states have internal predecessors, (10280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:48:50,318 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6172 states to 6172 states and 10280 transitions.
[2023-11-29 06:48:50,318 INFO  L78                 Accepts]: Start accepts. Automaton has 6172 states and 10280 transitions. Word has length 431
[2023-11-29 06:48:50,319 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:48:50,319 INFO  L495      AbstractCegarLoop]: Abstraction has 6172 states and 10280 transitions.
[2023-11-29 06:48:50,319 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:48:50,320 INFO  L276                IsEmpty]: Start isEmpty. Operand 6172 states and 10280 transitions.
[2023-11-29 06:48:50,327 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 433
[2023-11-29 06:48:50,328 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:48:50,328 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:48:50,328 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-29 06:48:50,329 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:48:50,329 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:48:50,329 INFO  L85        PathProgramCache]: Analyzing trace with hash 1473085644, now seen corresponding path program 1 times
[2023-11-29 06:48:50,329 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:48:50,330 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445342009]
[2023-11-29 06:48:50,330 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:48:50,330 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:48:50,618 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:48:51,577 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:48:51,577 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:48:51,577 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445342009]
[2023-11-29 06:48:51,577 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445342009] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:48:51,578 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:48:51,578 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:48:51,578 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631213374]
[2023-11-29 06:48:51,578 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:48:51,579 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:48:51,579 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:48:51,580 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:48:51,581 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:48:51,581 INFO  L87              Difference]: Start difference. First operand 6172 states and 10280 transitions. Second operand  has 5 states, 5 states have (on average 86.4) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:48:52,182 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:48:52,182 INFO  L93              Difference]: Finished difference Result 18537 states and 30878 transitions.
[2023-11-29 06:48:52,183 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 06:48:52,184 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 86.4) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 432
[2023-11-29 06:48:52,185 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:48:52,250 INFO  L225             Difference]: With dead ends: 18537
[2023-11-29 06:48:52,250 INFO  L226             Difference]: Without dead ends: 12567
[2023-11-29 06:48:52,260 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-29 06:48:52,261 INFO  L413           NwaCegarLoop]: 10992 mSDtfsCounter, 40369 mSDsluCounter, 20540 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40369 SdHoareTripleChecker+Valid, 31532 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
[2023-11-29 06:48:52,262 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [40369 Valid, 31532 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:48:52,282 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12567 states.
[2023-11-29 06:48:52,428 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12567 to 6606.
[2023-11-29 06:48:52,440 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6606 states, 6605 states have (on average 1.6657077971233913) internal successors, (11002), 6605 states have internal predecessors, (11002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:48:52,461 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6606 states to 6606 states and 11002 transitions.
[2023-11-29 06:48:52,461 INFO  L78                 Accepts]: Start accepts. Automaton has 6606 states and 11002 transitions. Word has length 432
[2023-11-29 06:48:52,462 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:48:52,462 INFO  L495      AbstractCegarLoop]: Abstraction has 6606 states and 11002 transitions.
[2023-11-29 06:48:52,462 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 86.4) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:48:52,463 INFO  L276                IsEmpty]: Start isEmpty. Operand 6606 states and 11002 transitions.
[2023-11-29 06:48:52,774 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4410
[2023-11-29 06:48:52,774 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:48:52,776 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:48:52,777 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-29 06:48:52,777 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:48:52,777 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:48:52,779 INFO  L85        PathProgramCache]: Analyzing trace with hash -374405759, now seen corresponding path program 1 times
[2023-11-29 06:48:52,779 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:48:52,779 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459968595]
[2023-11-29 06:48:52,780 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:48:52,780 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:48:53,469 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:48:53,470 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617734622]
[2023-11-29 06:48:53,470 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:48:53,471 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:48:53,471 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:48:53,472 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:48:53,475 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-29 06:49:03,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:49:03,315 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36925 conjuncts, 23 conjunts are in the unsatisfiable core
[2023-11-29 06:49:03,463 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:49:04,124 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked.
[2023-11-29 06:49:04,124 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:49:04,124 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:49:04,125 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459968595]
[2023-11-29 06:49:04,125 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:49:04,125 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617734622]
[2023-11-29 06:49:04,125 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [617734622] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:49:04,125 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:49:04,127 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 06:49:04,127 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774681994]
[2023-11-29 06:49:04,127 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:49:04,133 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 06:49:04,133 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:49:04,138 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 06:49:04,138 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 06:49:04,140 INFO  L87              Difference]: Start difference. First operand 6606 states and 11002 transitions. Second operand  has 8 states, 8 states have (on average 515.25) internal successors, (4122), 8 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:49:04,919 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:49:04,919 INFO  L93              Difference]: Finished difference Result 18543 states and 30884 transitions.
[2023-11-29 06:49:04,920 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:49:04,922 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 515.25) internal successors, (4122), 8 states have internal predecessors, (4122), 0 states have call successors, (0), 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 4409
[2023-11-29 06:49:04,932 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:49:04,957 INFO  L225             Difference]: With dead ends: 18543
[2023-11-29 06:49:04,957 INFO  L226             Difference]: Without dead ends: 12573
[2023-11-29 06:49:04,966 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4418 GetRequests, 4405 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-29 06:49:04,967 INFO  L413           NwaCegarLoop]: 10990 mSDtfsCounter, 29290 mSDsluCounter, 53153 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29290 SdHoareTripleChecker+Valid, 64143 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-29 06:49:04,968 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29290 Valid, 64143 Invalid, 53 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-29 06:49:04,989 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12573 states.
[2023-11-29 06:49:05,128 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12573 to 6606.
[2023-11-29 06:49:05,137 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6606 states, 6605 states have (on average 1.6657077971233913) internal successors, (11002), 6605 states have internal predecessors, (11002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:49:05,149 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6606 states to 6606 states and 11002 transitions.
[2023-11-29 06:49:05,150 INFO  L78                 Accepts]: Start accepts. Automaton has 6606 states and 11002 transitions. Word has length 4409
[2023-11-29 06:49:05,157 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:49:05,157 INFO  L495      AbstractCegarLoop]: Abstraction has 6606 states and 11002 transitions.
[2023-11-29 06:49:05,159 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 515.25) internal successors, (4122), 8 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:49:05,159 INFO  L276                IsEmpty]: Start isEmpty. Operand 6606 states and 11002 transitions.
[2023-11-29 06:49:05,268 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4411
[2023-11-29 06:49:05,268 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:49:05,271 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:49:05,382 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-29 06:49:05,471 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:49:05,472 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:49:05,472 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:49:05,473 INFO  L85        PathProgramCache]: Analyzing trace with hash -1416734609, now seen corresponding path program 1 times
[2023-11-29 06:49:05,474 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:49:05,474 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136068510]
[2023-11-29 06:49:05,474 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:49:05,474 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:49:06,192 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:49:06,192 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979393611]
[2023-11-29 06:49:06,193 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:49:06,193 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:49:06,193 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:49:06,194 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:49:06,195 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-29 06:49:15,325 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:49:15,579 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36928 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:49:15,678 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:49:16,041 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked.
[2023-11-29 06:49:16,042 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:49:16,042 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:49:16,042 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136068510]
[2023-11-29 06:49:16,042 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:49:16,042 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979393611]
[2023-11-29 06:49:16,042 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [979393611] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:49:16,043 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:49:16,044 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:49:16,044 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518205119]
[2023-11-29 06:49:16,044 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:49:16,049 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:49:16,050 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:49:16,054 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:49:16,054 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:49:16,056 INFO  L87              Difference]: Start difference. First operand 6606 states and 11002 transitions. Second operand  has 7 states, 7 states have (on average 589.2857142857143) internal successors, (4125), 7 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:49:16,656 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:49:16,656 INFO  L93              Difference]: Finished difference Result 18545 states and 30886 transitions.
[2023-11-29 06:49:16,656 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:49:16,657 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 589.2857142857143) internal successors, (4125), 7 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4410
[2023-11-29 06:49:16,665 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:49:16,682 INFO  L225             Difference]: With dead ends: 18545
[2023-11-29 06:49:16,682 INFO  L226             Difference]: Without dead ends: 12572
[2023-11-29 06:49:16,688 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4419 GetRequests, 4407 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:49:16,688 INFO  L413           NwaCegarLoop]: 10985 mSDtfsCounter, 29289 mSDsluCounter, 43209 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29289 SdHoareTripleChecker+Valid, 54194 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:49:16,689 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29289 Valid, 54194 Invalid, 48 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:49:16,699 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12572 states.
[2023-11-29 06:49:16,772 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12572 to 6608.
[2023-11-29 06:49:16,779 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6608 states, 6607 states have (on average 1.6655062812168913) internal successors, (11004), 6607 states have internal predecessors, (11004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:49:16,787 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6608 states to 6608 states and 11004 transitions.
[2023-11-29 06:49:16,788 INFO  L78                 Accepts]: Start accepts. Automaton has 6608 states and 11004 transitions. Word has length 4410
[2023-11-29 06:49:16,792 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:49:16,792 INFO  L495      AbstractCegarLoop]: Abstraction has 6608 states and 11004 transitions.
[2023-11-29 06:49:16,793 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 589.2857142857143) internal successors, (4125), 7 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:49:16,793 INFO  L276                IsEmpty]: Start isEmpty. Operand 6608 states and 11004 transitions.
[2023-11-29 06:49:16,875 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4412
[2023-11-29 06:49:16,875 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:49:16,877 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:49:16,982 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-29 06:49:17,078 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:49:17,078 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:49:17,079 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:49:17,080 INFO  L85        PathProgramCache]: Analyzing trace with hash -44093219, now seen corresponding path program 1 times
[2023-11-29 06:49:17,081 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:49:17,081 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993100601]
[2023-11-29 06:49:17,081 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:49:17,082 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:49:17,658 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:49:17,658 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382029464]
[2023-11-29 06:49:17,660 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:49:17,660 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:49:17,660 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:49:17,661 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:49:17,662 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-29 06:49:26,707 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:49:26,935 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36932 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:49:27,017 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:49:27,331 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked.
[2023-11-29 06:49:27,331 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:49:27,331 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:49:27,331 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993100601]
[2023-11-29 06:49:27,331 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:49:27,331 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382029464]
[2023-11-29 06:49:27,332 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382029464] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:49:27,332 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:49:27,333 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:49:27,334 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947160251]
[2023-11-29 06:49:27,334 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:49:27,339 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:49:27,339 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:49:27,344 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:49:27,344 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:49:27,346 INFO  L87              Difference]: Start difference. First operand 6608 states and 11004 transitions. Second operand  has 7 states, 7 states have (on average 589.7142857142857) internal successors, (4128), 7 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:49:27,840 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:49:27,840 INFO  L93              Difference]: Finished difference Result 18551 states and 30892 transitions.
[2023-11-29 06:49:27,840 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:49:27,842 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 589.7142857142857) internal successors, (4128), 7 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4411
[2023-11-29 06:49:27,851 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:49:27,897 INFO  L225             Difference]: With dead ends: 18551
[2023-11-29 06:49:27,897 INFO  L226             Difference]: Without dead ends: 12573
[2023-11-29 06:49:27,906 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4420 GetRequests, 4408 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:49:27,907 INFO  L413           NwaCegarLoop]: 10980 mSDtfsCounter, 29288 mSDsluCounter, 43194 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29288 SdHoareTripleChecker+Valid, 54174 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:49:27,907 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29288 Valid, 54174 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:49:27,923 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12573 states.
[2023-11-29 06:49:28,032 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12573 to 6610.
[2023-11-29 06:49:28,042 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6610 states, 6609 states have (on average 1.665304887274928) internal successors, (11006), 6609 states have internal predecessors, (11006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:49:28,054 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6610 states to 6610 states and 11006 transitions.
[2023-11-29 06:49:28,054 INFO  L78                 Accepts]: Start accepts. Automaton has 6610 states and 11006 transitions. Word has length 4411
[2023-11-29 06:49:28,058 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:49:28,058 INFO  L495      AbstractCegarLoop]: Abstraction has 6610 states and 11006 transitions.
[2023-11-29 06:49:28,060 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 589.7142857142857) internal successors, (4128), 7 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:49:28,060 INFO  L276                IsEmpty]: Start isEmpty. Operand 6610 states and 11006 transitions.
[2023-11-29 06:49:28,197 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4413
[2023-11-29 06:49:28,197 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:49:28,200 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:49:28,334 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-29 06:49:28,402 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:49:28,402 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:49:28,403 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:49:28,404 INFO  L85        PathProgramCache]: Analyzing trace with hash 308024343, now seen corresponding path program 1 times
[2023-11-29 06:49:28,404 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:49:28,404 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274881711]
[2023-11-29 06:49:28,404 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:49:28,405 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:49:29,032 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:49:29,032 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535454791]
[2023-11-29 06:49:29,033 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:49:29,033 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:49:29,034 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:49:29,035 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:49:29,036 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-29 06:49:38,368 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:49:38,599 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36935 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:49:38,679 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:49:38,948 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked.
[2023-11-29 06:49:38,948 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:49:38,948 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:49:38,948 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274881711]
[2023-11-29 06:49:38,948 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:49:38,949 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535454791]
[2023-11-29 06:49:38,949 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [535454791] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:49:38,949 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:49:38,950 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:49:38,951 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743971216]
[2023-11-29 06:49:38,951 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:49:38,956 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:49:38,956 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:49:38,960 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:49:38,960 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:49:38,962 INFO  L87              Difference]: Start difference. First operand 6610 states and 11006 transitions. Second operand  has 7 states, 7 states have (on average 590.1428571428571) internal successors, (4131), 7 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:49:39,443 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:49:39,443 INFO  L93              Difference]: Finished difference Result 18557 states and 30898 transitions.
[2023-11-29 06:49:39,443 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:49:39,444 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 590.1428571428571) internal successors, (4131), 7 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4412
[2023-11-29 06:49:39,450 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:49:39,468 INFO  L225             Difference]: With dead ends: 18557
[2023-11-29 06:49:39,468 INFO  L226             Difference]: Without dead ends: 12574
[2023-11-29 06:49:39,477 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4421 GetRequests, 4409 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:49:39,478 INFO  L413           NwaCegarLoop]: 10975 mSDtfsCounter, 29287 mSDsluCounter, 43179 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29287 SdHoareTripleChecker+Valid, 54154 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:49:39,478 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29287 Valid, 54154 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:49:39,493 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12574 states.
[2023-11-29 06:49:39,602 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12574 to 6612.
[2023-11-29 06:49:39,611 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6612 states, 6611 states have (on average 1.66510361518681) internal successors, (11008), 6611 states have internal predecessors, (11008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:49:39,622 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 11008 transitions.
[2023-11-29 06:49:39,623 INFO  L78                 Accepts]: Start accepts. Automaton has 6612 states and 11008 transitions. Word has length 4412
[2023-11-29 06:49:39,626 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:49:39,626 INFO  L495      AbstractCegarLoop]: Abstraction has 6612 states and 11008 transitions.
[2023-11-29 06:49:39,628 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 590.1428571428571) internal successors, (4131), 7 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:49:39,628 INFO  L276                IsEmpty]: Start isEmpty. Operand 6612 states and 11008 transitions.
[2023-11-29 06:49:39,867 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4414
[2023-11-29 06:49:39,867 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:49:39,869 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:49:39,981 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-29 06:49:40,070 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:49:40,070 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:49:40,070 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:49:40,072 INFO  L85        PathProgramCache]: Analyzing trace with hash -882180809, now seen corresponding path program 1 times
[2023-11-29 06:49:40,072 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:49:40,072 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741799617]
[2023-11-29 06:49:40,072 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:49:40,073 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:49:40,605 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:49:40,605 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174456093]
[2023-11-29 06:49:40,606 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:49:40,606 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:49:40,606 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:49:40,607 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:49:40,608 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 06:49:49,813 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:49:50,053 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36938 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:49:50,163 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:49:50,407 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked.
[2023-11-29 06:49:50,407 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:49:50,407 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:49:50,407 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741799617]
[2023-11-29 06:49:50,407 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:49:50,407 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174456093]
[2023-11-29 06:49:50,408 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174456093] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:49:50,408 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:49:50,409 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:49:50,409 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410537790]
[2023-11-29 06:49:50,410 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:49:50,414 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:49:50,414 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:49:50,417 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:49:50,417 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:49:50,418 INFO  L87              Difference]: Start difference. First operand 6612 states and 11008 transitions. Second operand  has 7 states, 7 states have (on average 590.5714285714286) internal successors, (4134), 7 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:49:50,863 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:49:50,863 INFO  L93              Difference]: Finished difference Result 18563 states and 30904 transitions.
[2023-11-29 06:49:50,864 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:49:50,865 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 590.5714285714286) internal successors, (4134), 7 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4413
[2023-11-29 06:49:50,870 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:49:50,881 INFO  L225             Difference]: With dead ends: 18563
[2023-11-29 06:49:50,881 INFO  L226             Difference]: Without dead ends: 12575
[2023-11-29 06:49:50,889 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4422 GetRequests, 4410 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:49:50,889 INFO  L413           NwaCegarLoop]: 10970 mSDtfsCounter, 29286 mSDsluCounter, 43164 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29286 SdHoareTripleChecker+Valid, 54134 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:49:50,889 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29286 Valid, 54134 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:49:50,900 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12575 states.
[2023-11-29 06:49:50,972 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 6614.
[2023-11-29 06:49:50,979 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6614 states, 6613 states have (on average 1.664902464841978) internal successors, (11010), 6613 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)
[2023-11-29 06:49:50,990 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6614 states to 6614 states and 11010 transitions.
[2023-11-29 06:49:50,991 INFO  L78                 Accepts]: Start accepts. Automaton has 6614 states and 11010 transitions. Word has length 4413
[2023-11-29 06:49:50,995 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:49:50,995 INFO  L495      AbstractCegarLoop]: Abstraction has 6614 states and 11010 transitions.
[2023-11-29 06:49:50,996 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 590.5714285714286) internal successors, (4134), 7 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:49:50,996 INFO  L276                IsEmpty]: Start isEmpty. Operand 6614 states and 11010 transitions.
[2023-11-29 06:49:51,225 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4415
[2023-11-29 06:49:51,225 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:49:51,228 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:49:51,340 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-29 06:49:51,428 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:49:51,429 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:49:51,429 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:49:51,430 INFO  L85        PathProgramCache]: Analyzing trace with hash -379616067, now seen corresponding path program 1 times
[2023-11-29 06:49:51,430 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:49:51,430 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734059943]
[2023-11-29 06:49:51,431 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:49:51,431 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:49:51,958 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:49:51,959 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398100855]
[2023-11-29 06:49:51,959 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:49:51,959 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:49:51,960 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:49:51,960 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:49:51,962 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 06:50:01,585 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:50:01,833 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36941 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:50:01,913 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:50:02,152 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked.
[2023-11-29 06:50:02,152 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:50:02,152 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:50:02,152 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734059943]
[2023-11-29 06:50:02,152 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:50:02,152 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398100855]
[2023-11-29 06:50:02,152 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398100855] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:50:02,152 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:50:02,153 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:50:02,154 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202669977]
[2023-11-29 06:50:02,154 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:50:02,157 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:50:02,157 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:50:02,160 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:50:02,160 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:50:02,161 INFO  L87              Difference]: Start difference. First operand 6614 states and 11010 transitions. Second operand  has 7 states, 7 states have (on average 591.0) internal successors, (4137), 7 states have internal predecessors, (4137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:02,594 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:50:02,594 INFO  L93              Difference]: Finished difference Result 18569 states and 30910 transitions.
[2023-11-29 06:50:02,594 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:50:02,595 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 591.0) internal successors, (4137), 7 states have internal predecessors, (4137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4414
[2023-11-29 06:50:02,599 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:50:02,610 INFO  L225             Difference]: With dead ends: 18569
[2023-11-29 06:50:02,610 INFO  L226             Difference]: Without dead ends: 12576
[2023-11-29 06:50:02,619 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4423 GetRequests, 4411 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:50:02,620 INFO  L413           NwaCegarLoop]: 10965 mSDtfsCounter, 29285 mSDsluCounter, 43149 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29285 SdHoareTripleChecker+Valid, 54114 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:50:02,621 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29285 Valid, 54114 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:50:02,633 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12576 states.
[2023-11-29 06:50:02,715 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12576 to 6616.
[2023-11-29 06:50:02,721 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6616 states, 6615 states have (on average 1.6647014361300077) internal successors, (11012), 6615 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)
[2023-11-29 06:50:02,729 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6616 states to 6616 states and 11012 transitions.
[2023-11-29 06:50:02,729 INFO  L78                 Accepts]: Start accepts. Automaton has 6616 states and 11012 transitions. Word has length 4414
[2023-11-29 06:50:02,732 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:50:02,732 INFO  L495      AbstractCegarLoop]: Abstraction has 6616 states and 11012 transitions.
[2023-11-29 06:50:02,733 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 591.0) internal successors, (4137), 7 states have internal predecessors, (4137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:02,734 INFO  L276                IsEmpty]: Start isEmpty. Operand 6616 states and 11012 transitions.
[2023-11-29 06:50:02,906 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4416
[2023-11-29 06:50:02,906 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:50:02,909 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:50:03,024 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-29 06:50:03,109 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:50:03,110 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:50:03,110 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:50:03,111 INFO  L85        PathProgramCache]: Analyzing trace with hash 642658707, now seen corresponding path program 1 times
[2023-11-29 06:50:03,111 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:50:03,111 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750081175]
[2023-11-29 06:50:03,112 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:50:03,112 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:50:03,644 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:50:03,644 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760772267]
[2023-11-29 06:50:03,645 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:50:03,645 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:50:03,645 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:50:03,646 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:50:03,647 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 06:50:12,669 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:50:12,889 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36945 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:50:12,963 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:50:13,171 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked.
[2023-11-29 06:50:13,171 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:50:13,171 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:50:13,171 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750081175]
[2023-11-29 06:50:13,171 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:50:13,171 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760772267]
[2023-11-29 06:50:13,171 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760772267] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:50:13,171 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:50:13,173 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:50:13,173 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960154365]
[2023-11-29 06:50:13,173 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:50:13,178 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:50:13,178 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:50:13,182 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:50:13,182 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:50:13,183 INFO  L87              Difference]: Start difference. First operand 6616 states and 11012 transitions. Second operand  has 7 states, 7 states have (on average 591.4285714285714) internal successors, (4140), 7 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:13,594 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:50:13,594 INFO  L93              Difference]: Finished difference Result 18575 states and 30916 transitions.
[2023-11-29 06:50:13,595 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:50:13,596 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 591.4285714285714) internal successors, (4140), 7 states have internal predecessors, (4140), 0 states have call successors, (0), 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 4415
[2023-11-29 06:50:13,601 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:50:13,611 INFO  L225             Difference]: With dead ends: 18575
[2023-11-29 06:50:13,611 INFO  L226             Difference]: Without dead ends: 12577
[2023-11-29 06:50:13,616 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4424 GetRequests, 4412 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:50:13,617 INFO  L413           NwaCegarLoop]: 10960 mSDtfsCounter, 29284 mSDsluCounter, 43134 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29284 SdHoareTripleChecker+Valid, 54094 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:50:13,617 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29284 Valid, 54094 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:50:13,627 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12577 states.
[2023-11-29 06:50:13,702 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12577 to 6618.
[2023-11-29 06:50:13,707 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6618 states, 6617 states have (on average 1.6645005289406076) internal successors, (11014), 6617 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)
[2023-11-29 06:50:13,714 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6618 states to 6618 states and 11014 transitions.
[2023-11-29 06:50:13,714 INFO  L78                 Accepts]: Start accepts. Automaton has 6618 states and 11014 transitions. Word has length 4415
[2023-11-29 06:50:13,717 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:50:13,717 INFO  L495      AbstractCegarLoop]: Abstraction has 6618 states and 11014 transitions.
[2023-11-29 06:50:13,718 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 591.4285714285714) internal successors, (4140), 7 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:13,718 INFO  L276                IsEmpty]: Start isEmpty. Operand 6618 states and 11014 transitions.
[2023-11-29 06:50:13,797 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4417
[2023-11-29 06:50:13,797 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:50:13,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:50:13,903 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-29 06:50:14,000 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:50:14,000 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:50:14,000 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:50:14,002 INFO  L85        PathProgramCache]: Analyzing trace with hash -351653531, now seen corresponding path program 1 times
[2023-11-29 06:50:14,002 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:50:14,002 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350642878]
[2023-11-29 06:50:14,003 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:50:14,003 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:50:14,611 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:50:14,611 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777858389]
[2023-11-29 06:50:14,612 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:50:14,612 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:50:14,612 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:50:14,613 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:50:14,615 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 06:50:23,573 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:50:23,810 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36948 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 06:50:23,892 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:50:24,102 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked.
[2023-11-29 06:50:24,102 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:50:24,102 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:50:24,102 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350642878]
[2023-11-29 06:50:24,102 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:50:24,102 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777858389]
[2023-11-29 06:50:24,102 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777858389] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:50:24,102 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:50:24,104 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 06:50:24,104 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036650336]
[2023-11-29 06:50:24,104 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:50:24,107 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 06:50:24,107 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:50:24,110 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 06:50:24,110 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 06:50:24,111 INFO  L87              Difference]: Start difference. First operand 6618 states and 11014 transitions. Second operand  has 8 states, 8 states have (on average 517.875) internal successors, (4143), 8 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:24,579 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:50:24,579 INFO  L93              Difference]: Finished difference Result 18581 states and 30922 transitions.
[2023-11-29 06:50:24,580 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:50:24,580 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 517.875) internal successors, (4143), 8 states have internal predecessors, (4143), 0 states have call successors, (0), 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 4416
[2023-11-29 06:50:24,584 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:50:24,592 INFO  L225             Difference]: With dead ends: 18581
[2023-11-29 06:50:24,592 INFO  L226             Difference]: Without dead ends: 12578
[2023-11-29 06:50:24,598 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4425 GetRequests, 4412 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-29 06:50:24,598 INFO  L413           NwaCegarLoop]: 10955 mSDtfsCounter, 29283 mSDsluCounter, 53026 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29283 SdHoareTripleChecker+Valid, 63981 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:50:24,599 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29283 Valid, 63981 Invalid, 54 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:50:24,611 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12578 states.
[2023-11-29 06:50:24,692 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12578 to 6620.
[2023-11-29 06:50:24,697 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6620 states, 6619 states have (on average 1.66429974316362) internal successors, (11016), 6619 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)
[2023-11-29 06:50:24,705 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 11016 transitions.
[2023-11-29 06:50:24,705 INFO  L78                 Accepts]: Start accepts. Automaton has 6620 states and 11016 transitions. Word has length 4416
[2023-11-29 06:50:24,707 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:50:24,708 INFO  L495      AbstractCegarLoop]: Abstraction has 6620 states and 11016 transitions.
[2023-11-29 06:50:24,709 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 517.875) internal successors, (4143), 8 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:24,709 INFO  L276                IsEmpty]: Start isEmpty. Operand 6620 states and 11016 transitions.
[2023-11-29 06:50:24,790 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4418
[2023-11-29 06:50:24,790 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:50:24,792 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:50:24,913 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-29 06:50:24,994 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:50:24,994 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:50:24,995 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:50:24,996 INFO  L85        PathProgramCache]: Analyzing trace with hash -1466123795, now seen corresponding path program 1 times
[2023-11-29 06:50:24,997 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:50:24,997 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11422499]
[2023-11-29 06:50:24,998 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:50:24,998 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:50:25,620 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:50:25,621 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906347284]
[2023-11-29 06:50:25,621 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:50:25,621 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:50:25,622 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:50:25,622 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:50:25,624 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 06:50:34,738 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:50:34,987 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36951 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:50:35,068 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:50:35,277 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked.
[2023-11-29 06:50:35,278 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:50:35,278 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:50:35,278 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11422499]
[2023-11-29 06:50:35,278 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:50:35,278 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906347284]
[2023-11-29 06:50:35,278 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906347284] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:50:35,278 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:50:35,280 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:50:35,280 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687586613]
[2023-11-29 06:50:35,280 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:50:35,285 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:50:35,285 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:50:35,289 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:50:35,289 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:50:35,290 INFO  L87              Difference]: Start difference. First operand 6620 states and 11016 transitions. Second operand  has 7 states, 7 states have (on average 592.2857142857143) internal successors, (4146), 7 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:35,859 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:50:35,859 INFO  L93              Difference]: Finished difference Result 18587 states and 30928 transitions.
[2023-11-29 06:50:35,859 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:50:35,860 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 592.2857142857143) internal successors, (4146), 7 states have internal predecessors, (4146), 0 states have call successors, (0), 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 4417
[2023-11-29 06:50:35,863 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:50:35,871 INFO  L225             Difference]: With dead ends: 18587
[2023-11-29 06:50:35,871 INFO  L226             Difference]: Without dead ends: 12579
[2023-11-29 06:50:35,875 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4426 GetRequests, 4414 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:50:35,876 INFO  L413           NwaCegarLoop]: 10950 mSDtfsCounter, 29282 mSDsluCounter, 43104 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29282 SdHoareTripleChecker+Valid, 54054 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:50:35,876 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29282 Valid, 54054 Invalid, 48 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:50:35,885 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12579 states.
[2023-11-29 06:50:35,943 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12579 to 6622.
[2023-11-29 06:50:35,949 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6622 states, 6621 states have (on average 1.6640990786890197) internal successors, (11018), 6621 states have internal predecessors, (11018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:35,956 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6622 states to 6622 states and 11018 transitions.
[2023-11-29 06:50:35,956 INFO  L78                 Accepts]: Start accepts. Automaton has 6622 states and 11018 transitions. Word has length 4417
[2023-11-29 06:50:35,958 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:50:35,958 INFO  L495      AbstractCegarLoop]: Abstraction has 6622 states and 11018 transitions.
[2023-11-29 06:50:35,959 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 592.2857142857143) internal successors, (4146), 7 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:35,959 INFO  L276                IsEmpty]: Start isEmpty. Operand 6622 states and 11018 transitions.
[2023-11-29 06:50:36,037 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4419
[2023-11-29 06:50:36,037 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:50:36,039 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:50:36,155 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-29 06:50:36,240 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-29 06:50:36,240 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:50:36,240 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:50:36,242 INFO  L85        PathProgramCache]: Analyzing trace with hash 1483064843, now seen corresponding path program 1 times
[2023-11-29 06:50:36,242 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:50:36,242 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438690069]
[2023-11-29 06:50:36,242 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:50:36,242 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:50:36,761 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:50:36,761 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060436761]
[2023-11-29 06:50:36,762 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:50:36,762 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:50:36,762 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:50:36,763 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:50:36,765 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 06:50:45,730 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:50:45,969 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36954 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:50:46,048 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:50:46,264 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked.
[2023-11-29 06:50:46,264 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:50:46,264 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:50:46,264 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438690069]
[2023-11-29 06:50:46,264 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:50:46,264 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060436761]
[2023-11-29 06:50:46,264 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060436761] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:50:46,264 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:50:46,266 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:50:46,266 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770819377]
[2023-11-29 06:50:46,266 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:50:46,269 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:50:46,269 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:50:46,272 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:50:46,272 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:50:46,272 INFO  L87              Difference]: Start difference. First operand 6622 states and 11018 transitions. Second operand  has 7 states, 7 states have (on average 592.7142857142857) internal successors, (4149), 7 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:46,693 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:50:46,694 INFO  L93              Difference]: Finished difference Result 18593 states and 30934 transitions.
[2023-11-29 06:50:46,694 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:50:46,695 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 592.7142857142857) internal successors, (4149), 7 states have internal predecessors, (4149), 0 states have call successors, (0), 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 4418
[2023-11-29 06:50:46,698 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:50:46,706 INFO  L225             Difference]: With dead ends: 18593
[2023-11-29 06:50:46,707 INFO  L226             Difference]: Without dead ends: 12580
[2023-11-29 06:50:46,711 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4427 GetRequests, 4415 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:50:46,711 INFO  L413           NwaCegarLoop]: 10945 mSDtfsCounter, 29281 mSDsluCounter, 43089 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29281 SdHoareTripleChecker+Valid, 54034 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:50:46,711 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29281 Valid, 54034 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:50:46,720 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12580 states.
[2023-11-29 06:50:46,782 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12580 to 6624.
[2023-11-29 06:50:46,788 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6624 states, 6623 states have (on average 1.6638985354069153) internal successors, (11020), 6623 states have internal predecessors, (11020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:46,798 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 11020 transitions.
[2023-11-29 06:50:46,798 INFO  L78                 Accepts]: Start accepts. Automaton has 6624 states and 11020 transitions. Word has length 4418
[2023-11-29 06:50:46,801 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:50:46,801 INFO  L495      AbstractCegarLoop]: Abstraction has 6624 states and 11020 transitions.
[2023-11-29 06:50:46,802 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 592.7142857142857) internal successors, (4149), 7 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:46,802 INFO  L276                IsEmpty]: Start isEmpty. Operand 6624 states and 11020 transitions.
[2023-11-29 06:50:46,933 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4420
[2023-11-29 06:50:46,934 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:50:46,936 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:50:47,040 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-29 06:50:47,136 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-29 06:50:47,137 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:50:47,137 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:50:47,139 INFO  L85        PathProgramCache]: Analyzing trace with hash -174327991, now seen corresponding path program 1 times
[2023-11-29 06:50:47,139 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:50:47,139 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356127468]
[2023-11-29 06:50:47,139 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:50:47,139 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:50:47,639 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:50:47,639 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342781514]
[2023-11-29 06:50:47,640 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:50:47,640 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:50:47,640 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:50:47,641 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:50:47,642 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 06:50:56,513 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:50:56,746 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36958 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:50:56,823 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:50:57,031 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked.
[2023-11-29 06:50:57,031 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:50:57,031 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:50:57,031 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356127468]
[2023-11-29 06:50:57,031 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:50:57,032 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342781514]
[2023-11-29 06:50:57,032 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [342781514] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:50:57,032 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:50:57,033 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:50:57,033 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925375538]
[2023-11-29 06:50:57,033 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:50:57,038 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:50:57,038 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:50:57,042 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:50:57,042 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:50:57,043 INFO  L87              Difference]: Start difference. First operand 6624 states and 11020 transitions. Second operand  has 7 states, 7 states have (on average 593.1428571428571) internal successors, (4152), 7 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:57,469 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:50:57,470 INFO  L93              Difference]: Finished difference Result 18599 states and 30940 transitions.
[2023-11-29 06:50:57,470 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:50:57,471 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 593.1428571428571) internal successors, (4152), 7 states have internal predecessors, (4152), 0 states have call successors, (0), 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 4419
[2023-11-29 06:50:57,474 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:50:57,482 INFO  L225             Difference]: With dead ends: 18599
[2023-11-29 06:50:57,483 INFO  L226             Difference]: Without dead ends: 12581
[2023-11-29 06:50:57,488 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4428 GetRequests, 4416 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:50:57,488 INFO  L413           NwaCegarLoop]: 10940 mSDtfsCounter, 29280 mSDsluCounter, 43074 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29280 SdHoareTripleChecker+Valid, 54014 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:50:57,488 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29280 Valid, 54014 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:50:57,500 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12581 states.
[2023-11-29 06:50:57,565 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12581 to 6626.
[2023-11-29 06:50:57,571 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6626 states, 6625 states have (on average 1.6636981132075472) internal successors, (11022), 6625 states have internal predecessors, (11022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:57,578 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6626 states to 6626 states and 11022 transitions.
[2023-11-29 06:50:57,578 INFO  L78                 Accepts]: Start accepts. Automaton has 6626 states and 11022 transitions. Word has length 4419
[2023-11-29 06:50:57,580 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:50:57,581 INFO  L495      AbstractCegarLoop]: Abstraction has 6626 states and 11022 transitions.
[2023-11-29 06:50:57,582 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 593.1428571428571) internal successors, (4152), 7 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:50:57,582 INFO  L276                IsEmpty]: Start isEmpty. Operand 6626 states and 11022 transitions.
[2023-11-29 06:50:57,812 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4421
[2023-11-29 06:50:57,812 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:50:57,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:50:57,923 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-29 06:50:58,014 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-29 06:50:58,014 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:50:58,015 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:50:58,016 INFO  L85        PathProgramCache]: Analyzing trace with hash 632120243, now seen corresponding path program 1 times
[2023-11-29 06:50:58,016 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:50:58,016 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300274108]
[2023-11-29 06:50:58,017 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:50:58,017 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:50:58,532 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:50:58,532 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330230097]
[2023-11-29 06:50:58,533 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:50:58,533 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:50:58,533 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:50:58,534 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:50:58,536 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 06:51:07,670 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:51:07,909 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36961 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:51:07,987 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:51:08,198 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked.
[2023-11-29 06:51:08,198 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:51:08,198 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:51:08,199 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300274108]
[2023-11-29 06:51:08,199 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:51:08,199 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330230097]
[2023-11-29 06:51:08,199 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [330230097] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:51:08,199 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:51:08,200 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:51:08,200 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133281330]
[2023-11-29 06:51:08,201 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:51:08,204 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:51:08,204 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:51:08,208 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:51:08,208 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:51:08,209 INFO  L87              Difference]: Start difference. First operand 6626 states and 11022 transitions. Second operand  has 7 states, 7 states have (on average 593.5714285714286) internal successors, (4155), 7 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:08,738 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:51:08,738 INFO  L93              Difference]: Finished difference Result 18605 states and 30946 transitions.
[2023-11-29 06:51:08,739 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:51:08,740 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 593.5714285714286) internal successors, (4155), 7 states have internal predecessors, (4155), 0 states have call successors, (0), 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 4420
[2023-11-29 06:51:08,744 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:51:08,755 INFO  L225             Difference]: With dead ends: 18605
[2023-11-29 06:51:08,755 INFO  L226             Difference]: Without dead ends: 12582
[2023-11-29 06:51:08,760 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4429 GetRequests, 4417 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:51:08,761 INFO  L413           NwaCegarLoop]: 10935 mSDtfsCounter, 29279 mSDsluCounter, 43059 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29279 SdHoareTripleChecker+Valid, 53994 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:51:08,761 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29279 Valid, 53994 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:51:08,773 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12582 states.
[2023-11-29 06:51:08,855 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12582 to 6628.
[2023-11-29 06:51:08,861 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6628 states, 6627 states have (on average 1.6634978119812887) internal successors, (11024), 6627 states have internal predecessors, (11024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:08,871 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6628 states to 6628 states and 11024 transitions.
[2023-11-29 06:51:08,871 INFO  L78                 Accepts]: Start accepts. Automaton has 6628 states and 11024 transitions. Word has length 4420
[2023-11-29 06:51:08,874 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:51:08,874 INFO  L495      AbstractCegarLoop]: Abstraction has 6628 states and 11024 transitions.
[2023-11-29 06:51:08,875 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 593.5714285714286) internal successors, (4155), 7 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:08,876 INFO  L276                IsEmpty]: Start isEmpty. Operand 6628 states and 11024 transitions.
[2023-11-29 06:51:09,064 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4422
[2023-11-29 06:51:09,064 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:51:09,066 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:51:09,171 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2023-11-29 06:51:09,266 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-29 06:51:09,267 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:51:09,267 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:51:09,269 INFO  L85        PathProgramCache]: Analyzing trace with hash 75611043, now seen corresponding path program 1 times
[2023-11-29 06:51:09,269 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:51:09,269 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109996009]
[2023-11-29 06:51:09,270 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:51:09,270 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:51:09,980 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:51:09,981 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573512610]
[2023-11-29 06:51:09,982 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:51:09,982 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:51:09,982 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:51:09,983 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:51:09,984 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 06:51:19,509 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:51:19,755 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36964 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:51:19,861 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:51:20,161 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked.
[2023-11-29 06:51:20,161 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:51:20,161 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:51:20,161 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109996009]
[2023-11-29 06:51:20,161 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:51:20,161 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573512610]
[2023-11-29 06:51:20,161 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [573512610] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:51:20,161 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:51:20,163 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:51:20,163 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363220890]
[2023-11-29 06:51:20,163 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:51:20,167 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:51:20,167 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:51:20,171 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:51:20,171 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:51:20,173 INFO  L87              Difference]: Start difference. First operand 6628 states and 11024 transitions. Second operand  has 7 states, 7 states have (on average 594.0) internal successors, (4158), 7 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:20,744 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:51:20,744 INFO  L93              Difference]: Finished difference Result 18611 states and 30952 transitions.
[2023-11-29 06:51:20,745 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:51:20,746 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 594.0) internal successors, (4158), 7 states have internal predecessors, (4158), 0 states have call successors, (0), 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 4421
[2023-11-29 06:51:20,750 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:51:20,761 INFO  L225             Difference]: With dead ends: 18611
[2023-11-29 06:51:20,761 INFO  L226             Difference]: Without dead ends: 12583
[2023-11-29 06:51:20,766 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4430 GetRequests, 4418 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:51:20,767 INFO  L413           NwaCegarLoop]: 10930 mSDtfsCounter, 29278 mSDsluCounter, 43044 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29278 SdHoareTripleChecker+Valid, 53974 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:51:20,767 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29278 Valid, 53974 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:51:20,779 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12583 states.
[2023-11-29 06:51:20,857 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12583 to 6630.
[2023-11-29 06:51:20,862 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6630 states, 6629 states have (on average 1.6632976316186454) internal successors, (11026), 6629 states have internal predecessors, (11026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:20,871 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6630 states to 6630 states and 11026 transitions.
[2023-11-29 06:51:20,871 INFO  L78                 Accepts]: Start accepts. Automaton has 6630 states and 11026 transitions. Word has length 4421
[2023-11-29 06:51:20,874 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:51:20,874 INFO  L495      AbstractCegarLoop]: Abstraction has 6630 states and 11026 transitions.
[2023-11-29 06:51:20,875 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 594.0) internal successors, (4158), 7 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:20,875 INFO  L276                IsEmpty]: Start isEmpty. Operand 6630 states and 11026 transitions.
[2023-11-29 06:51:21,179 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4423
[2023-11-29 06:51:21,180 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:51:21,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:51:21,289 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-29 06:51:21,382 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-29 06:51:21,382 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:51:21,383 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:51:21,384 INFO  L85        PathProgramCache]: Analyzing trace with hash 831298649, now seen corresponding path program 1 times
[2023-11-29 06:51:21,384 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:51:21,384 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699632135]
[2023-11-29 06:51:21,384 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:51:21,384 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:51:21,895 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:51:21,895 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179589242]
[2023-11-29 06:51:21,896 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:51:21,896 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:51:21,896 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:51:21,897 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:51:21,898 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 06:51:30,587 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:51:30,819 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36967 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:51:30,897 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:51:31,109 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked.
[2023-11-29 06:51:31,109 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:51:31,109 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:51:31,109 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699632135]
[2023-11-29 06:51:31,109 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:51:31,110 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179589242]
[2023-11-29 06:51:31,110 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179589242] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:51:31,110 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:51:31,111 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:51:31,112 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264119592]
[2023-11-29 06:51:31,112 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:51:31,115 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:51:31,115 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:51:31,118 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:51:31,118 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:51:31,120 INFO  L87              Difference]: Start difference. First operand 6630 states and 11026 transitions. Second operand  has 7 states, 7 states have (on average 594.4285714285714) internal successors, (4161), 7 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:31,663 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:51:31,663 INFO  L93              Difference]: Finished difference Result 18617 states and 30958 transitions.
[2023-11-29 06:51:31,663 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:51:31,664 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 594.4285714285714) internal successors, (4161), 7 states have internal predecessors, (4161), 0 states have call successors, (0), 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 4422
[2023-11-29 06:51:31,667 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:51:31,675 INFO  L225             Difference]: With dead ends: 18617
[2023-11-29 06:51:31,675 INFO  L226             Difference]: Without dead ends: 12584
[2023-11-29 06:51:31,679 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4431 GetRequests, 4419 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:51:31,679 INFO  L413           NwaCegarLoop]: 10925 mSDtfsCounter, 29277 mSDsluCounter, 43029 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29277 SdHoareTripleChecker+Valid, 53954 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:51:31,680 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29277 Valid, 53954 Invalid, 48 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:51:31,692 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12584 states.
[2023-11-29 06:51:31,765 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12584 to 6632.
[2023-11-29 06:51:31,770 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6632 states, 6631 states have (on average 1.6630975720102548) internal successors, (11028), 6631 states have internal predecessors, (11028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:31,776 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6632 states to 6632 states and 11028 transitions.
[2023-11-29 06:51:31,777 INFO  L78                 Accepts]: Start accepts. Automaton has 6632 states and 11028 transitions. Word has length 4422
[2023-11-29 06:51:31,779 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:51:31,779 INFO  L495      AbstractCegarLoop]: Abstraction has 6632 states and 11028 transitions.
[2023-11-29 06:51:31,779 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 594.4285714285714) internal successors, (4161), 7 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:31,779 INFO  L276                IsEmpty]: Start isEmpty. Operand 6632 states and 11028 transitions.
[2023-11-29 06:51:31,854 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4424
[2023-11-29 06:51:31,854 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:51:31,855 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:51:31,956 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-29 06:51:32,055 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-29 06:51:32,056 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:51:32,056 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:51:32,056 INFO  L85        PathProgramCache]: Analyzing trace with hash 499515903, now seen corresponding path program 1 times
[2023-11-29 06:51:32,056 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:51:32,057 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542701711]
[2023-11-29 06:51:32,057 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:51:32,057 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:51:32,568 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:51:32,568 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573057941]
[2023-11-29 06:51:32,569 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:51:32,569 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:51:32,570 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:51:32,570 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:51:32,572 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-29 06:51:41,447 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:51:41,670 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36971 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:51:41,739 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:51:41,942 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked.
[2023-11-29 06:51:41,942 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:51:41,942 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:51:41,942 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542701711]
[2023-11-29 06:51:41,942 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:51:41,942 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573057941]
[2023-11-29 06:51:41,942 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [573057941] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:51:41,942 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:51:41,944 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:51:41,944 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746189599]
[2023-11-29 06:51:41,944 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:51:41,947 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:51:41,947 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:51:41,950 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:51:41,950 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:51:41,951 INFO  L87              Difference]: Start difference. First operand 6632 states and 11028 transitions. Second operand  has 7 states, 7 states have (on average 594.8571428571429) internal successors, (4164), 7 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:42,369 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:51:42,369 INFO  L93              Difference]: Finished difference Result 18623 states and 30964 transitions.
[2023-11-29 06:51:42,369 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:51:42,370 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 594.8571428571429) internal successors, (4164), 7 states have internal predecessors, (4164), 0 states have call successors, (0), 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 4423
[2023-11-29 06:51:42,374 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:51:42,382 INFO  L225             Difference]: With dead ends: 18623
[2023-11-29 06:51:42,382 INFO  L226             Difference]: Without dead ends: 12585
[2023-11-29 06:51:42,387 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4432 GetRequests, 4420 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:51:42,387 INFO  L413           NwaCegarLoop]: 10920 mSDtfsCounter, 29276 mSDsluCounter, 43014 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29276 SdHoareTripleChecker+Valid, 53934 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:51:42,387 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29276 Valid, 53934 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:51:42,397 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12585 states.
[2023-11-29 06:51:42,454 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12585 to 6634.
[2023-11-29 06:51:42,460 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6634 states, 6633 states have (on average 1.6628976330468868) internal successors, (11030), 6633 states have internal predecessors, (11030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:42,466 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6634 states to 6634 states and 11030 transitions.
[2023-11-29 06:51:42,467 INFO  L78                 Accepts]: Start accepts. Automaton has 6634 states and 11030 transitions. Word has length 4423
[2023-11-29 06:51:42,469 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:51:42,469 INFO  L495      AbstractCegarLoop]: Abstraction has 6634 states and 11030 transitions.
[2023-11-29 06:51:42,469 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 594.8571428571429) internal successors, (4164), 7 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:42,470 INFO  L276                IsEmpty]: Start isEmpty. Operand 6634 states and 11030 transitions.
[2023-11-29 06:51:42,544 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4425
[2023-11-29 06:51:42,545 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:51:42,546 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:51:42,651 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-29 06:51:42,746 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-29 06:51:42,747 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:51:42,747 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:51:42,749 INFO  L85        PathProgramCache]: Analyzing trace with hash 779168513, now seen corresponding path program 1 times
[2023-11-29 06:51:42,749 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:51:42,749 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175274625]
[2023-11-29 06:51:42,749 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:51:42,749 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:51:43,245 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:51:43,245 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930297001]
[2023-11-29 06:51:43,246 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:51:43,246 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:51:43,246 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:51:43,247 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:51:43,248 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-29 06:51:52,191 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:51:52,423 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36974 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 06:51:52,493 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:51:52,706 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked.
[2023-11-29 06:51:52,706 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:51:52,706 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:51:52,706 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175274625]
[2023-11-29 06:51:52,706 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:51:52,707 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930297001]
[2023-11-29 06:51:52,707 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930297001] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:51:52,707 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:51:52,708 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 06:51:52,708 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980626154]
[2023-11-29 06:51:52,708 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:51:52,710 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 06:51:52,710 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:51:52,714 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 06:51:52,714 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 06:51:52,715 INFO  L87              Difference]: Start difference. First operand 6634 states and 11030 transitions. Second operand  has 8 states, 8 states have (on average 520.875) internal successors, (4167), 8 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:53,190 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:51:53,190 INFO  L93              Difference]: Finished difference Result 18629 states and 30970 transitions.
[2023-11-29 06:51:53,190 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:51:53,191 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 520.875) internal successors, (4167), 8 states have internal predecessors, (4167), 0 states have call successors, (0), 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 4424
[2023-11-29 06:51:53,194 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:51:53,203 INFO  L225             Difference]: With dead ends: 18629
[2023-11-29 06:51:53,203 INFO  L226             Difference]: Without dead ends: 12586
[2023-11-29 06:51:53,207 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4433 GetRequests, 4420 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-29 06:51:53,208 INFO  L413           NwaCegarLoop]: 10915 mSDtfsCounter, 29275 mSDsluCounter, 53911 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29275 SdHoareTripleChecker+Valid, 64826 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:51:53,208 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29275 Valid, 64826 Invalid, 59 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:51:53,218 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12586 states.
[2023-11-29 06:51:53,272 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12586 to 6636.
[2023-11-29 06:51:53,277 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6636 states, 6635 states have (on average 1.6626978146194424) internal successors, (11032), 6635 states have internal predecessors, (11032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:53,285 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6636 states to 6636 states and 11032 transitions.
[2023-11-29 06:51:53,285 INFO  L78                 Accepts]: Start accepts. Automaton has 6636 states and 11032 transitions. Word has length 4424
[2023-11-29 06:51:53,287 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:51:53,287 INFO  L495      AbstractCegarLoop]: Abstraction has 6636 states and 11032 transitions.
[2023-11-29 06:51:53,288 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 520.875) internal successors, (4167), 8 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:51:53,288 INFO  L276                IsEmpty]: Start isEmpty. Operand 6636 states and 11032 transitions.
[2023-11-29 06:51:53,365 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4426
[2023-11-29 06:51:53,365 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:51:53,366 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:51:53,470 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-29 06:51:53,567 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:51:53,567 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:51:53,567 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:51:53,568 INFO  L85        PathProgramCache]: Analyzing trace with hash 1268220505, now seen corresponding path program 1 times
[2023-11-29 06:51:53,568 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:51:53,568 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833935425]
[2023-11-29 06:51:53,569 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:51:53,569 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:51:54,150 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:51:54,150 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572208937]
[2023-11-29 06:51:54,151 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:51:54,151 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:51:54,151 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:51:54,152 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:51:54,153 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-29 06:52:02,810 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:52:03,039 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36977 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:52:03,109 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:52:03,311 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked.
[2023-11-29 06:52:03,311 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:52:03,311 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:52:03,312 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833935425]
[2023-11-29 06:52:03,312 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:52:03,312 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572208937]
[2023-11-29 06:52:03,312 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572208937] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:52:03,312 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:52:03,313 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:52:03,313 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563659306]
[2023-11-29 06:52:03,313 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:52:03,315 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:52:03,315 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:52:03,317 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:52:03,317 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:52:03,318 INFO  L87              Difference]: Start difference. First operand 6636 states and 11032 transitions. Second operand  has 7 states, 7 states have (on average 595.7142857142857) internal successors, (4170), 7 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:03,740 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:52:03,740 INFO  L93              Difference]: Finished difference Result 18635 states and 30976 transitions.
[2023-11-29 06:52:03,741 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:52:03,742 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 595.7142857142857) internal successors, (4170), 7 states have internal predecessors, (4170), 0 states have call successors, (0), 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 4425
[2023-11-29 06:52:03,745 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:52:03,754 INFO  L225             Difference]: With dead ends: 18635
[2023-11-29 06:52:03,754 INFO  L226             Difference]: Without dead ends: 12587
[2023-11-29 06:52:03,758 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4434 GetRequests, 4422 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:52:03,759 INFO  L413           NwaCegarLoop]: 10910 mSDtfsCounter, 29274 mSDsluCounter, 42984 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29274 SdHoareTripleChecker+Valid, 53894 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:52:03,759 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29274 Valid, 53894 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:52:03,768 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12587 states.
[2023-11-29 06:52:03,820 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12587 to 6638.
[2023-11-29 06:52:03,824 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6638 states, 6637 states have (on average 1.6624981166189543) internal successors, (11034), 6637 states have internal predecessors, (11034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:03,831 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 11034 transitions.
[2023-11-29 06:52:03,831 INFO  L78                 Accepts]: Start accepts. Automaton has 6638 states and 11034 transitions. Word has length 4425
[2023-11-29 06:52:03,833 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:52:03,833 INFO  L495      AbstractCegarLoop]: Abstraction has 6638 states and 11034 transitions.
[2023-11-29 06:52:03,833 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 595.7142857142857) internal successors, (4170), 7 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:03,834 INFO  L276                IsEmpty]: Start isEmpty. Operand 6638 states and 11034 transitions.
[2023-11-29 06:52:03,913 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4427
[2023-11-29 06:52:03,913 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:52:03,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:52:04,017 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-29 06:52:04,114 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:52:04,114 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:52:04,115 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:52:04,115 INFO  L85        PathProgramCache]: Analyzing trace with hash -16808025, now seen corresponding path program 1 times
[2023-11-29 06:52:04,115 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:52:04,115 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623776765]
[2023-11-29 06:52:04,116 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:52:04,116 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:52:04,629 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:52:04,629 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128529269]
[2023-11-29 06:52:04,630 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:52:04,630 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:52:04,630 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:52:04,631 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:52:04,632 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-29 06:52:13,642 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:52:13,910 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36980 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:52:14,010 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:52:14,237 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked.
[2023-11-29 06:52:14,238 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:52:14,238 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:52:14,238 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623776765]
[2023-11-29 06:52:14,238 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:52:14,238 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128529269]
[2023-11-29 06:52:14,238 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [128529269] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:52:14,238 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:52:14,240 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:52:14,240 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754882876]
[2023-11-29 06:52:14,240 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:52:14,243 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:52:14,243 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:52:14,245 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:52:14,245 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:52:14,246 INFO  L87              Difference]: Start difference. First operand 6638 states and 11034 transitions. Second operand  has 7 states, 7 states have (on average 596.1428571428571) internal successors, (4173), 7 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:14,775 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:52:14,775 INFO  L93              Difference]: Finished difference Result 18641 states and 30982 transitions.
[2023-11-29 06:52:14,775 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:52:14,776 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 596.1428571428571) internal successors, (4173), 7 states have internal predecessors, (4173), 0 states have call successors, (0), 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 4426
[2023-11-29 06:52:14,780 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:52:14,789 INFO  L225             Difference]: With dead ends: 18641
[2023-11-29 06:52:14,789 INFO  L226             Difference]: Without dead ends: 12588
[2023-11-29 06:52:14,794 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4435 GetRequests, 4423 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:52:14,794 INFO  L413           NwaCegarLoop]: 10905 mSDtfsCounter, 29273 mSDsluCounter, 42969 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29273 SdHoareTripleChecker+Valid, 53874 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:52:14,795 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29273 Valid, 53874 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:52:14,807 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12588 states.
[2023-11-29 06:52:14,884 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12588 to 6640.
[2023-11-29 06:52:14,890 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6640 states, 6639 states have (on average 1.6622985389365867) internal successors, (11036), 6639 states have internal predecessors, (11036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:14,897 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6640 states to 6640 states and 11036 transitions.
[2023-11-29 06:52:14,898 INFO  L78                 Accepts]: Start accepts. Automaton has 6640 states and 11036 transitions. Word has length 4426
[2023-11-29 06:52:14,900 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:52:14,900 INFO  L495      AbstractCegarLoop]: Abstraction has 6640 states and 11036 transitions.
[2023-11-29 06:52:14,901 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 596.1428571428571) internal successors, (4173), 7 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:14,901 INFO  L276                IsEmpty]: Start isEmpty. Operand 6640 states and 11036 transitions.
[2023-11-29 06:52:14,979 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4428
[2023-11-29 06:52:14,979 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:52:14,980 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:52:15,105 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-29 06:52:15,181 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2023-11-29 06:52:15,181 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:52:15,181 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:52:15,183 INFO  L85        PathProgramCache]: Analyzing trace with hash -91631179, now seen corresponding path program 1 times
[2023-11-29 06:52:15,183 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:52:15,183 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759703131]
[2023-11-29 06:52:15,185 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:52:15,185 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:52:15,971 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:52:15,971 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214153009]
[2023-11-29 06:52:15,972 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:52:15,973 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:52:15,973 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:52:15,974 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:52:15,979 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-29 06:52:25,857 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:52:26,103 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36984 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:52:26,187 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:52:26,408 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked.
[2023-11-29 06:52:26,408 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:52:26,408 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:52:26,408 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759703131]
[2023-11-29 06:52:26,409 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:52:26,409 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214153009]
[2023-11-29 06:52:26,409 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [214153009] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:52:26,409 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:52:26,410 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:52:26,411 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752865184]
[2023-11-29 06:52:26,411 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:52:26,413 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:52:26,413 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:52:26,415 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:52:26,415 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:52:26,416 INFO  L87              Difference]: Start difference. First operand 6640 states and 11036 transitions. Second operand  has 7 states, 7 states have (on average 596.5714285714286) internal successors, (4176), 7 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:26,899 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:52:26,899 INFO  L93              Difference]: Finished difference Result 18647 states and 30988 transitions.
[2023-11-29 06:52:26,899 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:52:26,900 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 596.5714285714286) internal successors, (4176), 7 states have internal predecessors, (4176), 0 states have call successors, (0), 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 4427
[2023-11-29 06:52:26,904 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:52:26,915 INFO  L225             Difference]: With dead ends: 18647
[2023-11-29 06:52:26,915 INFO  L226             Difference]: Without dead ends: 12589
[2023-11-29 06:52:26,921 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4436 GetRequests, 4424 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:52:26,921 INFO  L413           NwaCegarLoop]: 10900 mSDtfsCounter, 29272 mSDsluCounter, 42954 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29272 SdHoareTripleChecker+Valid, 53854 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-29 06:52:26,922 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29272 Valid, 53854 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-29 06:52:26,935 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12589 states.
[2023-11-29 06:52:27,011 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12589 to 6642.
[2023-11-29 06:52:27,017 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6642 states, 6641 states have (on average 1.662099081463635) internal successors, (11038), 6641 states have internal predecessors, (11038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:27,027 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6642 states to 6642 states and 11038 transitions.
[2023-11-29 06:52:27,028 INFO  L78                 Accepts]: Start accepts. Automaton has 6642 states and 11038 transitions. Word has length 4427
[2023-11-29 06:52:27,030 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:52:27,030 INFO  L495      AbstractCegarLoop]: Abstraction has 6642 states and 11038 transitions.
[2023-11-29 06:52:27,031 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 596.5714285714286) internal successors, (4176), 7 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:27,032 INFO  L276                IsEmpty]: Start isEmpty. Operand 6642 states and 11038 transitions.
[2023-11-29 06:52:27,114 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4429
[2023-11-29 06:52:27,114 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:52:27,116 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:52:27,230 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0
[2023-11-29 06:52:27,317 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:52:27,317 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:52:27,317 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:52:27,318 INFO  L85        PathProgramCache]: Analyzing trace with hash 1119946575, now seen corresponding path program 1 times
[2023-11-29 06:52:27,318 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:52:27,318 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253079812]
[2023-11-29 06:52:27,318 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:52:27,318 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:52:27,968 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:52:27,968 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53869721]
[2023-11-29 06:52:27,970 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:52:27,970 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:52:27,970 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:52:27,971 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:52:27,972 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-29 06:52:37,723 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:52:37,997 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36987 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:52:38,076 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:52:38,296 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked.
[2023-11-29 06:52:38,296 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:52:38,296 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:52:38,296 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253079812]
[2023-11-29 06:52:38,296 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:52:38,297 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53869721]
[2023-11-29 06:52:38,297 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [53869721] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:52:38,297 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:52:38,298 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:52:38,299 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073527762]
[2023-11-29 06:52:38,299 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:52:38,301 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:52:38,301 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:52:38,304 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:52:38,304 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:52:38,305 INFO  L87              Difference]: Start difference. First operand 6642 states and 11038 transitions. Second operand  has 7 states, 7 states have (on average 597.0) internal successors, (4179), 7 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:38,730 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:52:38,730 INFO  L93              Difference]: Finished difference Result 18653 states and 30994 transitions.
[2023-11-29 06:52:38,731 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:52:38,732 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 597.0) internal successors, (4179), 7 states have internal predecessors, (4179), 0 states have call successors, (0), 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 4428
[2023-11-29 06:52:38,735 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:52:38,744 INFO  L225             Difference]: With dead ends: 18653
[2023-11-29 06:52:38,744 INFO  L226             Difference]: Without dead ends: 12590
[2023-11-29 06:52:38,749 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4437 GetRequests, 4425 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:52:38,749 INFO  L413           NwaCegarLoop]: 10895 mSDtfsCounter, 29271 mSDsluCounter, 42939 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29271 SdHoareTripleChecker+Valid, 53834 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:52:38,749 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29271 Valid, 53834 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:52:38,760 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12590 states.
[2023-11-29 06:52:38,823 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12590 to 6644.
[2023-11-29 06:52:38,829 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6644 states, 6643 states have (on average 1.6618997440915249) internal successors, (11040), 6643 states have internal predecessors, (11040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:38,836 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6644 states to 6644 states and 11040 transitions.
[2023-11-29 06:52:38,836 INFO  L78                 Accepts]: Start accepts. Automaton has 6644 states and 11040 transitions. Word has length 4428
[2023-11-29 06:52:38,838 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:52:38,838 INFO  L495      AbstractCegarLoop]: Abstraction has 6644 states and 11040 transitions.
[2023-11-29 06:52:38,839 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 597.0) internal successors, (4179), 7 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:38,839 INFO  L276                IsEmpty]: Start isEmpty. Operand 6644 states and 11040 transitions.
[2023-11-29 06:52:38,915 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4430
[2023-11-29 06:52:38,915 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:52:38,916 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:52:39,033 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0
[2023-11-29 06:52:39,117 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:52:39,118 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:52:39,119 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:52:39,122 INFO  L85        PathProgramCache]: Analyzing trace with hash 865832463, now seen corresponding path program 1 times
[2023-11-29 06:52:39,122 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:52:39,122 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745275883]
[2023-11-29 06:52:39,124 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:52:39,125 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:52:39,908 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:52:39,908 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229211768]
[2023-11-29 06:52:39,909 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:52:39,909 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:52:39,909 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:52:39,910 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:52:39,911 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-29 06:52:49,348 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:52:49,603 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36990 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:52:49,679 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:52:49,901 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked.
[2023-11-29 06:52:49,901 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:52:49,901 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:52:49,901 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745275883]
[2023-11-29 06:52:49,901 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:52:49,901 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229211768]
[2023-11-29 06:52:49,901 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [229211768] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:52:49,901 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:52:49,903 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:52:49,903 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423534813]
[2023-11-29 06:52:49,903 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:52:49,905 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:52:49,905 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:52:49,908 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:52:49,908 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:52:49,909 INFO  L87              Difference]: Start difference. First operand 6644 states and 11040 transitions. Second operand  has 7 states, 7 states have (on average 597.4285714285714) internal successors, (4182), 7 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:50,374 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:52:50,374 INFO  L93              Difference]: Finished difference Result 18659 states and 31000 transitions.
[2023-11-29 06:52:50,374 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:52:50,376 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 597.4285714285714) internal successors, (4182), 7 states have internal predecessors, (4182), 0 states have call successors, (0), 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 4429
[2023-11-29 06:52:50,379 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:52:50,391 INFO  L225             Difference]: With dead ends: 18659
[2023-11-29 06:52:50,391 INFO  L226             Difference]: Without dead ends: 12591
[2023-11-29 06:52:50,397 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4438 GetRequests, 4426 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:52:50,397 INFO  L413           NwaCegarLoop]: 10890 mSDtfsCounter, 29270 mSDsluCounter, 42924 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29270 SdHoareTripleChecker+Valid, 53814 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:52:50,397 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29270 Valid, 53814 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:52:50,411 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12591 states.
[2023-11-29 06:52:50,491 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12591 to 6646.
[2023-11-29 06:52:50,497 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6646 states, 6645 states have (on average 1.6617005267118135) internal successors, (11042), 6645 states have internal predecessors, (11042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:50,509 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6646 states to 6646 states and 11042 transitions.
[2023-11-29 06:52:50,509 INFO  L78                 Accepts]: Start accepts. Automaton has 6646 states and 11042 transitions. Word has length 4429
[2023-11-29 06:52:50,511 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:52:50,511 INFO  L495      AbstractCegarLoop]: Abstraction has 6646 states and 11042 transitions.
[2023-11-29 06:52:50,512 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 597.4285714285714) internal successors, (4182), 7 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:52:50,512 INFO  L276                IsEmpty]: Start isEmpty. Operand 6646 states and 11042 transitions.
[2023-11-29 06:52:50,598 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4431
[2023-11-29 06:52:50,598 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:52:50,599 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:52:50,720 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0
[2023-11-29 06:52:50,799 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:52:50,800 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:52:50,800 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:52:50,802 INFO  L85        PathProgramCache]: Analyzing trace with hash 2083129333, now seen corresponding path program 1 times
[2023-11-29 06:52:50,802 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:52:50,802 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105994536]
[2023-11-29 06:52:50,803 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:52:50,803 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:52:51,361 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:52:51,361 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727567636]
[2023-11-29 06:52:51,362 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:52:51,363 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:52:51,363 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:52:51,364 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:52:51,367 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-29 06:53:01,119 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:53:01,367 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36993 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:53:01,442 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:53:01,662 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked.
[2023-11-29 06:53:01,663 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:53:01,663 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:53:01,663 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105994536]
[2023-11-29 06:53:01,663 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:53:01,663 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727567636]
[2023-11-29 06:53:01,663 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727567636] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:53:01,663 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:53:01,665 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:53:01,665 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601685189]
[2023-11-29 06:53:01,665 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:53:01,668 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:53:01,669 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:53:01,672 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:53:01,672 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:53:01,674 INFO  L87              Difference]: Start difference. First operand 6646 states and 11042 transitions. Second operand  has 7 states, 7 states have (on average 597.8571428571429) internal successors, (4185), 7 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:02,165 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:53:02,165 INFO  L93              Difference]: Finished difference Result 18665 states and 31006 transitions.
[2023-11-29 06:53:02,166 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:53:02,167 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 597.8571428571429) internal successors, (4185), 7 states have internal predecessors, (4185), 0 states have call successors, (0), 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 4430
[2023-11-29 06:53:02,171 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:53:02,182 INFO  L225             Difference]: With dead ends: 18665
[2023-11-29 06:53:02,182 INFO  L226             Difference]: Without dead ends: 12592
[2023-11-29 06:53:02,188 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4439 GetRequests, 4427 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:53:02,188 INFO  L413           NwaCegarLoop]: 10885 mSDtfsCounter, 29269 mSDsluCounter, 42909 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29269 SdHoareTripleChecker+Valid, 53794 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:53:02,189 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29269 Valid, 53794 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:53:02,202 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12592 states.
[2023-11-29 06:53:02,276 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12592 to 6648.
[2023-11-29 06:53:02,281 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6648 states, 6647 states have (on average 1.6615014292161878) internal successors, (11044), 6647 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:02,291 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6648 states to 6648 states and 11044 transitions.
[2023-11-29 06:53:02,292 INFO  L78                 Accepts]: Start accepts. Automaton has 6648 states and 11044 transitions. Word has length 4430
[2023-11-29 06:53:02,294 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:53:02,294 INFO  L495      AbstractCegarLoop]: Abstraction has 6648 states and 11044 transitions.
[2023-11-29 06:53:02,295 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 597.8571428571429) internal successors, (4185), 7 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:02,296 INFO  L276                IsEmpty]: Start isEmpty. Operand 6648 states and 11044 transitions.
[2023-11-29 06:53:02,375 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4432
[2023-11-29 06:53:02,376 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:53:02,377 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:53:02,504 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0
[2023-11-29 06:53:02,590 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:53:02,590 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:53:02,591 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:53:02,591 INFO  L85        PathProgramCache]: Analyzing trace with hash -253434261, now seen corresponding path program 1 times
[2023-11-29 06:53:02,592 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:53:02,592 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752674529]
[2023-11-29 06:53:02,592 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:53:02,592 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:53:03,300 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:53:03,301 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142152676]
[2023-11-29 06:53:03,301 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:53:03,302 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:53:03,302 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:53:03,303 INFO  L229       MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:53:03,305 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process
[2023-11-29 06:53:12,600 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:53:12,842 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36997 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:53:12,943 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:53:13,154 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked.
[2023-11-29 06:53:13,155 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:53:13,155 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:53:13,155 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752674529]
[2023-11-29 06:53:13,155 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:53:13,155 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142152676]
[2023-11-29 06:53:13,155 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142152676] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:53:13,155 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:53:13,157 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:53:13,157 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680889794]
[2023-11-29 06:53:13,157 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:53:13,160 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:53:13,160 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:53:13,163 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:53:13,164 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:53:13,165 INFO  L87              Difference]: Start difference. First operand 6648 states and 11044 transitions. Second operand  has 7 states, 7 states have (on average 598.2857142857143) internal successors, (4188), 7 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:13,653 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:53:13,653 INFO  L93              Difference]: Finished difference Result 18671 states and 31012 transitions.
[2023-11-29 06:53:13,654 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:53:13,655 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 598.2857142857143) internal successors, (4188), 7 states have internal predecessors, (4188), 0 states have call successors, (0), 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 4431
[2023-11-29 06:53:13,658 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:53:13,669 INFO  L225             Difference]: With dead ends: 18671
[2023-11-29 06:53:13,669 INFO  L226             Difference]: Without dead ends: 12593
[2023-11-29 06:53:13,674 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4440 GetRequests, 4428 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:53:13,675 INFO  L413           NwaCegarLoop]: 10880 mSDtfsCounter, 29268 mSDsluCounter, 42894 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29268 SdHoareTripleChecker+Valid, 53774 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:53:13,675 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29268 Valid, 53774 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:53:13,687 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12593 states.
[2023-11-29 06:53:13,754 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12593 to 6650.
[2023-11-29 06:53:13,760 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6650 states, 6649 states have (on average 1.6613024514964656) internal successors, (11046), 6649 states have internal predecessors, (11046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:13,770 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6650 states to 6650 states and 11046 transitions.
[2023-11-29 06:53:13,770 INFO  L78                 Accepts]: Start accepts. Automaton has 6650 states and 11046 transitions. Word has length 4431
[2023-11-29 06:53:13,773 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:53:13,773 INFO  L495      AbstractCegarLoop]: Abstraction has 6650 states and 11046 transitions.
[2023-11-29 06:53:13,774 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 598.2857142857143) internal successors, (4188), 7 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:13,774 INFO  L276                IsEmpty]: Start isEmpty. Operand 6650 states and 11046 transitions.
[2023-11-29 06:53:13,854 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4433
[2023-11-29 06:53:13,854 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:53:13,856 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:53:13,965 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0
[2023-11-29 06:53:14,057 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25
[2023-11-29 06:53:14,057 INFO  L420      AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:53:14,057 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:53:14,058 INFO  L85        PathProgramCache]: Analyzing trace with hash 1363703965, now seen corresponding path program 1 times
[2023-11-29 06:53:14,058 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:53:14,058 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823418166]
[2023-11-29 06:53:14,058 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:53:14,059 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:53:14,619 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:53:14,619 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823799865]
[2023-11-29 06:53:14,620 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:53:14,620 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:53:14,620 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:53:14,621 INFO  L229       MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:53:14,622 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process
[2023-11-29 06:53:23,747 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:53:23,988 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37000 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:53:24,072 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:53:24,546 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked.
[2023-11-29 06:53:24,546 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:53:24,546 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:53:24,547 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823418166]
[2023-11-29 06:53:24,547 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:53:24,547 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823799865]
[2023-11-29 06:53:24,547 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823799865] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:53:24,547 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:53:24,548 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:53:24,549 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847302334]
[2023-11-29 06:53:24,549 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:53:24,552 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:53:24,552 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:53:24,555 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:53:24,555 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:53:24,556 INFO  L87              Difference]: Start difference. First operand 6650 states and 11046 transitions. Second operand  has 7 states, 7 states have (on average 598.7142857142857) internal successors, (4191), 7 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:24,987 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:53:24,987 INFO  L93              Difference]: Finished difference Result 18677 states and 31018 transitions.
[2023-11-29 06:53:24,987 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:53:24,988 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 598.7142857142857) internal successors, (4191), 7 states have internal predecessors, (4191), 0 states have call successors, (0), 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 4432
[2023-11-29 06:53:24,991 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:53:25,000 INFO  L225             Difference]: With dead ends: 18677
[2023-11-29 06:53:25,000 INFO  L226             Difference]: Without dead ends: 12594
[2023-11-29 06:53:25,004 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4441 GetRequests, 4429 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:53:25,005 INFO  L413           NwaCegarLoop]: 10875 mSDtfsCounter, 29267 mSDsluCounter, 42879 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29267 SdHoareTripleChecker+Valid, 53754 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:53:25,005 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29267 Valid, 53754 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:53:25,014 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12594 states.
[2023-11-29 06:53:25,070 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 6652.
[2023-11-29 06:53:25,075 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6652 states, 6651 states have (on average 1.6611035934445948) internal successors, (11048), 6651 states have internal predecessors, (11048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:25,082 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6652 states to 6652 states and 11048 transitions.
[2023-11-29 06:53:25,082 INFO  L78                 Accepts]: Start accepts. Automaton has 6652 states and 11048 transitions. Word has length 4432
[2023-11-29 06:53:25,084 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:53:25,084 INFO  L495      AbstractCegarLoop]: Abstraction has 6652 states and 11048 transitions.
[2023-11-29 06:53:25,085 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 598.7142857142857) internal successors, (4191), 7 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:25,085 INFO  L276                IsEmpty]: Start isEmpty. Operand 6652 states and 11048 transitions.
[2023-11-29 06:53:25,160 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4434
[2023-11-29 06:53:25,161 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:53:25,162 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:53:25,273 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0
[2023-11-29 06:53:25,362 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26
[2023-11-29 06:53:25,363 INFO  L420      AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:53:25,363 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:53:25,364 INFO  L85        PathProgramCache]: Analyzing trace with hash 462118597, now seen corresponding path program 1 times
[2023-11-29 06:53:25,364 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:53:25,365 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485617725]
[2023-11-29 06:53:25,366 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:53:25,366 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:53:25,868 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:53:25,868 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386451861]
[2023-11-29 06:53:25,869 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:53:25,869 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:53:25,869 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:53:25,870 INFO  L229       MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:53:25,871 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process
[2023-11-29 06:53:34,973 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:53:35,209 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37003 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:53:35,281 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:53:35,488 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked.
[2023-11-29 06:53:35,488 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:53:35,489 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:53:35,489 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485617725]
[2023-11-29 06:53:35,489 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:53:35,489 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386451861]
[2023-11-29 06:53:35,489 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [386451861] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:53:35,489 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:53:35,490 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:53:35,490 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694865575]
[2023-11-29 06:53:35,490 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:53:35,492 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:53:35,492 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:53:35,495 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:53:35,495 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:53:35,495 INFO  L87              Difference]: Start difference. First operand 6652 states and 11048 transitions. Second operand  has 7 states, 7 states have (on average 599.1428571428571) internal successors, (4194), 7 states have internal predecessors, (4194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:35,926 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:53:35,926 INFO  L93              Difference]: Finished difference Result 18683 states and 31024 transitions.
[2023-11-29 06:53:35,926 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:53:35,927 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 599.1428571428571) internal successors, (4194), 7 states have internal predecessors, (4194), 0 states have call successors, (0), 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 4433
[2023-11-29 06:53:35,930 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:53:35,939 INFO  L225             Difference]: With dead ends: 18683
[2023-11-29 06:53:35,939 INFO  L226             Difference]: Without dead ends: 12595
[2023-11-29 06:53:35,944 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4442 GetRequests, 4430 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:53:35,944 INFO  L413           NwaCegarLoop]: 10870 mSDtfsCounter, 29266 mSDsluCounter, 42864 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29266 SdHoareTripleChecker+Valid, 53734 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:53:35,944 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29266 Valid, 53734 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:53:35,954 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12595 states.
[2023-11-29 06:53:36,008 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12595 to 6654.
[2023-11-29 06:53:36,014 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6654 states, 6653 states have (on average 1.6609048549526528) internal successors, (11050), 6653 states have internal predecessors, (11050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:36,021 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6654 states to 6654 states and 11050 transitions.
[2023-11-29 06:53:36,021 INFO  L78                 Accepts]: Start accepts. Automaton has 6654 states and 11050 transitions. Word has length 4433
[2023-11-29 06:53:36,023 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:53:36,023 INFO  L495      AbstractCegarLoop]: Abstraction has 6654 states and 11050 transitions.
[2023-11-29 06:53:36,024 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 599.1428571428571) internal successors, (4194), 7 states have internal predecessors, (4194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:36,024 INFO  L276                IsEmpty]: Start isEmpty. Operand 6654 states and 11050 transitions.
[2023-11-29 06:53:36,099 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4435
[2023-11-29 06:53:36,099 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:53:36,100 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:53:36,205 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0
[2023-11-29 06:53:36,300 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27
[2023-11-29 06:53:36,300 INFO  L420      AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:53:36,301 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:53:36,301 INFO  L85        PathProgramCache]: Analyzing trace with hash 1974967619, now seen corresponding path program 1 times
[2023-11-29 06:53:36,301 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:53:36,301 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361675057]
[2023-11-29 06:53:36,302 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:53:36,302 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:53:36,810 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:53:36,811 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264049975]
[2023-11-29 06:53:36,811 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:53:36,811 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:53:36,811 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:53:36,812 INFO  L229       MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:53:36,813 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process
[2023-11-29 06:53:45,784 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:53:46,021 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37006 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:53:46,091 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:53:46,287 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked.
[2023-11-29 06:53:46,287 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:53:46,287 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:53:46,287 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361675057]
[2023-11-29 06:53:46,287 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:53:46,287 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264049975]
[2023-11-29 06:53:46,287 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264049975] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:53:46,287 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:53:46,289 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:53:46,289 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002113641]
[2023-11-29 06:53:46,289 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:53:46,291 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:53:46,291 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:53:46,294 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:53:46,294 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:53:46,295 INFO  L87              Difference]: Start difference. First operand 6654 states and 11050 transitions. Second operand  has 7 states, 7 states have (on average 599.5714285714286) internal successors, (4197), 7 states have internal predecessors, (4197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:46,702 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:53:46,702 INFO  L93              Difference]: Finished difference Result 18689 states and 31030 transitions.
[2023-11-29 06:53:46,703 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:53:46,704 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 599.5714285714286) internal successors, (4197), 7 states have internal predecessors, (4197), 0 states have call successors, (0), 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 4434
[2023-11-29 06:53:46,707 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:53:46,715 INFO  L225             Difference]: With dead ends: 18689
[2023-11-29 06:53:46,715 INFO  L226             Difference]: Without dead ends: 12596
[2023-11-29 06:53:46,720 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4443 GetRequests, 4431 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:53:46,720 INFO  L413           NwaCegarLoop]: 10865 mSDtfsCounter, 29265 mSDsluCounter, 42849 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29265 SdHoareTripleChecker+Valid, 53714 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:53:46,720 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29265 Valid, 53714 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:53:46,730 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12596 states.
[2023-11-29 06:53:46,784 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12596 to 6656.
[2023-11-29 06:53:46,789 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6656 states, 6655 states have (on average 1.6607062359128475) internal successors, (11052), 6655 states have internal predecessors, (11052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:46,796 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 11052 transitions.
[2023-11-29 06:53:46,796 INFO  L78                 Accepts]: Start accepts. Automaton has 6656 states and 11052 transitions. Word has length 4434
[2023-11-29 06:53:46,798 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:53:46,798 INFO  L495      AbstractCegarLoop]: Abstraction has 6656 states and 11052 transitions.
[2023-11-29 06:53:46,799 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 599.5714285714286) internal successors, (4197), 7 states have internal predecessors, (4197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:46,799 INFO  L276                IsEmpty]: Start isEmpty. Operand 6656 states and 11052 transitions.
[2023-11-29 06:53:47,013 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4436
[2023-11-29 06:53:47,013 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:53:47,014 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:53:47,119 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0
[2023-11-29 06:53:47,214 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28
[2023-11-29 06:53:47,215 INFO  L420      AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:53:47,215 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:53:47,216 INFO  L85        PathProgramCache]: Analyzing trace with hash -820723679, now seen corresponding path program 1 times
[2023-11-29 06:53:47,216 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:53:47,216 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051375860]
[2023-11-29 06:53:47,216 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:53:47,216 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:53:47,744 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:53:47,745 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272275674]
[2023-11-29 06:53:47,745 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:53:47,746 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:53:47,746 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:53:47,746 INFO  L229       MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:53:47,747 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process
[2023-11-29 06:53:56,566 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:53:56,813 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37010 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:53:56,916 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:53:57,130 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked.
[2023-11-29 06:53:57,130 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:53:57,130 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:53:57,131 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051375860]
[2023-11-29 06:53:57,131 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:53:57,131 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272275674]
[2023-11-29 06:53:57,131 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [272275674] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:53:57,131 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:53:57,133 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:53:57,133 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326839049]
[2023-11-29 06:53:57,133 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:53:57,135 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:53:57,135 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:53:57,138 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:53:57,138 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:53:57,139 INFO  L87              Difference]: Start difference. First operand 6656 states and 11052 transitions. Second operand  has 7 states, 7 states have (on average 600.0) internal successors, (4200), 7 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:57,666 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:53:57,666 INFO  L93              Difference]: Finished difference Result 18695 states and 31036 transitions.
[2023-11-29 06:53:57,666 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:53:57,667 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 600.0) internal successors, (4200), 7 states have internal predecessors, (4200), 0 states have call successors, (0), 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 4435
[2023-11-29 06:53:57,671 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:53:57,680 INFO  L225             Difference]: With dead ends: 18695
[2023-11-29 06:53:57,680 INFO  L226             Difference]: Without dead ends: 12597
[2023-11-29 06:53:57,684 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4444 GetRequests, 4432 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:53:57,685 INFO  L413           NwaCegarLoop]: 10860 mSDtfsCounter, 29264 mSDsluCounter, 42834 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29264 SdHoareTripleChecker+Valid, 53694 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:53:57,685 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29264 Valid, 53694 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:53:57,697 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12597 states.
[2023-11-29 06:53:57,763 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12597 to 6658.
[2023-11-29 06:53:57,769 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6658 states, 6657 states have (on average 1.6605077362175154) internal successors, (11054), 6657 states have internal predecessors, (11054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:57,778 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6658 states to 6658 states and 11054 transitions.
[2023-11-29 06:53:57,778 INFO  L78                 Accepts]: Start accepts. Automaton has 6658 states and 11054 transitions. Word has length 4435
[2023-11-29 06:53:57,780 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:53:57,780 INFO  L495      AbstractCegarLoop]: Abstraction has 6658 states and 11054 transitions.
[2023-11-29 06:53:57,781 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 600.0) internal successors, (4200), 7 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:53:57,781 INFO  L276                IsEmpty]: Start isEmpty. Operand 6658 states and 11054 transitions.
[2023-11-29 06:53:57,858 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4437
[2023-11-29 06:53:57,858 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:53:57,859 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:53:57,979 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0
[2023-11-29 06:53:58,059 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:53:58,060 INFO  L420      AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:53:58,060 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:53:58,061 INFO  L85        PathProgramCache]: Analyzing trace with hash -638386453, now seen corresponding path program 1 times
[2023-11-29 06:53:58,061 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:53:58,061 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249022191]
[2023-11-29 06:53:58,062 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:53:58,062 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:53:58,629 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:53:58,629 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364625297]
[2023-11-29 06:53:58,630 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:53:58,630 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:53:58,630 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:53:58,631 INFO  L229       MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:53:58,631 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process
[2023-11-29 06:54:08,142 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:54:08,391 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37013 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:54:08,465 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:54:08,697 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked.
[2023-11-29 06:54:08,698 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:54:08,698 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:54:08,698 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249022191]
[2023-11-29 06:54:08,698 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:54:08,698 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364625297]
[2023-11-29 06:54:08,698 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [364625297] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:54:08,698 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:54:08,700 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:54:08,700 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021193043]
[2023-11-29 06:54:08,700 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:54:08,703 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:54:08,703 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:54:08,706 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:54:08,706 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:54:08,708 INFO  L87              Difference]: Start difference. First operand 6658 states and 11054 transitions. Second operand  has 7 states, 7 states have (on average 600.4285714285714) internal successors, (4203), 7 states have internal predecessors, (4203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:09,196 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:54:09,196 INFO  L93              Difference]: Finished difference Result 18701 states and 31042 transitions.
[2023-11-29 06:54:09,197 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:54:09,198 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 600.4285714285714) internal successors, (4203), 7 states have internal predecessors, (4203), 0 states have call successors, (0), 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 4436
[2023-11-29 06:54:09,201 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:54:09,210 INFO  L225             Difference]: With dead ends: 18701
[2023-11-29 06:54:09,210 INFO  L226             Difference]: Without dead ends: 12598
[2023-11-29 06:54:09,215 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4445 GetRequests, 4433 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:54:09,216 INFO  L413           NwaCegarLoop]: 10855 mSDtfsCounter, 29263 mSDsluCounter, 42819 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29263 SdHoareTripleChecker+Valid, 53674 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:54:09,216 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29263 Valid, 53674 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:54:09,226 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12598 states.
[2023-11-29 06:54:09,281 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12598 to 6660.
[2023-11-29 06:54:09,287 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6660 states, 6659 states have (on average 1.660309355759123) internal successors, (11056), 6659 states have internal predecessors, (11056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:09,294 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6660 states to 6660 states and 11056 transitions.
[2023-11-29 06:54:09,294 INFO  L78                 Accepts]: Start accepts. Automaton has 6660 states and 11056 transitions. Word has length 4436
[2023-11-29 06:54:09,296 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:54:09,296 INFO  L495      AbstractCegarLoop]: Abstraction has 6660 states and 11056 transitions.
[2023-11-29 06:54:09,296 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 600.4285714285714) internal successors, (4203), 7 states have internal predecessors, (4203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:09,297 INFO  L276                IsEmpty]: Start isEmpty. Operand 6660 states and 11056 transitions.
[2023-11-29 06:54:09,533 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4438
[2023-11-29 06:54:09,533 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:54:09,534 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:54:09,641 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0
[2023-11-29 06:54:09,734 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:54:09,735 INFO  L420      AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:54:09,735 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:54:09,735 INFO  L85        PathProgramCache]: Analyzing trace with hash 1805939835, now seen corresponding path program 1 times
[2023-11-29 06:54:09,735 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:54:09,736 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940749291]
[2023-11-29 06:54:09,736 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:54:09,736 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:54:10,239 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:54:10,239 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762377730]
[2023-11-29 06:54:10,240 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:54:10,240 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:54:10,240 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:54:10,241 INFO  L229       MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:54:10,242 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process
[2023-11-29 06:54:19,772 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:54:20,063 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37016 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:54:20,155 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:54:20,375 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked.
[2023-11-29 06:54:20,375 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:54:20,376 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:54:20,376 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940749291]
[2023-11-29 06:54:20,376 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:54:20,376 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762377730]
[2023-11-29 06:54:20,376 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [762377730] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:54:20,376 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:54:20,378 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:54:20,378 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299988160]
[2023-11-29 06:54:20,378 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:54:20,381 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:54:20,381 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:54:20,383 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:54:20,383 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:54:20,384 INFO  L87              Difference]: Start difference. First operand 6660 states and 11056 transitions. Second operand  has 7 states, 7 states have (on average 600.8571428571429) internal successors, (4206), 7 states have internal predecessors, (4206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:20,835 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:54:20,835 INFO  L93              Difference]: Finished difference Result 18707 states and 31048 transitions.
[2023-11-29 06:54:20,836 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:54:20,837 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 600.8571428571429) internal successors, (4206), 7 states have internal predecessors, (4206), 0 states have call successors, (0), 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 4437
[2023-11-29 06:54:20,840 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:54:20,849 INFO  L225             Difference]: With dead ends: 18707
[2023-11-29 06:54:20,849 INFO  L226             Difference]: Without dead ends: 12599
[2023-11-29 06:54:20,855 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4446 GetRequests, 4434 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:54:20,855 INFO  L413           NwaCegarLoop]: 10850 mSDtfsCounter, 29262 mSDsluCounter, 42804 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29262 SdHoareTripleChecker+Valid, 53654 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:54:20,855 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29262 Valid, 53654 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:54:20,867 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12599 states.
[2023-11-29 06:54:20,932 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12599 to 6662.
[2023-11-29 06:54:20,938 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6662 states, 6661 states have (on average 1.6601110944302657) internal successors, (11058), 6661 states have internal predecessors, (11058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:20,947 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6662 states to 6662 states and 11058 transitions.
[2023-11-29 06:54:20,947 INFO  L78                 Accepts]: Start accepts. Automaton has 6662 states and 11058 transitions. Word has length 4437
[2023-11-29 06:54:20,949 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:54:20,949 INFO  L495      AbstractCegarLoop]: Abstraction has 6662 states and 11058 transitions.
[2023-11-29 06:54:20,950 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 600.8571428571429) internal successors, (4206), 7 states have internal predecessors, (4206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:20,951 INFO  L276                IsEmpty]: Start isEmpty. Operand 6662 states and 11058 transitions.
[2023-11-29 06:54:21,029 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4439
[2023-11-29 06:54:21,029 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:54:21,030 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:54:21,152 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0
[2023-11-29 06:54:21,230 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:54:21,231 INFO  L420      AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:54:21,231 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:54:21,232 INFO  L85        PathProgramCache]: Analyzing trace with hash -1449932911, now seen corresponding path program 1 times
[2023-11-29 06:54:21,232 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:54:21,232 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960960379]
[2023-11-29 06:54:21,233 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:54:21,233 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:54:21,781 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:54:21,781 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124067213]
[2023-11-29 06:54:21,782 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:54:21,782 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:54:21,782 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:54:21,783 INFO  L229       MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:54:21,784 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process
[2023-11-29 06:54:31,281 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:54:31,532 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37019 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:54:31,836 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:54:32,031 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked.
[2023-11-29 06:54:32,031 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:54:32,031 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:54:32,031 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960960379]
[2023-11-29 06:54:32,031 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:54:32,031 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124067213]
[2023-11-29 06:54:32,031 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124067213] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:54:32,031 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:54:32,033 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:54:32,033 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807594093]
[2023-11-29 06:54:32,033 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:54:32,035 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:54:32,036 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:54:32,038 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:54:32,038 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:54:32,039 INFO  L87              Difference]: Start difference. First operand 6662 states and 11058 transitions. Second operand  has 7 states, 7 states have (on average 601.2857142857143) internal successors, (4209), 7 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:32,568 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:54:32,568 INFO  L93              Difference]: Finished difference Result 18713 states and 31054 transitions.
[2023-11-29 06:54:32,568 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:54:32,569 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 601.2857142857143) internal successors, (4209), 7 states have internal predecessors, (4209), 0 states have call successors, (0), 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 4438
[2023-11-29 06:54:32,573 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:54:32,582 INFO  L225             Difference]: With dead ends: 18713
[2023-11-29 06:54:32,582 INFO  L226             Difference]: Without dead ends: 12600
[2023-11-29 06:54:32,587 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4447 GetRequests, 4435 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:54:32,588 INFO  L413           NwaCegarLoop]: 10845 mSDtfsCounter, 29261 mSDsluCounter, 42789 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29261 SdHoareTripleChecker+Valid, 53634 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:54:32,588 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29261 Valid, 53634 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:54:32,599 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12600 states.
[2023-11-29 06:54:32,663 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12600 to 6664.
[2023-11-29 06:54:32,669 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6664 states, 6663 states have (on average 1.659912952123668) internal successors, (11060), 6663 states have internal predecessors, (11060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:32,678 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6664 states to 6664 states and 11060 transitions.
[2023-11-29 06:54:32,678 INFO  L78                 Accepts]: Start accepts. Automaton has 6664 states and 11060 transitions. Word has length 4438
[2023-11-29 06:54:32,680 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:54:32,680 INFO  L495      AbstractCegarLoop]: Abstraction has 6664 states and 11060 transitions.
[2023-11-29 06:54:32,681 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 601.2857142857143) internal successors, (4209), 7 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:32,681 INFO  L276                IsEmpty]: Start isEmpty. Operand 6664 states and 11060 transitions.
[2023-11-29 06:54:32,763 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4440
[2023-11-29 06:54:32,763 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:54:32,764 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:54:32,888 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0
[2023-11-29 06:54:32,964 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:54:32,965 INFO  L420      AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:54:32,965 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:54:32,966 INFO  L85        PathProgramCache]: Analyzing trace with hash 748084951, now seen corresponding path program 1 times
[2023-11-29 06:54:32,966 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:54:32,966 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108095869]
[2023-11-29 06:54:32,966 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:54:32,966 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:54:33,507 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:54:33,508 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569133863]
[2023-11-29 06:54:33,508 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:54:33,509 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:54:33,509 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:54:33,509 INFO  L229       MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:54:33,510 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process
[2023-11-29 06:54:42,892 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:54:43,139 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37023 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:54:43,221 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:54:43,429 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked.
[2023-11-29 06:54:43,430 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:54:43,430 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:54:43,430 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108095869]
[2023-11-29 06:54:43,430 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:54:43,430 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569133863]
[2023-11-29 06:54:43,430 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569133863] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:54:43,430 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:54:43,432 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:54:43,432 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924112720]
[2023-11-29 06:54:43,432 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:54:43,434 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:54:43,435 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:54:43,437 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:54:43,437 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:54:43,438 INFO  L87              Difference]: Start difference. First operand 6664 states and 11060 transitions. Second operand  has 7 states, 7 states have (on average 601.7142857142857) internal successors, (4212), 7 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:43,878 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:54:43,878 INFO  L93              Difference]: Finished difference Result 18719 states and 31060 transitions.
[2023-11-29 06:54:43,878 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:54:43,880 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 601.7142857142857) internal successors, (4212), 7 states have internal predecessors, (4212), 0 states have call successors, (0), 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 4439
[2023-11-29 06:54:43,884 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:54:43,895 INFO  L225             Difference]: With dead ends: 18719
[2023-11-29 06:54:43,895 INFO  L226             Difference]: Without dead ends: 12601
[2023-11-29 06:54:43,900 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4448 GetRequests, 4436 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:54:43,900 INFO  L413           NwaCegarLoop]: 10840 mSDtfsCounter, 29260 mSDsluCounter, 42774 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29260 SdHoareTripleChecker+Valid, 53614 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:54:43,900 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29260 Valid, 53614 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:54:43,912 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12601 states.
[2023-11-29 06:54:43,977 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12601 to 6666.
[2023-11-29 06:54:43,983 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6666 states, 6665 states have (on average 1.659714928732183) internal successors, (11062), 6665 states have internal predecessors, (11062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:43,991 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 11062 transitions.
[2023-11-29 06:54:43,991 INFO  L78                 Accepts]: Start accepts. Automaton has 6666 states and 11062 transitions. Word has length 4439
[2023-11-29 06:54:43,993 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:54:43,993 INFO  L495      AbstractCegarLoop]: Abstraction has 6666 states and 11062 transitions.
[2023-11-29 06:54:43,994 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 601.7142857142857) internal successors, (4212), 7 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:43,994 INFO  L276                IsEmpty]: Start isEmpty. Operand 6666 states and 11062 transitions.
[2023-11-29 06:54:44,073 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4441
[2023-11-29 06:54:44,074 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:54:44,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:54:44,199 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0
[2023-11-29 06:54:44,275 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33
[2023-11-29 06:54:44,275 INFO  L420      AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:54:44,275 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:54:44,276 INFO  L85        PathProgramCache]: Analyzing trace with hash -840164807, now seen corresponding path program 1 times
[2023-11-29 06:54:44,276 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:54:44,276 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693800698]
[2023-11-29 06:54:44,276 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:54:44,276 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:54:44,815 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:54:44,815 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133006683]
[2023-11-29 06:54:44,816 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:54:44,816 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:54:44,816 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:54:44,817 INFO  L229       MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:54:44,818 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process
[2023-11-29 06:54:53,791 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:54:54,048 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37026 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:54:54,130 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:54:54,331 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked.
[2023-11-29 06:54:54,331 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:54:54,331 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:54:54,331 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693800698]
[2023-11-29 06:54:54,331 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:54:54,331 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133006683]
[2023-11-29 06:54:54,331 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [133006683] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:54:54,331 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:54:54,333 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:54:54,333 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934520610]
[2023-11-29 06:54:54,333 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:54:54,336 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:54:54,336 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:54:54,338 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:54:54,338 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:54:54,339 INFO  L87              Difference]: Start difference. First operand 6666 states and 11062 transitions. Second operand  has 7 states, 7 states have (on average 602.1428571428571) internal successors, (4215), 7 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:54,883 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:54:54,883 INFO  L93              Difference]: Finished difference Result 18725 states and 31066 transitions.
[2023-11-29 06:54:54,883 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:54:54,884 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 602.1428571428571) internal successors, (4215), 7 states have internal predecessors, (4215), 0 states have call successors, (0), 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 4440
[2023-11-29 06:54:54,888 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:54:54,896 INFO  L225             Difference]: With dead ends: 18725
[2023-11-29 06:54:54,897 INFO  L226             Difference]: Without dead ends: 12602
[2023-11-29 06:54:54,901 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4449 GetRequests, 4437 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:54:54,902 INFO  L413           NwaCegarLoop]: 10835 mSDtfsCounter, 29259 mSDsluCounter, 42759 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29259 SdHoareTripleChecker+Valid, 53594 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:54:54,902 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29259 Valid, 53594 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:54:54,914 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12602 states.
[2023-11-29 06:54:54,977 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12602 to 6668.
[2023-11-29 06:54:54,983 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6668 states, 6667 states have (on average 1.6595170241487927) internal successors, (11064), 6667 states have internal predecessors, (11064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:54,991 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6668 states to 6668 states and 11064 transitions.
[2023-11-29 06:54:54,992 INFO  L78                 Accepts]: Start accepts. Automaton has 6668 states and 11064 transitions. Word has length 4440
[2023-11-29 06:54:54,994 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:54:54,994 INFO  L495      AbstractCegarLoop]: Abstraction has 6668 states and 11064 transitions.
[2023-11-29 06:54:54,995 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 602.1428571428571) internal successors, (4215), 7 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:54:54,995 INFO  L276                IsEmpty]: Start isEmpty. Operand 6668 states and 11064 transitions.
[2023-11-29 06:54:55,073 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4442
[2023-11-29 06:54:55,073 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:54:55,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:54:55,196 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0
[2023-11-29 06:54:55,274 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34
[2023-11-29 06:54:55,274 INFO  L420      AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:54:55,275 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:54:55,275 INFO  L85        PathProgramCache]: Analyzing trace with hash -177975503, now seen corresponding path program 1 times
[2023-11-29 06:54:55,275 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:54:55,275 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372231329]
[2023-11-29 06:54:55,276 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:54:55,276 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:54:55,825 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:54:55,825 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121204507]
[2023-11-29 06:54:55,826 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:54:55,826 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:54:55,826 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:54:55,827 INFO  L229       MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:54:55,828 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process
[2023-11-29 06:55:05,205 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:55:05,461 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37029 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:55:05,542 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:55:05,753 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked.
[2023-11-29 06:55:05,754 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:55:05,754 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:55:05,754 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372231329]
[2023-11-29 06:55:05,754 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:55:05,754 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121204507]
[2023-11-29 06:55:05,754 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [121204507] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:55:05,754 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:55:05,756 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:55:05,756 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272102350]
[2023-11-29 06:55:05,756 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:55:05,759 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:55:05,759 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:55:05,760 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:55:05,761 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:55:05,762 INFO  L87              Difference]: Start difference. First operand 6668 states and 11064 transitions. Second operand  has 7 states, 7 states have (on average 602.5714285714286) internal successors, (4218), 7 states have internal predecessors, (4218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:06,202 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:55:06,203 INFO  L93              Difference]: Finished difference Result 18731 states and 31072 transitions.
[2023-11-29 06:55:06,203 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:55:06,204 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 602.5714285714286) internal successors, (4218), 7 states have internal predecessors, (4218), 0 states have call successors, (0), 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 4441
[2023-11-29 06:55:06,207 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:55:06,216 INFO  L225             Difference]: With dead ends: 18731
[2023-11-29 06:55:06,217 INFO  L226             Difference]: Without dead ends: 12603
[2023-11-29 06:55:06,221 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4450 GetRequests, 4438 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:55:06,222 INFO  L413           NwaCegarLoop]: 10830 mSDtfsCounter, 29258 mSDsluCounter, 42744 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29258 SdHoareTripleChecker+Valid, 53574 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:55:06,222 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29258 Valid, 53574 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:55:06,234 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12603 states.
[2023-11-29 06:55:06,299 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12603 to 6670.
[2023-11-29 06:55:06,305 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6670 states, 6669 states have (on average 1.6593192382666067) internal successors, (11066), 6669 states have internal predecessors, (11066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:06,313 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 11066 transitions.
[2023-11-29 06:55:06,313 INFO  L78                 Accepts]: Start accepts. Automaton has 6670 states and 11066 transitions. Word has length 4441
[2023-11-29 06:55:06,316 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:55:06,316 INFO  L495      AbstractCegarLoop]: Abstraction has 6670 states and 11066 transitions.
[2023-11-29 06:55:06,317 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 602.5714285714286) internal successors, (4218), 7 states have internal predecessors, (4218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:06,317 INFO  L276                IsEmpty]: Start isEmpty. Operand 6670 states and 11066 transitions.
[2023-11-29 06:55:06,397 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4443
[2023-11-29 06:55:06,397 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:55:06,398 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:55:06,523 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0
[2023-11-29 06:55:06,598 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35
[2023-11-29 06:55:06,598 INFO  L420      AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:55:06,599 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:55:06,600 INFO  L85        PathProgramCache]: Analyzing trace with hash -1494612257, now seen corresponding path program 1 times
[2023-11-29 06:55:06,600 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:55:06,600 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095510752]
[2023-11-29 06:55:06,600 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:55:06,600 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:55:07,162 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:55:07,162 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274430421]
[2023-11-29 06:55:07,163 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:55:07,163 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:55:07,163 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:55:07,164 INFO  L229       MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:55:07,165 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process
[2023-11-29 06:55:16,543 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:55:16,796 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37032 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:55:17,088 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:55:17,285 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked.
[2023-11-29 06:55:17,285 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:55:17,285 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:55:17,286 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095510752]
[2023-11-29 06:55:17,286 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:55:17,286 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274430421]
[2023-11-29 06:55:17,286 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [274430421] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:55:17,286 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:55:17,287 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:55:17,287 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581035678]
[2023-11-29 06:55:17,288 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:55:17,290 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:55:17,291 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:55:17,294 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:55:17,294 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:55:17,295 INFO  L87              Difference]: Start difference. First operand 6670 states and 11066 transitions. Second operand  has 7 states, 7 states have (on average 603.0) internal successors, (4221), 7 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:17,744 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:55:17,744 INFO  L93              Difference]: Finished difference Result 18737 states and 31078 transitions.
[2023-11-29 06:55:17,744 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:55:17,746 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 603.0) internal successors, (4221), 7 states have internal predecessors, (4221), 0 states have call successors, (0), 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 4442
[2023-11-29 06:55:17,749 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:55:17,758 INFO  L225             Difference]: With dead ends: 18737
[2023-11-29 06:55:17,758 INFO  L226             Difference]: Without dead ends: 12604
[2023-11-29 06:55:17,763 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4451 GetRequests, 4439 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:55:17,763 INFO  L413           NwaCegarLoop]: 10825 mSDtfsCounter, 29257 mSDsluCounter, 42729 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29257 SdHoareTripleChecker+Valid, 53554 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:55:17,764 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29257 Valid, 53554 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:55:17,778 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12604 states.
[2023-11-29 06:55:17,842 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12604 to 6672.
[2023-11-29 06:55:17,848 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6672 states, 6671 states have (on average 1.6591215709788638) internal successors, (11068), 6671 states have internal predecessors, (11068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:17,856 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6672 states to 6672 states and 11068 transitions.
[2023-11-29 06:55:17,857 INFO  L78                 Accepts]: Start accepts. Automaton has 6672 states and 11068 transitions. Word has length 4442
[2023-11-29 06:55:17,859 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:55:17,859 INFO  L495      AbstractCegarLoop]: Abstraction has 6672 states and 11068 transitions.
[2023-11-29 06:55:17,860 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 603.0) internal successors, (4221), 7 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:17,860 INFO  L276                IsEmpty]: Start isEmpty. Operand 6672 states and 11068 transitions.
[2023-11-29 06:55:17,941 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4444
[2023-11-29 06:55:17,941 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:55:17,942 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:55:18,064 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0
[2023-11-29 06:55:18,142 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36
[2023-11-29 06:55:18,143 INFO  L420      AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:55:18,143 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:55:18,144 INFO  L85        PathProgramCache]: Analyzing trace with hash -903298419, now seen corresponding path program 1 times
[2023-11-29 06:55:18,144 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:55:18,144 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956382399]
[2023-11-29 06:55:18,144 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:55:18,144 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:55:18,694 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:55:18,694 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427579491]
[2023-11-29 06:55:18,695 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:55:18,695 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:55:18,695 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:55:18,696 INFO  L229       MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:55:18,698 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process
[2023-11-29 06:55:28,161 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:55:28,416 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37036 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:55:28,498 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:55:28,704 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked.
[2023-11-29 06:55:28,704 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:55:28,704 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:55:28,705 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956382399]
[2023-11-29 06:55:28,705 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:55:28,705 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427579491]
[2023-11-29 06:55:28,705 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [427579491] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:55:28,705 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:55:28,707 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:55:28,707 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726945900]
[2023-11-29 06:55:28,707 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:55:28,709 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:55:28,709 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:55:28,711 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:55:28,711 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:55:28,712 INFO  L87              Difference]: Start difference. First operand 6672 states and 11068 transitions. Second operand  has 7 states, 7 states have (on average 603.4285714285714) internal successors, (4224), 7 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:29,159 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:55:29,159 INFO  L93              Difference]: Finished difference Result 18743 states and 31084 transitions.
[2023-11-29 06:55:29,160 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:55:29,161 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 603.4285714285714) internal successors, (4224), 7 states have internal predecessors, (4224), 0 states have call successors, (0), 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 4443
[2023-11-29 06:55:29,164 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:55:29,173 INFO  L225             Difference]: With dead ends: 18743
[2023-11-29 06:55:29,173 INFO  L226             Difference]: Without dead ends: 12605
[2023-11-29 06:55:29,178 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4452 GetRequests, 4440 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:55:29,178 INFO  L413           NwaCegarLoop]: 10820 mSDtfsCounter, 29256 mSDsluCounter, 42714 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29256 SdHoareTripleChecker+Valid, 53534 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:55:29,178 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29256 Valid, 53534 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:55:29,190 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12605 states.
[2023-11-29 06:55:29,256 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12605 to 6674.
[2023-11-29 06:55:29,262 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6674 states, 6673 states have (on average 1.65892402217893) internal successors, (11070), 6673 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:29,270 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6674 states to 6674 states and 11070 transitions.
[2023-11-29 06:55:29,270 INFO  L78                 Accepts]: Start accepts. Automaton has 6674 states and 11070 transitions. Word has length 4443
[2023-11-29 06:55:29,272 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:55:29,273 INFO  L495      AbstractCegarLoop]: Abstraction has 6674 states and 11070 transitions.
[2023-11-29 06:55:29,273 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 603.4285714285714) internal successors, (4224), 7 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:29,274 INFO  L276                IsEmpty]: Start isEmpty. Operand 6674 states and 11070 transitions.
[2023-11-29 06:55:29,362 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4445
[2023-11-29 06:55:29,362 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:55:29,363 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:55:29,485 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0
[2023-11-29 06:55:29,564 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37
[2023-11-29 06:55:29,564 INFO  L420      AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:55:29,565 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:55:29,565 INFO  L85        PathProgramCache]: Analyzing trace with hash 1872710279, now seen corresponding path program 1 times
[2023-11-29 06:55:29,565 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:55:29,565 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818760411]
[2023-11-29 06:55:29,566 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:55:29,566 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:55:30,110 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:55:30,110 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18630328]
[2023-11-29 06:55:30,111 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:55:30,111 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:55:30,111 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:55:30,112 INFO  L229       MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:55:30,113 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process
[2023-11-29 06:55:39,466 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:55:39,717 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37039 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:55:39,795 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:55:40,005 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked.
[2023-11-29 06:55:40,005 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:55:40,005 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:55:40,005 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818760411]
[2023-11-29 06:55:40,005 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:55:40,005 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18630328]
[2023-11-29 06:55:40,005 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [18630328] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:55:40,005 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:55:40,007 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:55:40,007 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661942525]
[2023-11-29 06:55:40,007 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:55:40,010 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:55:40,010 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:55:40,012 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:55:40,012 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:55:40,013 INFO  L87              Difference]: Start difference. First operand 6674 states and 11070 transitions. Second operand  has 7 states, 7 states have (on average 603.8571428571429) internal successors, (4227), 7 states have internal predecessors, (4227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:40,467 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:55:40,467 INFO  L93              Difference]: Finished difference Result 18749 states and 31090 transitions.
[2023-11-29 06:55:40,468 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:55:40,469 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 603.8571428571429) internal successors, (4227), 7 states have internal predecessors, (4227), 0 states have call successors, (0), 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 4444
[2023-11-29 06:55:40,472 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:55:40,481 INFO  L225             Difference]: With dead ends: 18749
[2023-11-29 06:55:40,481 INFO  L226             Difference]: Without dead ends: 12606
[2023-11-29 06:55:40,486 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4453 GetRequests, 4441 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:55:40,487 INFO  L413           NwaCegarLoop]: 10815 mSDtfsCounter, 29255 mSDsluCounter, 42699 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29255 SdHoareTripleChecker+Valid, 53514 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:55:40,487 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29255 Valid, 53514 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:55:40,499 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12606 states.
[2023-11-29 06:55:40,566 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12606 to 6676.
[2023-11-29 06:55:40,572 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6676 states, 6675 states have (on average 1.6587265917602996) internal successors, (11072), 6675 states have internal predecessors, (11072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:40,581 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6676 states to 6676 states and 11072 transitions.
[2023-11-29 06:55:40,581 INFO  L78                 Accepts]: Start accepts. Automaton has 6676 states and 11072 transitions. Word has length 4444
[2023-11-29 06:55:40,583 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:55:40,584 INFO  L495      AbstractCegarLoop]: Abstraction has 6676 states and 11072 transitions.
[2023-11-29 06:55:40,584 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 603.8571428571429) internal successors, (4227), 7 states have internal predecessors, (4227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:40,585 INFO  L276                IsEmpty]: Start isEmpty. Operand 6676 states and 11072 transitions.
[2023-11-29 06:55:40,667 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4446
[2023-11-29 06:55:40,668 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:55:40,668 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:55:40,792 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0
[2023-11-29 06:55:40,869 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38
[2023-11-29 06:55:40,869 INFO  L420      AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:55:40,869 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:55:40,870 INFO  L85        PathProgramCache]: Analyzing trace with hash 1401450215, now seen corresponding path program 1 times
[2023-11-29 06:55:40,870 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:55:40,870 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343826542]
[2023-11-29 06:55:40,871 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:55:40,871 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:55:41,563 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:55:41,563 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661368561]
[2023-11-29 06:55:41,564 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:55:41,564 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:55:41,564 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:55:41,565 INFO  L229       MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:55:41,566 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process
[2023-11-29 06:55:50,757 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:55:51,011 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37042 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:55:51,104 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:55:51,323 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked.
[2023-11-29 06:55:51,323 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:55:51,323 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:55:51,324 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343826542]
[2023-11-29 06:55:51,324 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:55:51,324 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661368561]
[2023-11-29 06:55:51,324 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [661368561] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:55:51,324 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:55:51,326 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:55:51,326 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503602757]
[2023-11-29 06:55:51,326 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:55:51,328 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:55:51,328 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:55:51,329 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:55:51,329 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:55:51,330 INFO  L87              Difference]: Start difference. First operand 6676 states and 11072 transitions. Second operand  has 7 states, 7 states have (on average 604.2857142857143) internal successors, (4230), 7 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:51,751 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:55:51,751 INFO  L93              Difference]: Finished difference Result 18755 states and 31096 transitions.
[2023-11-29 06:55:51,751 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:55:51,752 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 604.2857142857143) internal successors, (4230), 7 states have internal predecessors, (4230), 0 states have call successors, (0), 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 4445
[2023-11-29 06:55:51,755 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:55:51,764 INFO  L225             Difference]: With dead ends: 18755
[2023-11-29 06:55:51,764 INFO  L226             Difference]: Without dead ends: 12607
[2023-11-29 06:55:51,769 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4454 GetRequests, 4442 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:55:51,769 INFO  L413           NwaCegarLoop]: 10810 mSDtfsCounter, 29254 mSDsluCounter, 42684 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29254 SdHoareTripleChecker+Valid, 53494 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:55:51,770 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29254 Valid, 53494 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:55:51,780 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12607 states.
[2023-11-29 06:55:51,844 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12607 to 6678.
[2023-11-29 06:55:51,850 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6678 states, 6677 states have (on average 1.6585292796165942) internal successors, (11074), 6677 states have internal predecessors, (11074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:51,858 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6678 states to 6678 states and 11074 transitions.
[2023-11-29 06:55:51,858 INFO  L78                 Accepts]: Start accepts. Automaton has 6678 states and 11074 transitions. Word has length 4445
[2023-11-29 06:55:51,861 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:55:51,861 INFO  L495      AbstractCegarLoop]: Abstraction has 6678 states and 11074 transitions.
[2023-11-29 06:55:51,862 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 604.2857142857143) internal successors, (4230), 7 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:55:51,862 INFO  L276                IsEmpty]: Start isEmpty. Operand 6678 states and 11074 transitions.
[2023-11-29 06:55:51,943 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4447
[2023-11-29 06:55:51,943 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:55:51,944 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:55:52,064 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0
[2023-11-29 06:55:52,144 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39
[2023-11-29 06:55:52,145 INFO  L420      AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:55:52,145 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:55:52,146 INFO  L85        PathProgramCache]: Analyzing trace with hash -1373250771, now seen corresponding path program 1 times
[2023-11-29 06:55:52,146 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:55:52,146 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740862633]
[2023-11-29 06:55:52,146 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:55:52,147 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:55:52,688 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:55:52,688 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742896920]
[2023-11-29 06:55:52,689 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:55:52,689 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:55:52,689 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:55:52,690 INFO  L229       MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:55:52,691 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process
[2023-11-29 06:56:01,962 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:56:02,217 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37045 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:56:02,299 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:56:02,510 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked.
[2023-11-29 06:56:02,510 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:56:02,510 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:56:02,511 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740862633]
[2023-11-29 06:56:02,511 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:56:02,511 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742896920]
[2023-11-29 06:56:02,511 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742896920] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:56:02,511 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:56:02,513 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:56:02,513 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221906849]
[2023-11-29 06:56:02,513 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:56:02,515 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:56:02,515 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:56:02,517 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:56:02,517 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:56:02,518 INFO  L87              Difference]: Start difference. First operand 6678 states and 11074 transitions. Second operand  has 7 states, 7 states have (on average 604.7142857142857) internal successors, (4233), 7 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:02,946 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:56:02,946 INFO  L93              Difference]: Finished difference Result 18761 states and 31102 transitions.
[2023-11-29 06:56:02,947 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:56:02,948 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 604.7142857142857) internal successors, (4233), 7 states have internal predecessors, (4233), 0 states have call successors, (0), 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 4446
[2023-11-29 06:56:02,951 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:56:02,961 INFO  L225             Difference]: With dead ends: 18761
[2023-11-29 06:56:02,961 INFO  L226             Difference]: Without dead ends: 12608
[2023-11-29 06:56:02,966 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4455 GetRequests, 4443 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:56:02,966 INFO  L413           NwaCegarLoop]: 10805 mSDtfsCounter, 29253 mSDsluCounter, 42669 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29253 SdHoareTripleChecker+Valid, 53474 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:56:02,966 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29253 Valid, 53474 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:56:02,977 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12608 states.
[2023-11-29 06:56:03,041 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12608 to 6680.
[2023-11-29 06:56:03,047 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6680 states, 6679 states have (on average 1.658332085641563) internal successors, (11076), 6679 states have internal predecessors, (11076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:03,055 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6680 states to 6680 states and 11076 transitions.
[2023-11-29 06:56:03,055 INFO  L78                 Accepts]: Start accepts. Automaton has 6680 states and 11076 transitions. Word has length 4446
[2023-11-29 06:56:03,058 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:56:03,058 INFO  L495      AbstractCegarLoop]: Abstraction has 6680 states and 11076 transitions.
[2023-11-29 06:56:03,059 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 604.7142857142857) internal successors, (4233), 7 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:03,059 INFO  L276                IsEmpty]: Start isEmpty. Operand 6680 states and 11076 transitions.
[2023-11-29 06:56:03,260 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4448
[2023-11-29 06:56:03,260 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:56:03,261 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:56:03,381 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0
[2023-11-29 06:56:03,461 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40
[2023-11-29 06:56:03,462 INFO  L420      AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:56:03,462 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:56:03,462 INFO  L85        PathProgramCache]: Analyzing trace with hash -238556349, now seen corresponding path program 1 times
[2023-11-29 06:56:03,462 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:56:03,462 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159705393]
[2023-11-29 06:56:03,463 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:56:03,463 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:56:03,998 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:56:03,998 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089592382]
[2023-11-29 06:56:03,999 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:56:03,999 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:56:03,999 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:56:04,000 INFO  L229       MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:56:04,000 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process
[2023-11-29 06:56:13,415 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:56:13,668 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37049 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:56:13,746 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:56:13,951 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked.
[2023-11-29 06:56:13,951 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:56:13,951 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:56:13,951 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159705393]
[2023-11-29 06:56:13,952 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:56:13,952 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089592382]
[2023-11-29 06:56:13,952 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089592382] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:56:13,952 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:56:13,953 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:56:13,954 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841253926]
[2023-11-29 06:56:13,954 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:56:13,955 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:56:13,956 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:56:13,957 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:56:13,958 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:56:13,959 INFO  L87              Difference]: Start difference. First operand 6680 states and 11076 transitions. Second operand  has 7 states, 7 states have (on average 605.1428571428571) internal successors, (4236), 7 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:14,387 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:56:14,387 INFO  L93              Difference]: Finished difference Result 18767 states and 31108 transitions.
[2023-11-29 06:56:14,388 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:56:14,389 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 605.1428571428571) internal successors, (4236), 7 states have internal predecessors, (4236), 0 states have call successors, (0), 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 4447
[2023-11-29 06:56:14,391 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:56:14,400 INFO  L225             Difference]: With dead ends: 18767
[2023-11-29 06:56:14,400 INFO  L226             Difference]: Without dead ends: 12609
[2023-11-29 06:56:14,405 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4456 GetRequests, 4444 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:56:14,406 INFO  L413           NwaCegarLoop]: 10800 mSDtfsCounter, 29252 mSDsluCounter, 42654 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29252 SdHoareTripleChecker+Valid, 53454 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:56:14,406 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29252 Valid, 53454 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:56:14,417 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12609 states.
[2023-11-29 06:56:14,481 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12609 to 6682.
[2023-11-29 06:56:14,487 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6682 states, 6681 states have (on average 1.6581350097290826) internal successors, (11078), 6681 states have internal predecessors, (11078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:14,495 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6682 states to 6682 states and 11078 transitions.
[2023-11-29 06:56:14,495 INFO  L78                 Accepts]: Start accepts. Automaton has 6682 states and 11078 transitions. Word has length 4447
[2023-11-29 06:56:14,498 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:56:14,498 INFO  L495      AbstractCegarLoop]: Abstraction has 6682 states and 11078 transitions.
[2023-11-29 06:56:14,499 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 605.1428571428571) internal successors, (4236), 7 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:14,499 INFO  L276                IsEmpty]: Start isEmpty. Operand 6682 states and 11078 transitions.
[2023-11-29 06:56:14,579 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4449
[2023-11-29 06:56:14,579 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:56:14,580 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:56:14,696 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0
[2023-11-29 06:56:14,780 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41
[2023-11-29 06:56:14,781 INFO  L420      AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:56:14,781 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:56:14,782 INFO  L85        PathProgramCache]: Analyzing trace with hash 850923477, now seen corresponding path program 1 times
[2023-11-29 06:56:14,782 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:56:14,782 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005302684]
[2023-11-29 06:56:14,782 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:56:14,783 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:56:15,321 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:56:15,321 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107369221]
[2023-11-29 06:56:15,322 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:56:15,322 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:56:15,322 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:56:15,323 INFO  L229       MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:56:15,324 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process
[2023-11-29 06:56:24,630 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:56:24,892 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37052 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:56:24,975 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:56:25,188 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked.
[2023-11-29 06:56:25,188 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:56:25,188 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:56:25,188 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005302684]
[2023-11-29 06:56:25,188 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:56:25,188 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107369221]
[2023-11-29 06:56:25,188 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107369221] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:56:25,188 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:56:25,190 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:56:25,190 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190302582]
[2023-11-29 06:56:25,190 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:56:25,193 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:56:25,193 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:56:25,195 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:56:25,195 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:56:25,196 INFO  L87              Difference]: Start difference. First operand 6682 states and 11078 transitions. Second operand  has 7 states, 7 states have (on average 605.5714285714286) internal successors, (4239), 7 states have internal predecessors, (4239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:25,788 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:56:25,788 INFO  L93              Difference]: Finished difference Result 18773 states and 31114 transitions.
[2023-11-29 06:56:25,788 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:56:25,789 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 605.5714285714286) internal successors, (4239), 7 states have internal predecessors, (4239), 0 states have call successors, (0), 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 4448
[2023-11-29 06:56:25,792 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:56:25,800 INFO  L225             Difference]: With dead ends: 18773
[2023-11-29 06:56:25,800 INFO  L226             Difference]: Without dead ends: 12610
[2023-11-29 06:56:25,804 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4457 GetRequests, 4445 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:56:25,805 INFO  L413           NwaCegarLoop]: 10795 mSDtfsCounter, 29251 mSDsluCounter, 42639 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29251 SdHoareTripleChecker+Valid, 53434 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:56:25,805 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29251 Valid, 53434 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:56:25,817 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12610 states.
[2023-11-29 06:56:25,883 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12610 to 6684.
[2023-11-29 06:56:25,889 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6684 states, 6683 states have (on average 1.6579380517731557) internal successors, (11080), 6683 states have internal predecessors, (11080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:25,897 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6684 states to 6684 states and 11080 transitions.
[2023-11-29 06:56:25,897 INFO  L78                 Accepts]: Start accepts. Automaton has 6684 states and 11080 transitions. Word has length 4448
[2023-11-29 06:56:25,900 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:56:25,900 INFO  L495      AbstractCegarLoop]: Abstraction has 6684 states and 11080 transitions.
[2023-11-29 06:56:25,901 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 605.5714285714286) internal successors, (4239), 7 states have internal predecessors, (4239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:25,901 INFO  L276                IsEmpty]: Start isEmpty. Operand 6684 states and 11080 transitions.
[2023-11-29 06:56:25,988 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4450
[2023-11-29 06:56:25,988 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:56:25,989 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:56:26,111 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0
[2023-11-29 06:56:26,189 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42
[2023-11-29 06:56:26,189 INFO  L420      AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:56:26,190 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:56:26,190 INFO  L85        PathProgramCache]: Analyzing trace with hash 1242452893, now seen corresponding path program 1 times
[2023-11-29 06:56:26,190 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:56:26,191 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134292616]
[2023-11-29 06:56:26,191 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:56:26,191 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:56:26,753 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:56:26,753 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609969949]
[2023-11-29 06:56:26,754 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:56:26,754 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:56:26,754 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:56:26,755 INFO  L229       MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:56:26,756 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process
[2023-11-29 06:56:36,160 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:56:36,417 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37055 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:56:36,500 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:56:36,707 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked.
[2023-11-29 06:56:36,707 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:56:36,707 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:56:36,707 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134292616]
[2023-11-29 06:56:36,707 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:56:36,708 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609969949]
[2023-11-29 06:56:36,708 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609969949] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:56:36,708 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:56:36,709 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:56:36,709 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524881152]
[2023-11-29 06:56:36,709 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:56:36,711 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:56:36,711 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:56:36,713 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:56:36,713 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:56:36,714 INFO  L87              Difference]: Start difference. First operand 6684 states and 11080 transitions. Second operand  has 7 states, 7 states have (on average 606.0) internal successors, (4242), 7 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:37,164 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:56:37,164 INFO  L93              Difference]: Finished difference Result 18779 states and 31120 transitions.
[2023-11-29 06:56:37,165 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:56:37,166 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 606.0) internal successors, (4242), 7 states have internal predecessors, (4242), 0 states have call successors, (0), 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 4449
[2023-11-29 06:56:37,169 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:56:37,178 INFO  L225             Difference]: With dead ends: 18779
[2023-11-29 06:56:37,178 INFO  L226             Difference]: Without dead ends: 12611
[2023-11-29 06:56:37,183 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4458 GetRequests, 4446 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:56:37,184 INFO  L413           NwaCegarLoop]: 10790 mSDtfsCounter, 29250 mSDsluCounter, 42624 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29250 SdHoareTripleChecker+Valid, 53414 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:56:37,184 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29250 Valid, 53414 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:56:37,195 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12611 states.
[2023-11-29 06:56:37,261 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12611 to 6686.
[2023-11-29 06:56:37,267 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6686 states, 6685 states have (on average 1.6577412116679133) internal successors, (11082), 6685 states have internal predecessors, (11082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:37,275 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6686 states to 6686 states and 11082 transitions.
[2023-11-29 06:56:37,275 INFO  L78                 Accepts]: Start accepts. Automaton has 6686 states and 11082 transitions. Word has length 4449
[2023-11-29 06:56:37,278 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:56:37,278 INFO  L495      AbstractCegarLoop]: Abstraction has 6686 states and 11082 transitions.
[2023-11-29 06:56:37,279 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 606.0) internal successors, (4242), 7 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:37,279 INFO  L276                IsEmpty]: Start isEmpty. Operand 6686 states and 11082 transitions.
[2023-11-29 06:56:37,360 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4451
[2023-11-29 06:56:37,361 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:56:37,361 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:56:37,482 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0
[2023-11-29 06:56:37,562 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43
[2023-11-29 06:56:37,562 INFO  L420      AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:56:37,562 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:56:37,563 INFO  L85        PathProgramCache]: Analyzing trace with hash -1863138181, now seen corresponding path program 1 times
[2023-11-29 06:56:37,563 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:56:37,563 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888990384]
[2023-11-29 06:56:37,563 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:56:37,564 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:56:38,112 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:56:38,112 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358606687]
[2023-11-29 06:56:38,113 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:56:38,113 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:56:38,113 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:56:38,114 INFO  L229       MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:56:38,115 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process
[2023-11-29 06:56:47,693 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:56:47,948 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37058 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:56:48,034 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:56:48,255 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked.
[2023-11-29 06:56:48,255 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:56:48,255 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:56:48,255 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888990384]
[2023-11-29 06:56:48,255 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:56:48,255 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358606687]
[2023-11-29 06:56:48,256 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358606687] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:56:48,256 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:56:48,257 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:56:48,257 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158326277]
[2023-11-29 06:56:48,257 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:56:48,259 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:56:48,259 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:56:48,261 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:56:48,261 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:56:48,262 INFO  L87              Difference]: Start difference. First operand 6686 states and 11082 transitions. Second operand  has 7 states, 7 states have (on average 606.4285714285714) internal successors, (4245), 7 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:48,711 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:56:48,711 INFO  L93              Difference]: Finished difference Result 18785 states and 31126 transitions.
[2023-11-29 06:56:48,711 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:56:48,712 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 606.4285714285714) internal successors, (4245), 7 states have internal predecessors, (4245), 0 states have call successors, (0), 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 4450
[2023-11-29 06:56:48,715 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:56:48,725 INFO  L225             Difference]: With dead ends: 18785
[2023-11-29 06:56:48,725 INFO  L226             Difference]: Without dead ends: 12612
[2023-11-29 06:56:48,730 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4459 GetRequests, 4447 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:56:48,730 INFO  L413           NwaCegarLoop]: 10785 mSDtfsCounter, 29249 mSDsluCounter, 42609 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29249 SdHoareTripleChecker+Valid, 53394 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:56:48,731 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29249 Valid, 53394 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:56:48,743 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12612 states.
[2023-11-29 06:56:48,808 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12612 to 6688.
[2023-11-29 06:56:48,814 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6688 states, 6687 states have (on average 1.657544489307612) internal successors, (11084), 6687 states have internal predecessors, (11084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:48,823 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6688 states to 6688 states and 11084 transitions.
[2023-11-29 06:56:48,823 INFO  L78                 Accepts]: Start accepts. Automaton has 6688 states and 11084 transitions. Word has length 4450
[2023-11-29 06:56:48,825 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:56:48,825 INFO  L495      AbstractCegarLoop]: Abstraction has 6688 states and 11084 transitions.
[2023-11-29 06:56:48,826 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 606.4285714285714) internal successors, (4245), 7 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:56:48,826 INFO  L276                IsEmpty]: Start isEmpty. Operand 6688 states and 11084 transitions.
[2023-11-29 06:56:48,906 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4452
[2023-11-29 06:56:48,906 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:56:48,907 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:56:49,028 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0
[2023-11-29 06:56:49,107 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:56:49,107 INFO  L420      AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:56:49,108 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:56:49,108 INFO  L85        PathProgramCache]: Analyzing trace with hash -692987655, now seen corresponding path program 1 times
[2023-11-29 06:56:49,108 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:56:49,108 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090063401]
[2023-11-29 06:56:49,109 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:56:49,109 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:56:49,795 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:56:49,795 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644785907]
[2023-11-29 06:56:49,796 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:56:49,796 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:56:49,796 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:56:49,797 INFO  L229       MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:56:49,798 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process
[2023-11-29 06:56:59,389 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:56:59,653 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37062 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:56:59,738 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:56:59,947 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked.
[2023-11-29 06:56:59,947 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:56:59,947 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:56:59,947 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090063401]
[2023-11-29 06:56:59,947 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:56:59,948 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644785907]
[2023-11-29 06:56:59,948 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [644785907] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:56:59,948 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:56:59,949 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:56:59,950 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55225946]
[2023-11-29 06:56:59,950 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:56:59,952 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:56:59,952 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:56:59,954 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:56:59,954 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:56:59,955 INFO  L87              Difference]: Start difference. First operand 6688 states and 11084 transitions. Second operand  has 7 states, 7 states have (on average 606.8571428571429) internal successors, (4248), 7 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:00,409 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:57:00,409 INFO  L93              Difference]: Finished difference Result 18791 states and 31132 transitions.
[2023-11-29 06:57:00,409 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:57:00,410 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 606.8571428571429) internal successors, (4248), 7 states have internal predecessors, (4248), 0 states have call successors, (0), 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 4451
[2023-11-29 06:57:00,413 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:57:00,423 INFO  L225             Difference]: With dead ends: 18791
[2023-11-29 06:57:00,423 INFO  L226             Difference]: Without dead ends: 12613
[2023-11-29 06:57:00,428 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4460 GetRequests, 4448 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:57:00,428 INFO  L413           NwaCegarLoop]: 10780 mSDtfsCounter, 29248 mSDsluCounter, 42594 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29248 SdHoareTripleChecker+Valid, 53374 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:57:00,428 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29248 Valid, 53374 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:57:00,440 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12613 states.
[2023-11-29 06:57:00,507 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12613 to 6690.
[2023-11-29 06:57:00,513 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6690 states, 6689 states have (on average 1.6573478845866347) internal successors, (11086), 6689 states have internal predecessors, (11086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:00,521 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6690 states to 6690 states and 11086 transitions.
[2023-11-29 06:57:00,522 INFO  L78                 Accepts]: Start accepts. Automaton has 6690 states and 11086 transitions. Word has length 4451
[2023-11-29 06:57:00,524 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:57:00,524 INFO  L495      AbstractCegarLoop]: Abstraction has 6690 states and 11086 transitions.
[2023-11-29 06:57:00,525 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 606.8571428571429) internal successors, (4248), 7 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:00,525 INFO  L276                IsEmpty]: Start isEmpty. Operand 6690 states and 11086 transitions.
[2023-11-29 06:57:00,608 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4453
[2023-11-29 06:57:00,608 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:57:00,608 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:57:00,730 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0
[2023-11-29 06:57:00,809 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45
[2023-11-29 06:57:00,809 INFO  L420      AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:57:00,810 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:57:00,810 INFO  L85        PathProgramCache]: Analyzing trace with hash -1675498973, now seen corresponding path program 1 times
[2023-11-29 06:57:00,810 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:57:00,810 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092739254]
[2023-11-29 06:57:00,811 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:57:00,811 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:57:01,392 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:57:01,392 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291019120]
[2023-11-29 06:57:01,393 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:57:01,394 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:57:01,394 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:57:01,395 INFO  L229       MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:57:01,395 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process
[2023-11-29 06:57:10,705 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:57:10,960 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37065 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:57:11,039 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:57:11,237 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked.
[2023-11-29 06:57:11,237 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:57:11,237 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:57:11,237 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092739254]
[2023-11-29 06:57:11,237 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:57:11,238 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291019120]
[2023-11-29 06:57:11,238 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291019120] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:57:11,238 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:57:11,239 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:57:11,239 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016752250]
[2023-11-29 06:57:11,239 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:57:11,241 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:57:11,241 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:57:11,243 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:57:11,243 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:57:11,244 INFO  L87              Difference]: Start difference. First operand 6690 states and 11086 transitions. Second operand  has 7 states, 7 states have (on average 607.2857142857143) internal successors, (4251), 7 states have internal predecessors, (4251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:11,671 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:57:11,671 INFO  L93              Difference]: Finished difference Result 18797 states and 31138 transitions.
[2023-11-29 06:57:11,671 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:57:11,672 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 607.2857142857143) internal successors, (4251), 7 states have internal predecessors, (4251), 0 states have call successors, (0), 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 4452
[2023-11-29 06:57:11,675 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:57:11,684 INFO  L225             Difference]: With dead ends: 18797
[2023-11-29 06:57:11,684 INFO  L226             Difference]: Without dead ends: 12614
[2023-11-29 06:57:11,689 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4461 GetRequests, 4449 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:57:11,690 INFO  L413           NwaCegarLoop]: 10775 mSDtfsCounter, 29247 mSDsluCounter, 42579 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29247 SdHoareTripleChecker+Valid, 53354 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:57:11,690 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29247 Valid, 53354 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:57:11,701 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12614 states.
[2023-11-29 06:57:11,762 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12614 to 6692.
[2023-11-29 06:57:11,768 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6692 states, 6691 states have (on average 1.6571513973994918) internal successors, (11088), 6691 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:11,776 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6692 states to 6692 states and 11088 transitions.
[2023-11-29 06:57:11,776 INFO  L78                 Accepts]: Start accepts. Automaton has 6692 states and 11088 transitions. Word has length 4452
[2023-11-29 06:57:11,778 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:57:11,778 INFO  L495      AbstractCegarLoop]: Abstraction has 6692 states and 11088 transitions.
[2023-11-29 06:57:11,779 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 607.2857142857143) internal successors, (4251), 7 states have internal predecessors, (4251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:11,779 INFO  L276                IsEmpty]: Start isEmpty. Operand 6692 states and 11088 transitions.
[2023-11-29 06:57:12,011 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4454
[2023-11-29 06:57:12,011 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:57:12,012 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:57:12,130 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0
[2023-11-29 06:57:12,213 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:57:12,213 INFO  L420      AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:57:12,213 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:57:12,214 INFO  L85        PathProgramCache]: Analyzing trace with hash 640908627, now seen corresponding path program 1 times
[2023-11-29 06:57:12,214 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:57:12,214 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562408266]
[2023-11-29 06:57:12,215 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:57:12,215 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:57:12,739 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:57:12,739 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136803155]
[2023-11-29 06:57:12,740 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:57:12,740 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:57:12,740 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:57:12,741 INFO  L229       MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:57:12,741 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process
[2023-11-29 06:57:21,869 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:57:22,124 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37068 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:57:22,206 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:57:22,411 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked.
[2023-11-29 06:57:22,411 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:57:22,412 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:57:22,412 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562408266]
[2023-11-29 06:57:22,412 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:57:22,412 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136803155]
[2023-11-29 06:57:22,412 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136803155] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:57:22,412 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:57:22,413 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:57:22,413 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396551605]
[2023-11-29 06:57:22,413 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:57:22,415 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:57:22,415 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:57:22,417 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:57:22,417 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:57:22,418 INFO  L87              Difference]: Start difference. First operand 6692 states and 11088 transitions. Second operand  has 7 states, 7 states have (on average 607.7142857142857) internal successors, (4254), 7 states have internal predecessors, (4254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:22,873 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:57:22,873 INFO  L93              Difference]: Finished difference Result 18803 states and 31144 transitions.
[2023-11-29 06:57:22,873 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:57:22,874 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 607.7142857142857) internal successors, (4254), 7 states have internal predecessors, (4254), 0 states have call successors, (0), 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 4453
[2023-11-29 06:57:22,877 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:57:22,886 INFO  L225             Difference]: With dead ends: 18803
[2023-11-29 06:57:22,887 INFO  L226             Difference]: Without dead ends: 12615
[2023-11-29 06:57:22,892 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4462 GetRequests, 4450 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:57:22,892 INFO  L413           NwaCegarLoop]: 10770 mSDtfsCounter, 29246 mSDsluCounter, 42564 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29246 SdHoareTripleChecker+Valid, 53334 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:57:22,892 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29246 Valid, 53334 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:57:22,904 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12615 states.
[2023-11-29 06:57:22,970 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12615 to 6694.
[2023-11-29 06:57:22,976 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6694 states, 6693 states have (on average 1.6569550276408187) internal successors, (11090), 6693 states have internal predecessors, (11090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:22,984 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6694 states to 6694 states and 11090 transitions.
[2023-11-29 06:57:22,984 INFO  L78                 Accepts]: Start accepts. Automaton has 6694 states and 11090 transitions. Word has length 4453
[2023-11-29 06:57:22,987 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:57:22,987 INFO  L495      AbstractCegarLoop]: Abstraction has 6694 states and 11090 transitions.
[2023-11-29 06:57:22,988 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 607.7142857142857) internal successors, (4254), 7 states have internal predecessors, (4254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:22,988 INFO  L276                IsEmpty]: Start isEmpty. Operand 6694 states and 11090 transitions.
[2023-11-29 06:57:23,067 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4455
[2023-11-29 06:57:23,067 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:57:23,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:57:23,188 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0
[2023-11-29 06:57:23,268 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47
[2023-11-29 06:57:23,268 INFO  L420      AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:57:23,269 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:57:23,269 INFO  L85        PathProgramCache]: Analyzing trace with hash -1841544503, now seen corresponding path program 1 times
[2023-11-29 06:57:23,269 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:57:23,269 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194093982]
[2023-11-29 06:57:23,270 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:57:23,270 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:57:23,811 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:57:23,811 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885508421]
[2023-11-29 06:57:23,812 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:57:23,812 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:57:23,812 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:57:23,813 INFO  L229       MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:57:23,814 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process
[2023-11-29 06:57:33,423 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:57:33,677 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37071 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:57:33,759 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:57:33,963 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked.
[2023-11-29 06:57:33,964 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:57:33,964 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:57:33,964 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194093982]
[2023-11-29 06:57:33,964 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:57:33,964 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885508421]
[2023-11-29 06:57:33,964 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [885508421] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:57:33,964 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:57:33,965 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:57:33,965 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949709682]
[2023-11-29 06:57:33,965 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:57:33,967 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:57:33,967 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:57:33,969 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:57:33,969 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:57:33,970 INFO  L87              Difference]: Start difference. First operand 6694 states and 11090 transitions. Second operand  has 7 states, 7 states have (on average 608.1428571428571) internal successors, (4257), 7 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:34,409 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:57:34,410 INFO  L93              Difference]: Finished difference Result 18809 states and 31150 transitions.
[2023-11-29 06:57:34,410 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:57:34,411 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 608.1428571428571) internal successors, (4257), 7 states have internal predecessors, (4257), 0 states have call successors, (0), 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 4454
[2023-11-29 06:57:34,414 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:57:34,423 INFO  L225             Difference]: With dead ends: 18809
[2023-11-29 06:57:34,423 INFO  L226             Difference]: Without dead ends: 12616
[2023-11-29 06:57:34,428 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4463 GetRequests, 4451 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:57:34,429 INFO  L413           NwaCegarLoop]: 10765 mSDtfsCounter, 29245 mSDsluCounter, 42549 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29245 SdHoareTripleChecker+Valid, 53314 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:57:34,429 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29245 Valid, 53314 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:57:34,441 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12616 states.
[2023-11-29 06:57:34,507 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12616 to 6696.
[2023-11-29 06:57:34,513 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6696 states, 6695 states have (on average 1.6567587752053772) internal successors, (11092), 6695 states have internal predecessors, (11092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:34,521 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6696 states to 6696 states and 11092 transitions.
[2023-11-29 06:57:34,521 INFO  L78                 Accepts]: Start accepts. Automaton has 6696 states and 11092 transitions. Word has length 4454
[2023-11-29 06:57:34,524 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:57:34,524 INFO  L495      AbstractCegarLoop]: Abstraction has 6696 states and 11092 transitions.
[2023-11-29 06:57:34,525 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 608.1428571428571) internal successors, (4257), 7 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:34,525 INFO  L276                IsEmpty]: Start isEmpty. Operand 6696 states and 11092 transitions.
[2023-11-29 06:57:34,766 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4456
[2023-11-29 06:57:34,766 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:57:34,767 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:57:34,885 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0
[2023-11-29 06:57:34,967 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48
[2023-11-29 06:57:34,968 INFO  L420      AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:57:34,968 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:57:34,969 INFO  L85        PathProgramCache]: Analyzing trace with hash -177992785, now seen corresponding path program 1 times
[2023-11-29 06:57:34,969 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:57:34,969 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721316882]
[2023-11-29 06:57:34,969 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:57:34,969 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:57:35,513 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:57:35,513 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430242872]
[2023-11-29 06:57:35,514 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:57:35,514 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:57:35,514 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:57:35,515 INFO  L229       MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:57:35,515 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process
[2023-11-29 06:57:44,809 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:57:45,059 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37075 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:57:45,132 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:57:45,325 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked.
[2023-11-29 06:57:45,325 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:57:45,325 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:57:45,325 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721316882]
[2023-11-29 06:57:45,325 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:57:45,326 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430242872]
[2023-11-29 06:57:45,326 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [430242872] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:57:45,326 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:57:45,327 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:57:45,327 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056285345]
[2023-11-29 06:57:45,328 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:57:45,330 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:57:45,330 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:57:45,332 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:57:45,332 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:57:45,332 INFO  L87              Difference]: Start difference. First operand 6696 states and 11092 transitions. Second operand  has 7 states, 7 states have (on average 608.5714285714286) internal successors, (4260), 7 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:45,765 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:57:45,766 INFO  L93              Difference]: Finished difference Result 18815 states and 31156 transitions.
[2023-11-29 06:57:45,766 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:57:45,767 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 608.5714285714286) internal successors, (4260), 7 states have internal predecessors, (4260), 0 states have call successors, (0), 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 4455
[2023-11-29 06:57:45,772 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:57:45,781 INFO  L225             Difference]: With dead ends: 18815
[2023-11-29 06:57:45,781 INFO  L226             Difference]: Without dead ends: 12617
[2023-11-29 06:57:45,786 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4464 GetRequests, 4452 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:57:45,786 INFO  L413           NwaCegarLoop]: 10760 mSDtfsCounter, 29244 mSDsluCounter, 42534 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29244 SdHoareTripleChecker+Valid, 53294 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:57:45,786 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29244 Valid, 53294 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:57:45,796 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12617 states.
[2023-11-29 06:57:45,854 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12617 to 6698.
[2023-11-29 06:57:45,859 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6698 states, 6697 states have (on average 1.6565626399880544) internal successors, (11094), 6697 states have internal predecessors, (11094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:45,866 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6698 states to 6698 states and 11094 transitions.
[2023-11-29 06:57:45,867 INFO  L78                 Accepts]: Start accepts. Automaton has 6698 states and 11094 transitions. Word has length 4455
[2023-11-29 06:57:45,869 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:57:45,869 INFO  L495      AbstractCegarLoop]: Abstraction has 6698 states and 11094 transitions.
[2023-11-29 06:57:45,870 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 608.5714285714286) internal successors, (4260), 7 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:45,870 INFO  L276                IsEmpty]: Start isEmpty. Operand 6698 states and 11094 transitions.
[2023-11-29 06:57:45,947 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4457
[2023-11-29 06:57:45,947 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:57:45,948 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:57:46,060 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0
[2023-11-29 06:57:46,148 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49
[2023-11-29 06:57:46,148 INFO  L420      AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:57:46,149 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:57:46,149 INFO  L85        PathProgramCache]: Analyzing trace with hash 570972529, now seen corresponding path program 1 times
[2023-11-29 06:57:46,149 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:57:46,149 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597669464]
[2023-11-29 06:57:46,150 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:57:46,150 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:57:46,664 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:57:46,664 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295204391]
[2023-11-29 06:57:46,665 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:57:46,665 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:57:46,665 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:57:46,666 INFO  L229       MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:57:46,667 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process
[2023-11-29 06:57:55,810 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:57:56,059 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37078 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:57:56,137 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:57:56,364 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked.
[2023-11-29 06:57:56,364 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:57:56,364 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:57:56,364 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597669464]
[2023-11-29 06:57:56,364 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:57:56,364 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295204391]
[2023-11-29 06:57:56,364 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295204391] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:57:56,364 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:57:56,365 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:57:56,366 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009986137]
[2023-11-29 06:57:56,366 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:57:56,367 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:57:56,368 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:57:56,369 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:57:56,369 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:57:56,370 INFO  L87              Difference]: Start difference. First operand 6698 states and 11094 transitions. Second operand  has 7 states, 7 states have (on average 609.0) internal successors, (4263), 7 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:56,948 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:57:56,948 INFO  L93              Difference]: Finished difference Result 18821 states and 31162 transitions.
[2023-11-29 06:57:56,948 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:57:56,949 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 609.0) internal successors, (4263), 7 states have internal predecessors, (4263), 0 states have call successors, (0), 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 4456
[2023-11-29 06:57:56,952 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:57:56,961 INFO  L225             Difference]: With dead ends: 18821
[2023-11-29 06:57:56,961 INFO  L226             Difference]: Without dead ends: 12618
[2023-11-29 06:57:56,965 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4465 GetRequests, 4453 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:57:56,965 INFO  L413           NwaCegarLoop]: 10755 mSDtfsCounter, 29243 mSDsluCounter, 42519 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29243 SdHoareTripleChecker+Valid, 53274 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:57:56,965 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29243 Valid, 53274 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:57:56,975 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12618 states.
[2023-11-29 06:57:57,031 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12618 to 6700.
[2023-11-29 06:57:57,036 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6700 states, 6699 states have (on average 1.6563666218838633) internal successors, (11096), 6699 states have internal predecessors, (11096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:57,042 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 11096 transitions.
[2023-11-29 06:57:57,042 INFO  L78                 Accepts]: Start accepts. Automaton has 6700 states and 11096 transitions. Word has length 4456
[2023-11-29 06:57:57,044 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:57:57,044 INFO  L495      AbstractCegarLoop]: Abstraction has 6700 states and 11096 transitions.
[2023-11-29 06:57:57,045 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 609.0) internal successors, (4263), 7 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:57:57,045 INFO  L276                IsEmpty]: Start isEmpty. Operand 6700 states and 11096 transitions.
[2023-11-29 06:57:57,120 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4458
[2023-11-29 06:57:57,121 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:57:57,121 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:57:57,224 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0
[2023-11-29 06:57:57,322 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:57:57,322 INFO  L420      AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:57:57,322 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:57:57,323 INFO  L85        PathProgramCache]: Analyzing trace with hash 511011849, now seen corresponding path program 1 times
[2023-11-29 06:57:57,323 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:57:57,323 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226008215]
[2023-11-29 06:57:57,323 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:57:57,323 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:57:57,834 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:57:57,834 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553481139]
[2023-11-29 06:57:57,835 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:57:57,835 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:57:57,835 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:57:57,836 INFO  L229       MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:57:57,837 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process
[2023-11-29 06:58:06,839 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:58:07,089 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37081 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:58:07,170 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:58:07,370 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked.
[2023-11-29 06:58:07,370 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:58:07,371 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:58:07,371 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226008215]
[2023-11-29 06:58:07,371 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:58:07,371 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553481139]
[2023-11-29 06:58:07,371 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553481139] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:58:07,371 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:58:07,373 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:58:07,373 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578262927]
[2023-11-29 06:58:07,373 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:58:07,375 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:58:07,375 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:58:07,377 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:58:07,377 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:58:07,377 INFO  L87              Difference]: Start difference. First operand 6700 states and 11096 transitions. Second operand  has 7 states, 7 states have (on average 609.4285714285714) internal successors, (4266), 7 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:07,804 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:58:07,804 INFO  L93              Difference]: Finished difference Result 18827 states and 31168 transitions.
[2023-11-29 06:58:07,804 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:58:07,805 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 609.4285714285714) internal successors, (4266), 7 states have internal predecessors, (4266), 0 states have call successors, (0), 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 4457
[2023-11-29 06:58:07,808 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:58:07,817 INFO  L225             Difference]: With dead ends: 18827
[2023-11-29 06:58:07,817 INFO  L226             Difference]: Without dead ends: 12619
[2023-11-29 06:58:07,821 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4466 GetRequests, 4454 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:58:07,822 INFO  L413           NwaCegarLoop]: 10750 mSDtfsCounter, 29242 mSDsluCounter, 42504 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29242 SdHoareTripleChecker+Valid, 53254 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:58:07,822 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29242 Valid, 53254 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:58:07,834 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12619 states.
[2023-11-29 06:58:07,888 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12619 to 6702.
[2023-11-29 06:58:07,893 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6702 states, 6701 states have (on average 1.6561707207879421) internal successors, (11098), 6701 states have internal predecessors, (11098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:07,900 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6702 states to 6702 states and 11098 transitions.
[2023-11-29 06:58:07,900 INFO  L78                 Accepts]: Start accepts. Automaton has 6702 states and 11098 transitions. Word has length 4457
[2023-11-29 06:58:07,902 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:58:07,902 INFO  L495      AbstractCegarLoop]: Abstraction has 6702 states and 11098 transitions.
[2023-11-29 06:58:07,902 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 609.4285714285714) internal successors, (4266), 7 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:07,903 INFO  L276                IsEmpty]: Start isEmpty. Operand 6702 states and 11098 transitions.
[2023-11-29 06:58:07,978 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4459
[2023-11-29 06:58:07,978 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:58:07,979 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:58:08,079 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0
[2023-11-29 06:58:08,179 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:58:08,179 INFO  L420      AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:58:08,180 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:58:08,180 INFO  L85        PathProgramCache]: Analyzing trace with hash 1177409047, now seen corresponding path program 1 times
[2023-11-29 06:58:08,180 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:58:08,180 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998718573]
[2023-11-29 06:58:08,181 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:58:08,181 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:58:08,694 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:58:08,694 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636665198]
[2023-11-29 06:58:08,695 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:58:08,695 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:58:08,695 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:58:08,696 INFO  L229       MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:58:08,697 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process
[2023-11-29 06:58:18,010 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:58:18,247 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37084 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:58:18,319 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:58:18,529 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked.
[2023-11-29 06:58:18,530 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:58:18,530 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:58:18,530 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998718573]
[2023-11-29 06:58:18,530 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:58:18,530 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636665198]
[2023-11-29 06:58:18,530 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636665198] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:58:18,530 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:58:18,531 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:58:18,531 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056762796]
[2023-11-29 06:58:18,532 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:58:18,533 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:58:18,533 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:58:18,535 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:58:18,535 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:58:18,536 INFO  L87              Difference]: Start difference. First operand 6702 states and 11098 transitions. Second operand  has 7 states, 7 states have (on average 609.8571428571429) internal successors, (4269), 7 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:18,974 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:58:18,975 INFO  L93              Difference]: Finished difference Result 18833 states and 31174 transitions.
[2023-11-29 06:58:18,975 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:58:18,976 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 609.8571428571429) internal successors, (4269), 7 states have internal predecessors, (4269), 0 states have call successors, (0), 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 4458
[2023-11-29 06:58:18,979 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:58:18,988 INFO  L225             Difference]: With dead ends: 18833
[2023-11-29 06:58:18,988 INFO  L226             Difference]: Without dead ends: 12620
[2023-11-29 06:58:18,993 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4467 GetRequests, 4455 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:58:18,993 INFO  L413           NwaCegarLoop]: 10745 mSDtfsCounter, 29241 mSDsluCounter, 42489 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29241 SdHoareTripleChecker+Valid, 53234 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:58:18,994 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29241 Valid, 53234 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:58:19,004 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12620 states.
[2023-11-29 06:58:19,068 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12620 to 6704.
[2023-11-29 06:58:19,074 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6704 states, 6703 states have (on average 1.6559749365955543) internal successors, (11100), 6703 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:19,081 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6704 states to 6704 states and 11100 transitions.
[2023-11-29 06:58:19,081 INFO  L78                 Accepts]: Start accepts. Automaton has 6704 states and 11100 transitions. Word has length 4458
[2023-11-29 06:58:19,083 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:58:19,084 INFO  L495      AbstractCegarLoop]: Abstraction has 6704 states and 11100 transitions.
[2023-11-29 06:58:19,085 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 609.8571428571429) internal successors, (4269), 7 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:19,085 INFO  L276                IsEmpty]: Start isEmpty. Operand 6704 states and 11100 transitions.
[2023-11-29 06:58:19,161 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4460
[2023-11-29 06:58:19,162 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:58:19,162 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:58:19,273 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0
[2023-11-29 06:58:19,363 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:58:19,363 INFO  L420      AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:58:19,363 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:58:19,364 INFO  L85        PathProgramCache]: Analyzing trace with hash 1939604325, now seen corresponding path program 1 times
[2023-11-29 06:58:19,364 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:58:19,364 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435370886]
[2023-11-29 06:58:19,365 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:58:19,365 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:58:20,008 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:58:20,008 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462183613]
[2023-11-29 06:58:20,009 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:58:20,009 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:58:20,009 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:58:20,010 INFO  L229       MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:58:20,011 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process
[2023-11-29 06:58:29,201 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:58:29,442 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37088 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:58:29,517 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:58:29,728 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked.
[2023-11-29 06:58:29,728 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:58:29,729 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:58:29,729 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435370886]
[2023-11-29 06:58:29,729 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:58:29,729 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462183613]
[2023-11-29 06:58:29,729 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [462183613] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:58:29,729 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:58:29,730 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:58:29,730 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174575581]
[2023-11-29 06:58:29,731 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:58:29,733 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:58:29,733 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:58:29,735 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:58:29,735 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:58:29,736 INFO  L87              Difference]: Start difference. First operand 6704 states and 11100 transitions. Second operand  has 7 states, 7 states have (on average 610.2857142857143) internal successors, (4272), 7 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:30,161 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:58:30,161 INFO  L93              Difference]: Finished difference Result 18839 states and 31180 transitions.
[2023-11-29 06:58:30,162 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:58:30,163 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 610.2857142857143) internal successors, (4272), 7 states have internal predecessors, (4272), 0 states have call successors, (0), 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 4459
[2023-11-29 06:58:30,166 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:58:30,174 INFO  L225             Difference]: With dead ends: 18839
[2023-11-29 06:58:30,175 INFO  L226             Difference]: Without dead ends: 12621
[2023-11-29 06:58:30,179 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4468 GetRequests, 4456 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:58:30,179 INFO  L413           NwaCegarLoop]: 10740 mSDtfsCounter, 29240 mSDsluCounter, 42474 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29240 SdHoareTripleChecker+Valid, 53214 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:58:30,180 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29240 Valid, 53214 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:58:30,190 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12621 states.
[2023-11-29 06:58:30,249 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12621 to 6706.
[2023-11-29 06:58:30,255 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6706 states, 6705 states have (on average 1.655779269202088) internal successors, (11102), 6705 states have internal predecessors, (11102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:30,264 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6706 states to 6706 states and 11102 transitions.
[2023-11-29 06:58:30,264 INFO  L78                 Accepts]: Start accepts. Automaton has 6706 states and 11102 transitions. Word has length 4459
[2023-11-29 06:58:30,266 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:58:30,266 INFO  L495      AbstractCegarLoop]: Abstraction has 6706 states and 11102 transitions.
[2023-11-29 06:58:30,267 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 610.2857142857143) internal successors, (4272), 7 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:30,267 INFO  L276                IsEmpty]: Start isEmpty. Operand 6706 states and 11102 transitions.
[2023-11-29 06:58:30,344 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4461
[2023-11-29 06:58:30,344 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:58:30,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:58:30,456 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0
[2023-11-29 06:58:30,545 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:58:30,546 INFO  L420      AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:58:30,546 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:58:30,546 INFO  L85        PathProgramCache]: Analyzing trace with hash 198630847, now seen corresponding path program 1 times
[2023-11-29 06:58:30,546 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:58:30,547 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839716157]
[2023-11-29 06:58:30,548 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:58:30,548 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:58:31,094 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:58:31,094 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714492290]
[2023-11-29 06:58:31,095 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:58:31,095 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:58:31,095 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:58:31,096 INFO  L229       MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:58:31,097 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process
[2023-11-29 06:58:40,164 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:58:40,412 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37091 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:58:40,489 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:58:40,690 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked.
[2023-11-29 06:58:40,691 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:58:40,691 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:58:40,691 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839716157]
[2023-11-29 06:58:40,691 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:58:40,691 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714492290]
[2023-11-29 06:58:40,691 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714492290] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:58:40,691 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:58:40,692 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:58:40,692 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759320488]
[2023-11-29 06:58:40,692 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:58:40,694 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:58:40,694 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:58:40,696 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:58:40,697 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:58:40,698 INFO  L87              Difference]: Start difference. First operand 6706 states and 11102 transitions. Second operand  has 7 states, 7 states have (on average 610.7142857142857) internal successors, (4275), 7 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:41,260 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:58:41,261 INFO  L93              Difference]: Finished difference Result 18845 states and 31186 transitions.
[2023-11-29 06:58:41,261 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:58:41,262 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 610.7142857142857) internal successors, (4275), 7 states have internal predecessors, (4275), 0 states have call successors, (0), 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 4460
[2023-11-29 06:58:41,265 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:58:41,274 INFO  L225             Difference]: With dead ends: 18845
[2023-11-29 06:58:41,274 INFO  L226             Difference]: Without dead ends: 12622
[2023-11-29 06:58:41,278 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4469 GetRequests, 4457 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:58:41,279 INFO  L413           NwaCegarLoop]: 10735 mSDtfsCounter, 29239 mSDsluCounter, 42459 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29239 SdHoareTripleChecker+Valid, 53194 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:58:41,279 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29239 Valid, 53194 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:58:41,290 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12622 states.
[2023-11-29 06:58:41,349 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12622 to 6708.
[2023-11-29 06:58:41,355 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6708 states, 6707 states have (on average 1.6555837185030564) internal successors, (11104), 6707 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:41,362 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6708 states to 6708 states and 11104 transitions.
[2023-11-29 06:58:41,362 INFO  L78                 Accepts]: Start accepts. Automaton has 6708 states and 11104 transitions. Word has length 4460
[2023-11-29 06:58:41,364 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:58:41,364 INFO  L495      AbstractCegarLoop]: Abstraction has 6708 states and 11104 transitions.
[2023-11-29 06:58:41,365 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 610.7142857142857) internal successors, (4275), 7 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:41,365 INFO  L276                IsEmpty]: Start isEmpty. Operand 6708 states and 11104 transitions.
[2023-11-29 06:58:41,441 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4462
[2023-11-29 06:58:41,441 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:58:41,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:58:41,551 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0
[2023-11-29 06:58:41,642 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:58:41,643 INFO  L420      AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:58:41,643 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:58:41,643 INFO  L85        PathProgramCache]: Analyzing trace with hash -1299079233, now seen corresponding path program 1 times
[2023-11-29 06:58:41,643 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:58:41,644 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645981659]
[2023-11-29 06:58:41,645 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:58:41,645 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:58:42,176 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:58:42,176 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536370765]
[2023-11-29 06:58:42,177 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:58:42,177 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:58:42,177 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:58:42,178 INFO  L229       MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:58:42,179 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process
[2023-11-29 06:58:51,232 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:58:51,477 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37094 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:58:51,556 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:58:51,760 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked.
[2023-11-29 06:58:51,761 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:58:51,761 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:58:51,761 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645981659]
[2023-11-29 06:58:51,761 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:58:51,761 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536370765]
[2023-11-29 06:58:51,761 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536370765] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:58:51,761 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:58:51,762 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:58:51,762 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999866750]
[2023-11-29 06:58:51,762 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:58:51,764 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:58:51,764 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:58:51,766 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:58:51,766 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:58:51,768 INFO  L87              Difference]: Start difference. First operand 6708 states and 11104 transitions. Second operand  has 7 states, 7 states have (on average 611.1428571428571) internal successors, (4278), 7 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:52,208 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:58:52,208 INFO  L93              Difference]: Finished difference Result 18851 states and 31192 transitions.
[2023-11-29 06:58:52,209 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:58:52,210 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 611.1428571428571) internal successors, (4278), 7 states have internal predecessors, (4278), 0 states have call successors, (0), 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 4461
[2023-11-29 06:58:52,213 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:58:52,222 INFO  L225             Difference]: With dead ends: 18851
[2023-11-29 06:58:52,222 INFO  L226             Difference]: Without dead ends: 12623
[2023-11-29 06:58:52,227 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4470 GetRequests, 4458 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:58:52,227 INFO  L413           NwaCegarLoop]: 10730 mSDtfsCounter, 29238 mSDsluCounter, 42444 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29238 SdHoareTripleChecker+Valid, 53174 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:58:52,227 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29238 Valid, 53174 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:58:52,241 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12623 states.
[2023-11-29 06:58:52,316 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 6710.
[2023-11-29 06:58:52,321 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6710 states, 6709 states have (on average 1.6553882843940975) internal successors, (11106), 6709 states have internal predecessors, (11106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:52,328 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6710 states to 6710 states and 11106 transitions.
[2023-11-29 06:58:52,328 INFO  L78                 Accepts]: Start accepts. Automaton has 6710 states and 11106 transitions. Word has length 4461
[2023-11-29 06:58:52,330 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:58:52,330 INFO  L495      AbstractCegarLoop]: Abstraction has 6710 states and 11106 transitions.
[2023-11-29 06:58:52,331 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 611.1428571428571) internal successors, (4278), 7 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:58:52,331 INFO  L276                IsEmpty]: Start isEmpty. Operand 6710 states and 11106 transitions.
[2023-11-29 06:58:52,407 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4463
[2023-11-29 06:58:52,407 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:58:52,408 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:58:52,516 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0
[2023-11-29 06:58:52,609 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55
[2023-11-29 06:58:52,609 INFO  L420      AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:58:52,609 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:58:52,610 INFO  L85        PathProgramCache]: Analyzing trace with hash 1915944549, now seen corresponding path program 1 times
[2023-11-29 06:58:52,610 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:58:52,610 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537868084]
[2023-11-29 06:58:52,610 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:58:52,611 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:58:53,124 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:58:53,124 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566175042]
[2023-11-29 06:58:53,125 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:58:53,125 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:58:53,125 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:58:53,126 INFO  L229       MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:58:53,127 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process
[2023-11-29 06:59:02,835 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:59:03,080 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37097 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:59:03,156 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:59:03,364 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked.
[2023-11-29 06:59:03,364 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:59:03,364 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:59:03,364 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537868084]
[2023-11-29 06:59:03,364 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:59:03,364 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566175042]
[2023-11-29 06:59:03,365 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566175042] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:59:03,365 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:59:03,366 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:59:03,366 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884488455]
[2023-11-29 06:59:03,366 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:59:03,368 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:59:03,368 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:59:03,370 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:59:03,370 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:59:03,371 INFO  L87              Difference]: Start difference. First operand 6710 states and 11106 transitions. Second operand  has 7 states, 7 states have (on average 611.5714285714286) internal successors, (4281), 7 states have internal predecessors, (4281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:03,802 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:59:03,802 INFO  L93              Difference]: Finished difference Result 18857 states and 31198 transitions.
[2023-11-29 06:59:03,802 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:59:03,803 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 611.5714285714286) internal successors, (4281), 7 states have internal predecessors, (4281), 0 states have call successors, (0), 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 4462
[2023-11-29 06:59:03,807 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:59:03,816 INFO  L225             Difference]: With dead ends: 18857
[2023-11-29 06:59:03,816 INFO  L226             Difference]: Without dead ends: 12624
[2023-11-29 06:59:03,820 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4471 GetRequests, 4459 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:59:03,820 INFO  L413           NwaCegarLoop]: 10725 mSDtfsCounter, 29237 mSDsluCounter, 42429 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29237 SdHoareTripleChecker+Valid, 53154 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:59:03,821 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29237 Valid, 53154 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:59:03,831 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12624 states.
[2023-11-29 06:59:03,891 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12624 to 6712.
[2023-11-29 06:59:03,897 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6712 states, 6711 states have (on average 1.655192966770973) internal successors, (11108), 6711 states have internal predecessors, (11108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:03,905 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 11108 transitions.
[2023-11-29 06:59:03,906 INFO  L78                 Accepts]: Start accepts. Automaton has 6712 states and 11108 transitions. Word has length 4462
[2023-11-29 06:59:03,908 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:59:03,908 INFO  L495      AbstractCegarLoop]: Abstraction has 6712 states and 11108 transitions.
[2023-11-29 06:59:03,909 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 611.5714285714286) internal successors, (4281), 7 states have internal predecessors, (4281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:03,909 INFO  L276                IsEmpty]: Start isEmpty. Operand 6712 states and 11108 transitions.
[2023-11-29 06:59:03,991 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4464
[2023-11-29 06:59:03,991 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:59:03,992 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:59:04,099 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0
[2023-11-29 06:59:04,192 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56
[2023-11-29 06:59:04,193 INFO  L420      AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:59:04,193 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:59:04,193 INFO  L85        PathProgramCache]: Analyzing trace with hash -2141765605, now seen corresponding path program 1 times
[2023-11-29 06:59:04,193 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:59:04,193 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978726688]
[2023-11-29 06:59:04,194 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:59:04,194 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:59:04,834 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:59:04,834 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87943813]
[2023-11-29 06:59:04,835 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:59:04,835 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:59:04,835 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:59:04,836 INFO  L229       MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:59:04,837 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process
[2023-11-29 06:59:14,132 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:59:14,382 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37101 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:59:14,461 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:59:14,673 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked.
[2023-11-29 06:59:14,673 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:59:14,673 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:59:14,673 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978726688]
[2023-11-29 06:59:14,673 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:59:14,673 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87943813]
[2023-11-29 06:59:14,673 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [87943813] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:59:14,674 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:59:14,675 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:59:14,675 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833538329]
[2023-11-29 06:59:14,676 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:59:14,678 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:59:14,678 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:59:14,680 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:59:14,680 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:59:14,681 INFO  L87              Difference]: Start difference. First operand 6712 states and 11108 transitions. Second operand  has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:15,146 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:59:15,147 INFO  L93              Difference]: Finished difference Result 18863 states and 31204 transitions.
[2023-11-29 06:59:15,147 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:59:15,148 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 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 4463
[2023-11-29 06:59:15,151 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:59:15,160 INFO  L225             Difference]: With dead ends: 18863
[2023-11-29 06:59:15,160 INFO  L226             Difference]: Without dead ends: 12625
[2023-11-29 06:59:15,164 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4472 GetRequests, 4460 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:59:15,165 INFO  L413           NwaCegarLoop]: 10720 mSDtfsCounter, 29236 mSDsluCounter, 42414 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29236 SdHoareTripleChecker+Valid, 53134 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:59:15,165 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29236 Valid, 53134 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:59:15,180 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12625 states.
[2023-11-29 06:59:15,263 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12625 to 6714.
[2023-11-29 06:59:15,269 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6714 states, 6713 states have (on average 1.6549977655295696) internal successors, (11110), 6713 states have internal predecessors, (11110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:15,277 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6714 states to 6714 states and 11110 transitions.
[2023-11-29 06:59:15,278 INFO  L78                 Accepts]: Start accepts. Automaton has 6714 states and 11110 transitions. Word has length 4463
[2023-11-29 06:59:15,280 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:59:15,280 INFO  L495      AbstractCegarLoop]: Abstraction has 6714 states and 11110 transitions.
[2023-11-29 06:59:15,281 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 612.0) internal successors, (4284), 7 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:15,281 INFO  L276                IsEmpty]: Start isEmpty. Operand 6714 states and 11110 transitions.
[2023-11-29 06:59:15,363 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4465
[2023-11-29 06:59:15,363 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:59:15,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:59:15,477 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0
[2023-11-29 06:59:15,564 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57
[2023-11-29 06:59:15,565 INFO  L420      AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:59:15,565 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:59:15,565 INFO  L85        PathProgramCache]: Analyzing trace with hash 1379464973, now seen corresponding path program 1 times
[2023-11-29 06:59:15,566 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:59:15,566 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241311044]
[2023-11-29 06:59:15,566 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:59:15,566 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:59:16,154 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:59:16,154 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083242054]
[2023-11-29 06:59:16,155 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:59:16,155 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:59:16,156 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:59:16,156 INFO  L229       MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:59:16,157 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process
[2023-11-29 06:59:25,282 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:59:25,546 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37104 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 06:59:25,632 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:59:25,885 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked.
[2023-11-29 06:59:25,886 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:59:25,886 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:59:25,886 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241311044]
[2023-11-29 06:59:25,886 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:59:25,886 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083242054]
[2023-11-29 06:59:25,886 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083242054] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:59:25,886 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:59:25,888 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 06:59:25,888 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331271206]
[2023-11-29 06:59:25,888 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:59:25,890 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 06:59:25,890 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:59:25,892 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 06:59:25,892 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 06:59:25,893 INFO  L87              Difference]: Start difference. First operand 6714 states and 11110 transitions. Second operand  has 8 states, 8 states have (on average 535.875) internal successors, (4287), 8 states have internal predecessors, (4287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:26,628 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:59:26,628 INFO  L93              Difference]: Finished difference Result 18869 states and 31210 transitions.
[2023-11-29 06:59:26,628 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:59:26,629 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 535.875) internal successors, (4287), 8 states have internal predecessors, (4287), 0 states have call successors, (0), 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 4464
[2023-11-29 06:59:26,632 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:59:26,641 INFO  L225             Difference]: With dead ends: 18869
[2023-11-29 06:59:26,641 INFO  L226             Difference]: Without dead ends: 12626
[2023-11-29 06:59:26,645 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4473 GetRequests, 4460 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-29 06:59:26,645 INFO  L413           NwaCegarLoop]: 10715 mSDtfsCounter, 29235 mSDsluCounter, 53111 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29235 SdHoareTripleChecker+Valid, 63826 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-29 06:59:26,646 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29235 Valid, 63826 Invalid, 59 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-29 06:59:26,659 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12626 states.
[2023-11-29 06:59:26,725 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12626 to 6716.
[2023-11-29 06:59:26,732 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6716 states, 6715 states have (on average 1.6548026805658973) internal successors, (11112), 6715 states have internal predecessors, (11112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:26,740 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6716 states to 6716 states and 11112 transitions.
[2023-11-29 06:59:26,741 INFO  L78                 Accepts]: Start accepts. Automaton has 6716 states and 11112 transitions. Word has length 4464
[2023-11-29 06:59:26,743 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:59:26,743 INFO  L495      AbstractCegarLoop]: Abstraction has 6716 states and 11112 transitions.
[2023-11-29 06:59:26,744 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 535.875) internal successors, (4287), 8 states have internal predecessors, (4287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:26,744 INFO  L276                IsEmpty]: Start isEmpty. Operand 6716 states and 11112 transitions.
[2023-11-29 06:59:26,836 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4466
[2023-11-29 06:59:26,836 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:59:26,837 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:59:26,941 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0
[2023-11-29 06:59:27,037 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58
[2023-11-29 06:59:27,038 INFO  L420      AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:59:27,038 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:59:27,038 INFO  L85        PathProgramCache]: Analyzing trace with hash 193304693, now seen corresponding path program 1 times
[2023-11-29 06:59:27,038 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:59:27,039 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575127183]
[2023-11-29 06:59:27,039 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:59:27,039 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:59:27,575 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:59:27,576 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429677706]
[2023-11-29 06:59:27,576 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:59:27,577 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:59:27,577 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:59:27,577 INFO  L229       MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:59:27,578 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process
[2023-11-29 06:59:37,135 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:59:37,386 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37107 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:59:37,462 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:59:37,664 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked.
[2023-11-29 06:59:37,664 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:59:37,665 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:59:37,665 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575127183]
[2023-11-29 06:59:37,665 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:59:37,665 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429677706]
[2023-11-29 06:59:37,665 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429677706] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:59:37,665 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:59:37,667 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:59:37,667 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887111260]
[2023-11-29 06:59:37,667 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:59:37,669 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:59:37,669 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:59:37,671 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:59:37,671 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:59:37,672 INFO  L87              Difference]: Start difference. First operand 6716 states and 11112 transitions. Second operand  has 7 states, 7 states have (on average 612.8571428571429) internal successors, (4290), 7 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:38,125 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:59:38,125 INFO  L93              Difference]: Finished difference Result 18875 states and 31216 transitions.
[2023-11-29 06:59:38,125 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:59:38,126 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 612.8571428571429) internal successors, (4290), 7 states have internal predecessors, (4290), 0 states have call successors, (0), 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 4465
[2023-11-29 06:59:38,129 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:59:38,139 INFO  L225             Difference]: With dead ends: 18875
[2023-11-29 06:59:38,139 INFO  L226             Difference]: Without dead ends: 12627
[2023-11-29 06:59:38,144 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4474 GetRequests, 4462 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:59:38,144 INFO  L413           NwaCegarLoop]: 10710 mSDtfsCounter, 29234 mSDsluCounter, 42384 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29234 SdHoareTripleChecker+Valid, 53094 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:59:38,144 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29234 Valid, 53094 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:59:38,155 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12627 states.
[2023-11-29 06:59:38,220 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12627 to 6718.
[2023-11-29 06:59:38,226 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6718 states, 6717 states have (on average 1.6546077117760905) internal successors, (11114), 6717 states have internal predecessors, (11114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:38,234 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6718 states to 6718 states and 11114 transitions.
[2023-11-29 06:59:38,234 INFO  L78                 Accepts]: Start accepts. Automaton has 6718 states and 11114 transitions. Word has length 4465
[2023-11-29 06:59:38,237 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:59:38,237 INFO  L495      AbstractCegarLoop]: Abstraction has 6718 states and 11114 transitions.
[2023-11-29 06:59:38,238 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 612.8571428571429) internal successors, (4290), 7 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:38,238 INFO  L276                IsEmpty]: Start isEmpty. Operand 6718 states and 11114 transitions.
[2023-11-29 06:59:38,319 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4467
[2023-11-29 06:59:38,319 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:59:38,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:59:38,432 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0
[2023-11-29 06:59:38,520 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59
[2023-11-29 06:59:38,520 INFO  L420      AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:59:38,521 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:59:38,521 INFO  L85        PathProgramCache]: Analyzing trace with hash -319341645, now seen corresponding path program 1 times
[2023-11-29 06:59:38,521 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:59:38,521 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743674563]
[2023-11-29 06:59:38,522 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:59:38,522 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:59:39,051 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:59:39,052 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667541254]
[2023-11-29 06:59:39,052 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:59:39,053 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:59:39,053 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:59:39,053 INFO  L229       MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:59:39,054 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process
[2023-11-29 06:59:48,443 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:59:48,683 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37110 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 06:59:48,758 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:59:48,991 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked.
[2023-11-29 06:59:48,991 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:59:48,991 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:59:48,991 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743674563]
[2023-11-29 06:59:48,991 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:59:48,991 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667541254]
[2023-11-29 06:59:48,991 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [667541254] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:59:48,991 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:59:48,993 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 06:59:48,993 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250356278]
[2023-11-29 06:59:48,993 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:59:48,995 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:59:48,995 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:59:48,997 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:59:48,997 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:59:48,998 INFO  L87              Difference]: Start difference. First operand 6718 states and 11114 transitions. Second operand  has 7 states, 7 states have (on average 613.2857142857143) internal successors, (4293), 7 states have internal predecessors, (4293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:49,475 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:59:49,476 INFO  L93              Difference]: Finished difference Result 18881 states and 31222 transitions.
[2023-11-29 06:59:49,476 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 06:59:49,477 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 613.2857142857143) internal successors, (4293), 7 states have internal predecessors, (4293), 0 states have call successors, (0), 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 4466
[2023-11-29 06:59:49,480 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:59:49,490 INFO  L225             Difference]: With dead ends: 18881
[2023-11-29 06:59:49,490 INFO  L226             Difference]: Without dead ends: 12628
[2023-11-29 06:59:49,495 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4475 GetRequests, 4463 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 06:59:49,495 INFO  L413           NwaCegarLoop]: 10705 mSDtfsCounter, 29233 mSDsluCounter, 42369 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29233 SdHoareTripleChecker+Valid, 53074 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 06:59:49,495 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29233 Valid, 53074 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 06:59:49,506 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12628 states.
[2023-11-29 06:59:49,572 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12628 to 6720.
[2023-11-29 06:59:49,578 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6720 states, 6719 states have (on average 1.6544128590564071) internal successors, (11116), 6719 states have internal predecessors, (11116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:49,586 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6720 states to 6720 states and 11116 transitions.
[2023-11-29 06:59:49,586 INFO  L78                 Accepts]: Start accepts. Automaton has 6720 states and 11116 transitions. Word has length 4466
[2023-11-29 06:59:49,588 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:59:49,588 INFO  L495      AbstractCegarLoop]: Abstraction has 6720 states and 11116 transitions.
[2023-11-29 06:59:49,589 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 613.2857142857143) internal successors, (4293), 7 states have internal predecessors, (4293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:59:49,590 INFO  L276                IsEmpty]: Start isEmpty. Operand 6720 states and 11116 transitions.
[2023-11-29 06:59:49,671 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4468
[2023-11-29 06:59:49,671 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:59:49,672 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:59:49,785 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0
[2023-11-29 06:59:49,873 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:59:49,873 INFO  L420      AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:59:49,873 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:59:49,874 INFO  L85        PathProgramCache]: Analyzing trace with hash -1278000687, now seen corresponding path program 1 times
[2023-11-29 06:59:49,874 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:59:49,874 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076617352]
[2023-11-29 06:59:49,874 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:59:49,874 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:59:50,480 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:59:50,480 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108331465]
[2023-11-29 06:59:50,481 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:59:50,481 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:59:50,481 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:59:50,482 INFO  L229       MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:59:50,483 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process
[2023-11-29 07:00:00,223 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 07:00:00,475 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37114 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 07:00:00,552 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 07:00:00,759 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked.
[2023-11-29 07:00:00,759 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 07:00:00,759 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 07:00:00,759 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076617352]
[2023-11-29 07:00:00,759 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 07:00:00,759 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108331465]
[2023-11-29 07:00:00,759 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108331465] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 07:00:00,759 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 07:00:00,760 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 07:00:00,761 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30187077]
[2023-11-29 07:00:00,761 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 07:00:00,762 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 07:00:00,763 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 07:00:00,764 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 07:00:00,764 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 07:00:00,765 INFO  L87              Difference]: Start difference. First operand 6720 states and 11116 transitions. Second operand  has 7 states, 7 states have (on average 613.7142857142857) internal successors, (4296), 7 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:01,202 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 07:00:01,202 INFO  L93              Difference]: Finished difference Result 18887 states and 31228 transitions.
[2023-11-29 07:00:01,203 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 07:00:01,204 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 613.7142857142857) internal successors, (4296), 7 states have internal predecessors, (4296), 0 states have call successors, (0), 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 4467
[2023-11-29 07:00:01,207 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 07:00:01,216 INFO  L225             Difference]: With dead ends: 18887
[2023-11-29 07:00:01,217 INFO  L226             Difference]: Without dead ends: 12629
[2023-11-29 07:00:01,222 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4476 GetRequests, 4464 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 07:00:01,222 INFO  L413           NwaCegarLoop]: 10700 mSDtfsCounter, 29232 mSDsluCounter, 42354 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29232 SdHoareTripleChecker+Valid, 53054 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 07:00:01,222 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29232 Valid, 53054 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 07:00:01,235 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12629 states.
[2023-11-29 07:00:01,306 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12629 to 6722.
[2023-11-29 07:00:01,312 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6722 states, 6721 states have (on average 1.6542181223032286) internal successors, (11118), 6721 states have internal predecessors, (11118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:01,320 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 11118 transitions.
[2023-11-29 07:00:01,320 INFO  L78                 Accepts]: Start accepts. Automaton has 6722 states and 11118 transitions. Word has length 4467
[2023-11-29 07:00:01,323 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 07:00:01,323 INFO  L495      AbstractCegarLoop]: Abstraction has 6722 states and 11118 transitions.
[2023-11-29 07:00:01,324 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 613.7142857142857) internal successors, (4296), 7 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:01,324 INFO  L276                IsEmpty]: Start isEmpty. Operand 6722 states and 11118 transitions.
[2023-11-29 07:00:01,410 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4469
[2023-11-29 07:00:01,410 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 07:00:01,411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 07:00:01,529 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0
[2023-11-29 07:00:01,611 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 07:00:01,612 INFO  L420      AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 07:00:01,612 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 07:00:01,613 INFO  L85        PathProgramCache]: Analyzing trace with hash 2132419931, now seen corresponding path program 1 times
[2023-11-29 07:00:01,613 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 07:00:01,613 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151817659]
[2023-11-29 07:00:01,614 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 07:00:01,614 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 07:00:02,207 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 07:00:02,207 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561279049]
[2023-11-29 07:00:02,208 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 07:00:02,208 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 07:00:02,208 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 07:00:02,209 INFO  L229       MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 07:00:02,210 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process
[2023-11-29 07:00:12,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 07:00:12,587 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37117 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 07:00:12,672 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 07:00:13,137 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked.
[2023-11-29 07:00:13,137 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 07:00:13,137 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 07:00:13,137 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151817659]
[2023-11-29 07:00:13,137 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 07:00:13,137 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561279049]
[2023-11-29 07:00:13,138 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561279049] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 07:00:13,138 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 07:00:13,139 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 07:00:13,140 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809794534]
[2023-11-29 07:00:13,140 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 07:00:13,143 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 07:00:13,144 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 07:00:13,147 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 07:00:13,147 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 07:00:13,149 INFO  L87              Difference]: Start difference. First operand 6722 states and 11118 transitions. Second operand  has 7 states, 7 states have (on average 614.1428571428571) internal successors, (4299), 7 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:13,660 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 07:00:13,660 INFO  L93              Difference]: Finished difference Result 18893 states and 31234 transitions.
[2023-11-29 07:00:13,660 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 07:00:13,661 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 614.1428571428571) internal successors, (4299), 7 states have internal predecessors, (4299), 0 states have call successors, (0), 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 4468
[2023-11-29 07:00:13,665 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 07:00:13,675 INFO  L225             Difference]: With dead ends: 18893
[2023-11-29 07:00:13,675 INFO  L226             Difference]: Without dead ends: 12630
[2023-11-29 07:00:13,680 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4477 GetRequests, 4465 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 07:00:13,680 INFO  L413           NwaCegarLoop]: 10695 mSDtfsCounter, 29231 mSDsluCounter, 42339 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29231 SdHoareTripleChecker+Valid, 53034 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 07:00:13,681 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29231 Valid, 53034 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 07:00:13,693 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12630 states.
[2023-11-29 07:00:13,764 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12630 to 6724.
[2023-11-29 07:00:13,771 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6724 states, 6723 states have (on average 1.6540235014130595) internal successors, (11120), 6723 states have internal predecessors, (11120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:13,779 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 11120 transitions.
[2023-11-29 07:00:13,779 INFO  L78                 Accepts]: Start accepts. Automaton has 6724 states and 11120 transitions. Word has length 4468
[2023-11-29 07:00:13,782 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 07:00:13,782 INFO  L495      AbstractCegarLoop]: Abstraction has 6724 states and 11120 transitions.
[2023-11-29 07:00:13,783 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 614.1428571428571) internal successors, (4299), 7 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:13,783 INFO  L276                IsEmpty]: Start isEmpty. Operand 6724 states and 11120 transitions.
[2023-11-29 07:00:13,875 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4470
[2023-11-29 07:00:13,875 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 07:00:13,876 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 07:00:13,995 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0
[2023-11-29 07:00:14,077 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62
[2023-11-29 07:00:14,077 INFO  L420      AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 07:00:14,077 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 07:00:14,078 INFO  L85        PathProgramCache]: Analyzing trace with hash 1536087595, now seen corresponding path program 1 times
[2023-11-29 07:00:14,078 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 07:00:14,078 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114182416]
[2023-11-29 07:00:14,079 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 07:00:14,079 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 07:00:14,695 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 07:00:14,696 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436089366]
[2023-11-29 07:00:14,697 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 07:00:14,697 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 07:00:14,697 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 07:00:14,698 INFO  L229       MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 07:00:14,699 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process
[2023-11-29 07:00:24,991 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 07:00:25,264 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37120 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 07:00:25,351 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 07:00:25,578 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked.
[2023-11-29 07:00:25,578 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 07:00:25,578 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 07:00:25,578 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114182416]
[2023-11-29 07:00:25,578 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 07:00:25,578 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436089366]
[2023-11-29 07:00:25,578 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [436089366] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 07:00:25,578 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 07:00:25,580 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 07:00:25,580 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868088563]
[2023-11-29 07:00:25,580 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 07:00:25,582 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 07:00:25,582 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 07:00:25,585 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 07:00:25,585 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 07:00:25,586 INFO  L87              Difference]: Start difference. First operand 6724 states and 11120 transitions. Second operand  has 7 states, 7 states have (on average 614.5714285714286) internal successors, (4302), 7 states have internal predecessors, (4302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:26,097 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 07:00:26,097 INFO  L93              Difference]: Finished difference Result 18899 states and 31240 transitions.
[2023-11-29 07:00:26,098 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 07:00:26,099 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 614.5714285714286) internal successors, (4302), 7 states have internal predecessors, (4302), 0 states have call successors, (0), 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 4469
[2023-11-29 07:00:26,103 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 07:00:26,113 INFO  L225             Difference]: With dead ends: 18899
[2023-11-29 07:00:26,113 INFO  L226             Difference]: Without dead ends: 12631
[2023-11-29 07:00:26,118 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4478 GetRequests, 4466 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 07:00:26,119 INFO  L413           NwaCegarLoop]: 10690 mSDtfsCounter, 29230 mSDsluCounter, 42324 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29230 SdHoareTripleChecker+Valid, 53014 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 07:00:26,119 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29230 Valid, 53014 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 07:00:26,132 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12631 states.
[2023-11-29 07:00:26,208 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 6726.
[2023-11-29 07:00:26,215 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6726 states, 6725 states have (on average 1.6538289962825279) internal successors, (11122), 6725 states have internal predecessors, (11122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:26,224 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6726 states to 6726 states and 11122 transitions.
[2023-11-29 07:00:26,224 INFO  L78                 Accepts]: Start accepts. Automaton has 6726 states and 11122 transitions. Word has length 4469
[2023-11-29 07:00:26,226 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 07:00:26,227 INFO  L495      AbstractCegarLoop]: Abstraction has 6726 states and 11122 transitions.
[2023-11-29 07:00:26,228 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 614.5714285714286) internal successors, (4302), 7 states have internal predecessors, (4302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:26,228 INFO  L276                IsEmpty]: Start isEmpty. Operand 6726 states and 11122 transitions.
[2023-11-29 07:00:26,322 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4471
[2023-11-29 07:00:26,322 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 07:00:26,323 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 07:00:26,447 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0
[2023-11-29 07:00:26,524 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63
[2023-11-29 07:00:26,524 INFO  L420      AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 07:00:26,525 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 07:00:26,525 INFO  L85        PathProgramCache]: Analyzing trace with hash 2120617473, now seen corresponding path program 1 times
[2023-11-29 07:00:26,525 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 07:00:26,525 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23646740]
[2023-11-29 07:00:26,527 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 07:00:26,527 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 07:00:27,202 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 07:00:27,202 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569616588]
[2023-11-29 07:00:27,203 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 07:00:27,203 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 07:00:27,204 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 07:00:27,204 INFO  L229       MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 07:00:27,205 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process
[2023-11-29 07:00:37,472 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 07:00:37,738 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37123 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 07:00:37,824 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 07:00:38,049 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked.
[2023-11-29 07:00:38,050 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 07:00:38,050 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 07:00:38,050 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23646740]
[2023-11-29 07:00:38,050 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 07:00:38,050 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569616588]
[2023-11-29 07:00:38,050 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569616588] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 07:00:38,050 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 07:00:38,052 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 07:00:38,052 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134461999]
[2023-11-29 07:00:38,052 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 07:00:38,055 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 07:00:38,055 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 07:00:38,057 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 07:00:38,057 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 07:00:38,059 INFO  L87              Difference]: Start difference. First operand 6726 states and 11122 transitions. Second operand  has 7 states, 7 states have (on average 615.0) internal successors, (4305), 7 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:38,521 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 07:00:38,521 INFO  L93              Difference]: Finished difference Result 18905 states and 31246 transitions.
[2023-11-29 07:00:38,522 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 07:00:38,523 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 615.0) internal successors, (4305), 7 states have internal predecessors, (4305), 0 states have call successors, (0), 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 4470
[2023-11-29 07:00:38,526 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 07:00:38,535 INFO  L225             Difference]: With dead ends: 18905
[2023-11-29 07:00:38,536 INFO  L226             Difference]: Without dead ends: 12632
[2023-11-29 07:00:38,541 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4479 GetRequests, 4467 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 07:00:38,541 INFO  L413           NwaCegarLoop]: 10685 mSDtfsCounter, 29229 mSDsluCounter, 42309 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29229 SdHoareTripleChecker+Valid, 52994 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 07:00:38,541 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29229 Valid, 52994 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 07:00:38,553 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12632 states.
[2023-11-29 07:00:38,621 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12632 to 6728.
[2023-11-29 07:00:38,627 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6728 states, 6727 states have (on average 1.653634606808384) internal successors, (11124), 6727 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:38,636 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6728 states to 6728 states and 11124 transitions.
[2023-11-29 07:00:38,636 INFO  L78                 Accepts]: Start accepts. Automaton has 6728 states and 11124 transitions. Word has length 4470
[2023-11-29 07:00:38,638 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 07:00:38,638 INFO  L495      AbstractCegarLoop]: Abstraction has 6728 states and 11124 transitions.
[2023-11-29 07:00:38,639 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 615.0) internal successors, (4305), 7 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:38,639 INFO  L276                IsEmpty]: Start isEmpty. Operand 6728 states and 11124 transitions.
[2023-11-29 07:00:38,727 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4472
[2023-11-29 07:00:38,727 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 07:00:38,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 07:00:38,847 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0
[2023-11-29 07:00:38,928 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64
[2023-11-29 07:00:38,929 INFO  L420      AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 07:00:38,929 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 07:00:38,930 INFO  L85        PathProgramCache]: Analyzing trace with hash 1871546503, now seen corresponding path program 1 times
[2023-11-29 07:00:38,930 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 07:00:38,930 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278659884]
[2023-11-29 07:00:38,931 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 07:00:38,932 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 07:00:39,541 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 07:00:39,542 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031464685]
[2023-11-29 07:00:39,542 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 07:00:39,543 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 07:00:39,543 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 07:00:39,544 INFO  L229       MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 07:00:39,545 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process
[2023-11-29 07:00:49,632 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 07:00:49,875 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37127 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 07:00:49,948 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 07:00:50,141 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked.
[2023-11-29 07:00:50,141 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 07:00:50,142 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 07:00:50,142 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278659884]
[2023-11-29 07:00:50,142 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 07:00:50,142 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031464685]
[2023-11-29 07:00:50,142 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031464685] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 07:00:50,142 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 07:00:50,144 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 07:00:50,144 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638507898]
[2023-11-29 07:00:50,144 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 07:00:50,146 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 07:00:50,146 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 07:00:50,148 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 07:00:50,148 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 07:00:50,149 INFO  L87              Difference]: Start difference. First operand 6728 states and 11124 transitions. Second operand  has 7 states, 7 states have (on average 615.4285714285714) internal successors, (4308), 7 states have internal predecessors, (4308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:50,607 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 07:00:50,607 INFO  L93              Difference]: Finished difference Result 18911 states and 31252 transitions.
[2023-11-29 07:00:50,607 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 07:00:50,608 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 615.4285714285714) internal successors, (4308), 7 states have internal predecessors, (4308), 0 states have call successors, (0), 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 4471
[2023-11-29 07:00:50,611 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 07:00:50,621 INFO  L225             Difference]: With dead ends: 18911
[2023-11-29 07:00:50,621 INFO  L226             Difference]: Without dead ends: 12633
[2023-11-29 07:00:50,626 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4480 GetRequests, 4468 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 07:00:50,627 INFO  L413           NwaCegarLoop]: 10680 mSDtfsCounter, 29228 mSDsluCounter, 42294 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29228 SdHoareTripleChecker+Valid, 52974 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 07:00:50,627 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29228 Valid, 52974 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 07:00:50,639 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12633 states.
[2023-11-29 07:00:50,711 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12633 to 6730.
[2023-11-29 07:00:50,717 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6730 states, 6729 states have (on average 1.6534403328875018) internal successors, (11126), 6729 states have internal predecessors, (11126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:50,726 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6730 states to 6730 states and 11126 transitions.
[2023-11-29 07:00:50,726 INFO  L78                 Accepts]: Start accepts. Automaton has 6730 states and 11126 transitions. Word has length 4471
[2023-11-29 07:00:50,728 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 07:00:50,729 INFO  L495      AbstractCegarLoop]: Abstraction has 6730 states and 11126 transitions.
[2023-11-29 07:00:50,730 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 615.4285714285714) internal successors, (4308), 7 states have internal predecessors, (4308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:00:50,730 INFO  L276                IsEmpty]: Start isEmpty. Operand 6730 states and 11126 transitions.
[2023-11-29 07:00:50,820 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4473
[2023-11-29 07:00:50,820 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 07:00:50,821 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 07:00:50,940 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0
[2023-11-29 07:00:51,021 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65
[2023-11-29 07:00:51,022 INFO  L420      AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 07:00:51,022 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 07:00:51,023 INFO  L85        PathProgramCache]: Analyzing trace with hash -1918506839, now seen corresponding path program 1 times
[2023-11-29 07:00:51,023 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 07:00:51,024 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650435794]
[2023-11-29 07:00:51,024 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 07:00:51,024 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 07:00:51,616 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 07:00:51,616 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916693190]
[2023-11-29 07:00:51,617 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 07:00:51,617 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 07:00:51,617 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 07:00:51,618 INFO  L229       MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 07:00:51,619 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process
[2023-11-29 07:01:01,397 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 07:01:01,639 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37130 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 07:01:01,721 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 07:01:01,923 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked.
[2023-11-29 07:01:01,923 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 07:01:01,923 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 07:01:01,923 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650435794]
[2023-11-29 07:01:01,924 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 07:01:01,924 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916693190]
[2023-11-29 07:01:01,924 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916693190] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 07:01:01,924 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 07:01:01,926 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 07:01:01,926 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413809378]
[2023-11-29 07:01:01,926 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 07:01:01,928 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 07:01:01,928 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 07:01:01,929 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 07:01:01,929 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 07:01:01,930 INFO  L87              Difference]: Start difference. First operand 6730 states and 11126 transitions. Second operand  has 7 states, 7 states have (on average 616.1428571428571) internal successors, (4313), 7 states have internal predecessors, (4313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:01:02,369 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 07:01:02,369 INFO  L93              Difference]: Finished difference Result 18920 states and 31263 transitions.
[2023-11-29 07:01:02,369 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-29 07:01:02,370 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 616.1428571428571) internal successors, (4313), 7 states have internal predecessors, (4313), 0 states have call successors, (0), 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 4472
[2023-11-29 07:01:02,373 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 07:01:02,382 INFO  L225             Difference]: With dead ends: 18920
[2023-11-29 07:01:02,382 INFO  L226             Difference]: Without dead ends: 12637
[2023-11-29 07:01:02,386 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4481 GetRequests, 4469 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-29 07:01:02,387 INFO  L413           NwaCegarLoop]: 10670 mSDtfsCounter, 29230 mSDsluCounter, 42264 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29230 SdHoareTripleChecker+Valid, 52934 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 07:01:02,387 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29230 Valid, 52934 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 07:01:02,397 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12637 states.
[2023-11-29 07:01:02,453 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12637 to 6735.
[2023-11-29 07:01:02,459 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6735 states, 6734 states have (on average 1.6532521532521534) internal successors, (11133), 6734 states have internal predecessors, (11133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:01:02,466 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6735 states to 6735 states and 11133 transitions.
[2023-11-29 07:01:02,466 INFO  L78                 Accepts]: Start accepts. Automaton has 6735 states and 11133 transitions. Word has length 4472
[2023-11-29 07:01:02,468 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 07:01:02,468 INFO  L495      AbstractCegarLoop]: Abstraction has 6735 states and 11133 transitions.
[2023-11-29 07:01:02,469 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 616.1428571428571) internal successors, (4313), 7 states have internal predecessors, (4313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:01:02,469 INFO  L276                IsEmpty]: Start isEmpty. Operand 6735 states and 11133 transitions.
[2023-11-29 07:01:02,546 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4474
[2023-11-29 07:01:02,546 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 07:01:02,547 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 07:01:02,651 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0
[2023-11-29 07:01:02,747 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66
[2023-11-29 07:01:02,747 INFO  L420      AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 07:01:02,748 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 07:01:02,748 INFO  L85        PathProgramCache]: Analyzing trace with hash -1432779141, now seen corresponding path program 1 times
[2023-11-29 07:01:02,748 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 07:01:02,748 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641633752]
[2023-11-29 07:01:02,749 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 07:01:02,749 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 07:01:03,268 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 07:01:03,268 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203152169]
[2023-11-29 07:01:03,269 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 07:01:03,269 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 07:01:03,269 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 07:01:03,270 INFO  L229       MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 07:01:03,271 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process
[2023-11-29 07:01:12,726 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 07:01:12,971 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37133 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 07:01:13,050 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 07:01:13,256 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked.
[2023-11-29 07:01:13,256 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 07:01:13,256 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 07:01:13,256 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641633752]
[2023-11-29 07:01:13,257 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 07:01:13,257 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203152169]
[2023-11-29 07:01:13,257 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203152169] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 07:01:13,257 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 07:01:13,258 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 07:01:13,259 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432553800]
[2023-11-29 07:01:13,259 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 07:01:13,261 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 07:01:13,261 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 07:01:13,263 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 07:01:13,263 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-29 07:01:13,264 INFO  L87              Difference]: Start difference. First operand 6735 states and 11133 transitions. Second operand  has 8 states, 8 states have (on average 539.125) internal successors, (4313), 8 states have internal predecessors, (4313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:01:13,782 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 07:01:13,782 INFO  L93              Difference]: Finished difference Result 18926 states and 31269 transitions.
[2023-11-29 07:01:13,783 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 07:01:13,784 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 539.125) internal successors, (4313), 8 states have internal predecessors, (4313), 0 states have call successors, (0), 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 4473
[2023-11-29 07:01:13,787 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 07:01:13,796 INFO  L225             Difference]: With dead ends: 18926
[2023-11-29 07:01:13,797 INFO  L226             Difference]: Without dead ends: 12638
[2023-11-29 07:01:13,802 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4481 GetRequests, 4469 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-29 07:01:13,802 INFO  L413           NwaCegarLoop]: 10671 mSDtfsCounter, 29222 mSDsluCounter, 52927 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29222 SdHoareTripleChecker+Valid, 63598 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-29 07:01:13,802 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29222 Valid, 63598 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-29 07:01:13,813 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12638 states.
[2023-11-29 07:01:13,875 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12638 to 6735.
[2023-11-29 07:01:13,881 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6735 states, 6734 states have (on average 1.6532521532521534) internal successors, (11133), 6734 states have internal predecessors, (11133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:01:13,888 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6735 states to 6735 states and 11133 transitions.
[2023-11-29 07:01:13,889 INFO  L78                 Accepts]: Start accepts. Automaton has 6735 states and 11133 transitions. Word has length 4473
[2023-11-29 07:01:13,891 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 07:01:13,891 INFO  L495      AbstractCegarLoop]: Abstraction has 6735 states and 11133 transitions.
[2023-11-29 07:01:13,892 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 539.125) internal successors, (4313), 8 states have internal predecessors, (4313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 07:01:13,892 INFO  L276                IsEmpty]: Start isEmpty. Operand 6735 states and 11133 transitions.
[2023-11-29 07:01:13,970 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4475
[2023-11-29 07:01:13,970 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 07:01:13,971 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 07:01:14,077 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0
[2023-11-29 07:01:14,171 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67
[2023-11-29 07:01:14,171 INFO  L420      AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 07:01:14,172 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 07:01:14,172 INFO  L85        PathProgramCache]: Analyzing trace with hash -1079315121, now seen corresponding path program 1 times
[2023-11-29 07:01:14,173 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 07:01:14,173 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982180957]
[2023-11-29 07:01:14,173 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 07:01:14,174 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 07:01:14,813 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 07:01:14,814 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957855104]
[2023-11-29 07:01:14,815 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 07:01:14,815 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 07:01:14,815 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 07:01:14,816 INFO  L229       MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 07:01:14,816 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b49d9d9-e289-4bcf-b80f-c2ca3a57e887/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process
[2023-11-29 07:01:24,938 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 07:01:25,192 INFO  L262         TraceCheckSpWp]: Trace formula consists of 37136 conjuncts, 27 conjunts are in the unsatisfiable core
[2023-11-29 07:01:25,280 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 07:01:31,060 INFO  L134       CoverageAnalysis]: Checked inductivity of 294 backedges. 252 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 07:01:31,060 INFO  L327         TraceCheckSpWp]: Computing backward predicates...