./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop2-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version e7bb482b
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop2-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3e97a263844c27cfbc90b2c6c29bfa9cf44094c2b077d629188394726afbad7a
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-e7bb482
[2023-11-06 22:21:53,794 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-06 22:21:53,864 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-06 22:21:53,870 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-06 22:21:53,871 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-06 22:21:53,896 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-06 22:21:53,897 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-06 22:21:53,897 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-06 22:21:53,898 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-06 22:21:53,899 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-06 22:21:53,900 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-06 22:21:53,900 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-06 22:21:53,901 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-06 22:21:53,901 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-06 22:21:53,902 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-06 22:21:53,903 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-06 22:21:53,903 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-06 22:21:53,904 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-06 22:21:53,904 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-06 22:21:53,904 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-06 22:21:53,905 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-06 22:21:53,906 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-06 22:21:53,906 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-06 22:21:53,906 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-06 22:21:53,907 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-06 22:21:53,907 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:21:53,908 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-06 22:21:53,908 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-06 22:21:53,909 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-11-06 22:21:53,909 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-06 22:21:53,909 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-06 22:21:53,910 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-06 22:21:53,910 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-06 22:21:53,911 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-06 22:21:53,911 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-06 22:21:53,911 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-06 22:21:53,912 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_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e97a263844c27cfbc90b2c6c29bfa9cf44094c2b077d629188394726afbad7a
[2023-11-06 22:21:54,208 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-06 22:21:54,232 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-06 22:21:54,235 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-06 22:21:54,237 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-06 22:21:54,238 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-06 22:21:54,239 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop2-back-serstep.c
[2023-11-06 22:21:57,463 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-06 22:21:58,028 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-06 22:21:58,029 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop2-back-serstep.c
[2023-11-06 22:21:58,062 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/data/75c3d1913/d722088774544facab83dfe095ce3a1d/FLAG3191e4ab5
[2023-11-06 22:21:58,086 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/data/75c3d1913/d722088774544facab83dfe095ce3a1d
[2023-11-06 22:21:58,095 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-06 22:21:58,099 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-06 22:21:58,104 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-06 22:21:58,105 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-06 22:21:58,111 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-06 22:21:58,112 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:58" (1/1) ...
[2023-11-06 22:21:58,113 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76284111 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:58, skipping insertion in model container
[2023-11-06 22:21:58,113 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:58" (1/1) ...
[2023-11-06 22:21:58,257 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-06 22:21:58,575 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_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop2-back-serstep.c[1175,1188]
[2023-11-06 22:21:59,682 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:21:59,694 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-06 22:21:59,712 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_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop2-back-serstep.c[1175,1188]
[2023-11-06 22:22:00,249 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:22:00,269 INFO  L206         MainTranslator]: Completed translation
[2023-11-06 22:22:00,270 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:00 WrapperNode
[2023-11-06 22:22:00,270 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-06 22:22:00,272 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-06 22:22:00,272 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-06 22:22:00,272 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-06 22:22:00,280 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:00" (1/1) ...
[2023-11-06 22:22:00,534 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:00" (1/1) ...
[2023-11-06 22:22:02,990 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24796
[2023-11-06 22:22:02,990 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-06 22:22:02,991 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-06 22:22:02,991 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-06 22:22:02,992 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-06 22:22:03,005 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:00" (1/1) ...
[2023-11-06 22:22:03,005 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:00" (1/1) ...
[2023-11-06 22:22:03,813 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:00" (1/1) ...
[2023-11-06 22:22:03,813 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:00" (1/1) ...
[2023-11-06 22:22:04,501 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:00" (1/1) ...
[2023-11-06 22:22:04,679 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:00" (1/1) ...
[2023-11-06 22:22:04,807 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:00" (1/1) ...
[2023-11-06 22:22:04,898 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:00" (1/1) ...
[2023-11-06 22:22:05,368 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-06 22:22:05,370 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-06 22:22:05,370 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-06 22:22:05,370 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-06 22:22:05,371 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:00" (1/1) ...
[2023-11-06 22:22:05,383 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:22:05,397 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:22:05,411 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-06 22:22:05,448 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-06 22:22:05,465 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-06 22:22:05,465 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-06 22:22:05,465 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-06 22:22:05,465 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-06 22:22:06,814 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-06 22:22:06,817 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-06 22:22:23,925 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-06 22:22:23,992 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-06 22:22:23,992 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-06 22:22:24,002 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:22:24 BoogieIcfgContainer
[2023-11-06 22:22:24,003 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-06 22:22:24,006 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-06 22:22:24,006 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-06 22:22:24,010 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-06 22:22:24,010 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:21:58" (1/3) ...
[2023-11-06 22:22:24,012 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62db8d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:22:24, skipping insertion in model container
[2023-11-06 22:22:24,012 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:00" (2/3) ...
[2023-11-06 22:22:24,013 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62db8d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:22:24, skipping insertion in model container
[2023-11-06 22:22:24,015 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:22:24" (3/3) ...
[2023-11-06 22:22:24,017 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.needham.3.prop2-back-serstep.c
[2023-11-06 22:22:24,038 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-06 22:22:24,038 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-06 22:22:24,239 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-06 22:22:24,248 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@51a58682, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-06 22:22:24,249 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-06 22:22:24,278 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 5842 states, 5840 states have (on average 1.6705479452054794) internal successors, (9756), 5841 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:24,337 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 612
[2023-11-06 22:22:24,337 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:22:24,338 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:22:24,339 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:22:24,345 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:22:24,346 INFO  L85        PathProgramCache]: Analyzing trace with hash 1758524264, now seen corresponding path program 1 times
[2023-11-06 22:22:24,358 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:22:24,358 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575794514]
[2023-11-06 22:22:24,359 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:24,360 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:22:25,487 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:22:29,011 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:22:29,011 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:22:29,012 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575794514]
[2023-11-06 22:22:29,013 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575794514] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:22:29,013 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:22:29,013 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:22:29,015 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183842892]
[2023-11-06 22:22:29,017 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:22:29,027 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:22:29,028 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:22:29,075 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:22:29,076 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:29,096 INFO  L87              Difference]: Start difference. First operand  has 5842 states, 5840 states have (on average 1.6705479452054794) internal successors, (9756), 5841 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:29,614 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:22:29,614 INFO  L93              Difference]: Finished difference Result 11500 states and 19210 transitions.
[2023-11-06 22:22:29,615 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:22:29,617 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 611
[2023-11-06 22:22:29,626 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:22:29,696 INFO  L225             Difference]: With dead ends: 11500
[2023-11-06 22:22:29,697 INFO  L226             Difference]: Without dead ends: 5840
[2023-11-06 22:22:29,718 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:29,725 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 1 mSDsluCounter, 19490 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29238 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:22:29,727 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29238 Invalid, 11 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:22:29,766 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5840 states.
[2023-11-06 22:22:29,958 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 5840.
[2023-11-06 22:22:29,978 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5840 states, 5839 states have (on average 1.6701489981161157) internal successors, (9752), 5839 states have internal predecessors, (9752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:30,012 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5840 states to 5840 states and 9752 transitions.
[2023-11-06 22:22:30,014 INFO  L78                 Accepts]: Start accepts. Automaton has 5840 states and 9752 transitions. Word has length 611
[2023-11-06 22:22:30,016 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:22:30,017 INFO  L495      AbstractCegarLoop]: Abstraction has 5840 states and 9752 transitions.
[2023-11-06 22:22:30,018 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:30,018 INFO  L276                IsEmpty]: Start isEmpty. Operand 5840 states and 9752 transitions.
[2023-11-06 22:22:30,040 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 613
[2023-11-06 22:22:30,040 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:22:30,041 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:22:30,041 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-06 22:22:30,042 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:22:30,043 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:22:30,043 INFO  L85        PathProgramCache]: Analyzing trace with hash -1318594080, now seen corresponding path program 1 times
[2023-11-06 22:22:30,044 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:22:30,044 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805542418]
[2023-11-06 22:22:30,044 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:30,045 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:22:30,465 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:22:32,388 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:22:32,388 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:22:32,389 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805542418]
[2023-11-06 22:22:32,390 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805542418] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:22:32,390 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:22:32,390 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:22:32,391 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133299736]
[2023-11-06 22:22:32,391 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:22:32,395 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:22:32,396 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:22:32,398 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:22:32,398 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:32,399 INFO  L87              Difference]: Start difference. First operand 5840 states and 9752 transitions. Second operand  has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:32,812 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:22:32,812 INFO  L93              Difference]: Finished difference Result 11501 states and 19206 transitions.
[2023-11-06 22:22:32,813 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:22:32,814 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 612
[2023-11-06 22:22:32,816 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:22:32,854 INFO  L225             Difference]: With dead ends: 11501
[2023-11-06 22:22:32,854 INFO  L226             Difference]: Without dead ends: 5843
[2023-11-06 22:22:32,868 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:32,871 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 1 mSDsluCounter, 19487 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29235 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:22:32,872 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29235 Invalid, 14 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:22:33,027 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5843 states.
[2023-11-06 22:22:33,144 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5843 to 5842.
[2023-11-06 22:22:33,171 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5842 states, 5841 states have (on average 1.669919534326314) internal successors, (9754), 5841 states have internal predecessors, (9754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:33,213 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5842 states to 5842 states and 9754 transitions.
[2023-11-06 22:22:33,213 INFO  L78                 Accepts]: Start accepts. Automaton has 5842 states and 9754 transitions. Word has length 612
[2023-11-06 22:22:33,215 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:22:33,215 INFO  L495      AbstractCegarLoop]: Abstraction has 5842 states and 9754 transitions.
[2023-11-06 22:22:33,216 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:33,217 INFO  L276                IsEmpty]: Start isEmpty. Operand 5842 states and 9754 transitions.
[2023-11-06 22:22:33,236 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 614
[2023-11-06 22:22:33,237 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:22:33,238 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:22:33,238 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-06 22:22:33,238 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:22:33,250 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:22:33,251 INFO  L85        PathProgramCache]: Analyzing trace with hash -657132284, now seen corresponding path program 1 times
[2023-11-06 22:22:33,251 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:22:33,251 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812981803]
[2023-11-06 22:22:33,252 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:33,252 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:22:33,637 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:22:35,628 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:22:35,630 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:22:35,630 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812981803]
[2023-11-06 22:22:35,630 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812981803] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:22:35,630 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:22:35,631 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-06 22:22:35,631 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26567520]
[2023-11-06 22:22:35,631 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:22:35,632 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 22:22:35,633 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:22:35,634 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 22:22:35,635 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:22:35,635 INFO  L87              Difference]: Start difference. First operand 5842 states and 9754 transitions. Second operand  has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:36,371 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:22:36,372 INFO  L93              Difference]: Finished difference Result 17878 states and 29853 transitions.
[2023-11-06 22:22:36,373 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:22:36,373 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 613
[2023-11-06 22:22:36,375 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:22:36,473 INFO  L225             Difference]: With dead ends: 17878
[2023-11-06 22:22:36,473 INFO  L226             Difference]: Without dead ends: 12218
[2023-11-06 22:22:36,487 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:22:36,494 INFO  L413           NwaCegarLoop]: 10952 mSDtfsCounter, 38671 mSDsluCounter, 19489 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38671 SdHoareTripleChecker+Valid, 30441 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:22:36,496 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [38671 Valid, 30441 Invalid, 15 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:22:36,521 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12218 states.
[2023-11-06 22:22:36,704 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12218 to 6567.
[2023-11-06 22:22:36,715 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6567 states, 6566 states have (on average 1.6693572951568687) internal successors, (10961), 6566 states have internal predecessors, (10961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:36,748 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6567 states to 6567 states and 10961 transitions.
[2023-11-06 22:22:36,748 INFO  L78                 Accepts]: Start accepts. Automaton has 6567 states and 10961 transitions. Word has length 613
[2023-11-06 22:22:36,750 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:22:36,750 INFO  L495      AbstractCegarLoop]: Abstraction has 6567 states and 10961 transitions.
[2023-11-06 22:22:36,751 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:36,755 INFO  L276                IsEmpty]: Start isEmpty. Operand 6567 states and 10961 transitions.
[2023-11-06 22:22:37,460 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4261
[2023-11-06 22:22:37,460 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:22:37,464 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:22:37,464 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-06 22:22:37,465 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:22:37,466 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:22:37,469 INFO  L85        PathProgramCache]: Analyzing trace with hash 99721, now seen corresponding path program 1 times
[2023-11-06 22:22:37,469 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:22:37,475 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108352350]
[2023-11-06 22:22:37,477 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:37,477 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:22:38,188 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:22:38,190 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591767302]
[2023-11-06 22:22:38,191 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:38,192 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:22:38,192 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:22:38,200 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:22:38,220 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-06 22:22:44,844 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:22:44,983 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17706 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:22:45,126 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:22:45,395 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:22:45,395 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:22:45,396 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:22:45,396 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108352350]
[2023-11-06 22:22:45,396 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:22:45,397 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591767302]
[2023-11-06 22:22:45,397 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [591767302] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:22:45,397 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:22:45,399 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:22:45,399 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757502037]
[2023-11-06 22:22:45,399 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:22:45,406 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:22:45,407 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:22:45,413 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:22:45,414 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:45,416 INFO  L87              Difference]: Start difference. First operand 6567 states and 10961 transitions. Second operand  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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)
[2023-11-06 22:22:45,747 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:22:45,748 INFO  L93              Difference]: Finished difference Result 12237 states and 20429 transitions.
[2023-11-06 22:22:45,748 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:22:45,751 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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 4260
[2023-11-06 22:22:45,753 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:22:45,768 INFO  L225             Difference]: With dead ends: 12237
[2023-11-06 22:22:45,768 INFO  L226             Difference]: Without dead ends: 6577
[2023-11-06 22:22:45,777 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4259 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:45,787 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 12 mSDsluCounter, 19484 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29232 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:22:45,788 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29232 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:22:45,806 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6577 states.
[2023-11-06 22:22:45,950 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6577 to 6569.
[2023-11-06 22:22:45,962 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6569 states, 6568 states have (on average 1.6691534713763703) internal successors, (10963), 6568 states have internal predecessors, (10963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:45,994 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 10963 transitions.
[2023-11-06 22:22:45,994 INFO  L78                 Accepts]: Start accepts. Automaton has 6569 states and 10963 transitions. Word has length 4260
[2023-11-06 22:22:45,996 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:22:45,997 INFO  L495      AbstractCegarLoop]: Abstraction has 6569 states and 10963 transitions.
[2023-11-06 22:22:45,999 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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)
[2023-11-06 22:22:45,999 INFO  L276                IsEmpty]: Start isEmpty. Operand 6569 states and 10963 transitions.
[2023-11-06 22:22:46,298 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4261
[2023-11-06 22:22:46,298 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:22:46,302 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:22:46,366 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-06 22:22:46,516 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:22:46,517 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:22:46,517 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:22:46,519 INFO  L85        PathProgramCache]: Analyzing trace with hash 389250775, now seen corresponding path program 1 times
[2023-11-06 22:22:46,519 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:22:46,519 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626445802]
[2023-11-06 22:22:46,519 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:46,520 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:22:47,220 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:22:47,221 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932874066]
[2023-11-06 22:22:47,222 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:47,223 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:22:47,225 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:22:47,229 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:22:47,256 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-06 22:22:53,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:22:53,487 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17707 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:22:53,817 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:22:53,978 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:22:53,978 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:22:53,978 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:22:53,978 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626445802]
[2023-11-06 22:22:53,979 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:22:53,979 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932874066]
[2023-11-06 22:22:53,979 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [932874066] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:22:53,979 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:22:53,981 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:22:53,981 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572827684]
[2023-11-06 22:22:53,981 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:22:53,988 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:22:53,988 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:22:53,993 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:22:53,994 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:53,996 INFO  L87              Difference]: Start difference. First operand 6569 states and 10963 transitions. Second operand  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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)
[2023-11-06 22:22:54,336 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:22:54,336 INFO  L93              Difference]: Finished difference Result 12240 states and 20431 transitions.
[2023-11-06 22:22:54,337 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:22:54,339 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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 4260
[2023-11-06 22:22:54,341 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:22:54,356 INFO  L225             Difference]: With dead ends: 12240
[2023-11-06 22:22:54,356 INFO  L226             Difference]: Without dead ends: 6578
[2023-11-06 22:22:54,365 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4259 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:22:54,366 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 12 mSDsluCounter, 19484 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29232 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:22:54,367 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29232 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:22:54,382 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6578 states.
[2023-11-06 22:22:54,511 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6578 to 6570.
[2023-11-06 22:22:54,522 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6570 states, 6569 states have (on average 1.6690516060283147) internal successors, (10964), 6569 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:22:54,539 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 10964 transitions.
[2023-11-06 22:22:54,540 INFO  L78                 Accepts]: Start accepts. Automaton has 6570 states and 10964 transitions. Word has length 4260
[2023-11-06 22:22:54,542 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:22:54,542 INFO  L495      AbstractCegarLoop]: Abstraction has 6570 states and 10964 transitions.
[2023-11-06 22:22:54,544 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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)
[2023-11-06 22:22:54,545 INFO  L276                IsEmpty]: Start isEmpty. Operand 6570 states and 10964 transitions.
[2023-11-06 22:22:54,793 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4261
[2023-11-06 22:22:54,794 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:22:54,797 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:22:54,872 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-06 22:22:55,020 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:22:55,020 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:22:55,021 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:22:55,023 INFO  L85        PathProgramCache]: Analyzing trace with hash -1392083675, now seen corresponding path program 1 times
[2023-11-06 22:22:55,023 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:22:55,023 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108658279]
[2023-11-06 22:22:55,024 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:55,025 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:22:55,651 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:22:55,655 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830036424]
[2023-11-06 22:22:55,657 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:22:55,657 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:22:55,657 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:22:55,659 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:22:55,680 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-06 22:23:01,449 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:23:01,568 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17708 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:23:01,708 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:23:01,895 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:23:01,896 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:23:01,896 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:23:01,896 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108658279]
[2023-11-06 22:23:01,896 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:23:01,896 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830036424]
[2023-11-06 22:23:01,897 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830036424] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:23:01,897 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:23:01,899 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:23:01,899 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577641762]
[2023-11-06 22:23:01,899 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:23:01,906 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:23:01,906 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:23:01,912 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:23:01,912 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:23:01,915 INFO  L87              Difference]: Start difference. First operand 6570 states and 10964 transitions. Second operand  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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)
[2023-11-06 22:23:02,217 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:23:02,217 INFO  L93              Difference]: Finished difference Result 12242 states and 20433 transitions.
[2023-11-06 22:23:02,218 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:23:02,220 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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 4260
[2023-11-06 22:23:02,223 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:23:02,238 INFO  L225             Difference]: With dead ends: 12242
[2023-11-06 22:23:02,238 INFO  L226             Difference]: Without dead ends: 6579
[2023-11-06 22:23:02,246 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4259 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:23:02,247 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 12 mSDsluCounter, 19484 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29232 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:23:02,248 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29232 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:23:02,261 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6579 states.
[2023-11-06 22:23:02,368 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6579 to 6571.
[2023-11-06 22:23:02,380 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6571 states, 6570 states have (on average 1.6689497716894977) internal successors, (10965), 6570 states have internal predecessors, (10965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:02,398 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6571 states to 6571 states and 10965 transitions.
[2023-11-06 22:23:02,399 INFO  L78                 Accepts]: Start accepts. Automaton has 6571 states and 10965 transitions. Word has length 4260
[2023-11-06 22:23:02,401 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:23:02,402 INFO  L495      AbstractCegarLoop]: Abstraction has 6571 states and 10965 transitions.
[2023-11-06 22:23:02,404 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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)
[2023-11-06 22:23:02,404 INFO  L276                IsEmpty]: Start isEmpty. Operand 6571 states and 10965 transitions.
[2023-11-06 22:23:02,670 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4261
[2023-11-06 22:23:02,670 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:23:02,674 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:23:02,734 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-06 22:23:02,900 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:02,901 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:23:02,901 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:23:02,903 INFO  L85        PathProgramCache]: Analyzing trace with hash 1721378803, now seen corresponding path program 1 times
[2023-11-06 22:23:02,903 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:23:02,903 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897025773]
[2023-11-06 22:23:02,903 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:02,904 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:23:03,395 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:23:03,395 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715341052]
[2023-11-06 22:23:03,397 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:03,397 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:03,397 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:23:03,398 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:23:03,456 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-06 22:23:09,551 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:23:09,673 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17709 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:23:09,803 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:23:10,181 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:23:10,181 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:23:10,181 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:23:10,181 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897025773]
[2023-11-06 22:23:10,182 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:23:10,182 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715341052]
[2023-11-06 22:23:10,182 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715341052] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:23:10,182 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:23:10,184 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:23:10,184 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835759064]
[2023-11-06 22:23:10,184 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:23:10,191 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:23:10,191 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:23:10,197 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:23:10,197 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:23:10,199 INFO  L87              Difference]: Start difference. First operand 6571 states and 10965 transitions. Second operand  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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)
[2023-11-06 22:23:10,483 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:23:10,484 INFO  L93              Difference]: Finished difference Result 12244 states and 20435 transitions.
[2023-11-06 22:23:10,484 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:23:10,486 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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 4260
[2023-11-06 22:23:10,489 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:23:10,503 INFO  L225             Difference]: With dead ends: 12244
[2023-11-06 22:23:10,504 INFO  L226             Difference]: Without dead ends: 6580
[2023-11-06 22:23:10,512 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4259 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:23:10,513 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 12 mSDsluCounter, 19484 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29232 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:23:10,514 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29232 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:23:10,527 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6580 states.
[2023-11-06 22:23:10,639 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6580 to 6572.
[2023-11-06 22:23:10,650 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6572 states, 6571 states have (on average 1.6688479683457618) internal successors, (10966), 6571 states have internal predecessors, (10966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:10,667 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6572 states to 6572 states and 10966 transitions.
[2023-11-06 22:23:10,667 INFO  L78                 Accepts]: Start accepts. Automaton has 6572 states and 10966 transitions. Word has length 4260
[2023-11-06 22:23:10,670 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:23:10,670 INFO  L495      AbstractCegarLoop]: Abstraction has 6572 states and 10966 transitions.
[2023-11-06 22:23:10,672 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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)
[2023-11-06 22:23:10,672 INFO  L276                IsEmpty]: Start isEmpty. Operand 6572 states and 10966 transitions.
[2023-11-06 22:23:10,824 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4261
[2023-11-06 22:23:10,824 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:23:10,827 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:23:10,879 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-06 22:23:11,027 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:11,028 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:23:11,028 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:23:11,030 INFO  L85        PathProgramCache]: Analyzing trace with hash -1926764863, now seen corresponding path program 1 times
[2023-11-06 22:23:11,030 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:23:11,031 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713663348]
[2023-11-06 22:23:11,031 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:11,031 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:23:11,536 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:23:11,536 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658672485]
[2023-11-06 22:23:11,537 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:11,538 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:11,538 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:23:11,555 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:23:11,592 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-06 22:23:17,616 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:23:17,736 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17710 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:23:17,803 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:23:17,989 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:23:17,989 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:23:17,990 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:23:17,990 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713663348]
[2023-11-06 22:23:17,990 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:23:17,990 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658672485]
[2023-11-06 22:23:17,990 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [658672485] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:23:17,990 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:23:17,992 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:23:17,993 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701100487]
[2023-11-06 22:23:17,993 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:23:17,999 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:23:18,000 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:23:18,005 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:23:18,005 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:23:18,007 INFO  L87              Difference]: Start difference. First operand 6572 states and 10966 transitions. Second operand  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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)
[2023-11-06 22:23:18,330 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:23:18,330 INFO  L93              Difference]: Finished difference Result 12246 states and 20437 transitions.
[2023-11-06 22:23:18,331 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:23:18,333 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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 4260
[2023-11-06 22:23:18,342 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:23:18,358 INFO  L225             Difference]: With dead ends: 12246
[2023-11-06 22:23:18,358 INFO  L226             Difference]: Without dead ends: 6581
[2023-11-06 22:23:18,366 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4259 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:23:18,368 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 12 mSDsluCounter, 19484 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29232 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:23:18,369 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29232 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:23:18,381 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6581 states.
[2023-11-06 22:23:18,722 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6581 to 6573.
[2023-11-06 22:23:18,733 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6573 states, 6572 states have (on average 1.668746195982958) internal successors, (10967), 6572 states have internal predecessors, (10967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:18,750 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6573 states to 6573 states and 10967 transitions.
[2023-11-06 22:23:18,750 INFO  L78                 Accepts]: Start accepts. Automaton has 6573 states and 10967 transitions. Word has length 4260
[2023-11-06 22:23:18,765 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:23:18,766 INFO  L495      AbstractCegarLoop]: Abstraction has 6573 states and 10967 transitions.
[2023-11-06 22:23:18,767 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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)
[2023-11-06 22:23:18,767 INFO  L276                IsEmpty]: Start isEmpty. Operand 6573 states and 10967 transitions.
[2023-11-06 22:23:18,919 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4261
[2023-11-06 22:23:18,920 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:23:18,923 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:23:18,987 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-06 22:23:19,140 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:19,140 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:23:19,141 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:23:19,143 INFO  L85        PathProgramCache]: Analyzing trace with hash -1987294669, now seen corresponding path program 1 times
[2023-11-06 22:23:19,143 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:23:19,143 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84137082]
[2023-11-06 22:23:19,144 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:19,145 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:23:19,655 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:23:19,655 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824793767]
[2023-11-06 22:23:19,656 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:19,657 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:19,657 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:23:19,675 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:23:19,696 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-06 22:23:25,419 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:23:25,545 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17711 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-06 22:23:25,615 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:23:25,807 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:23:25,808 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:23:25,808 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:23:25,808 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84137082]
[2023-11-06 22:23:25,808 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:23:25,809 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824793767]
[2023-11-06 22:23:25,809 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824793767] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:23:25,809 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:23:25,811 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:23:25,811 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847379331]
[2023-11-06 22:23:25,811 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:23:25,821 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:23:25,821 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:23:25,827 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:23:25,828 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:23:25,830 INFO  L87              Difference]: Start difference. First operand 6573 states and 10967 transitions. Second operand  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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)
[2023-11-06 22:23:26,261 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:23:26,261 INFO  L93              Difference]: Finished difference Result 12248 states and 20439 transitions.
[2023-11-06 22:23:26,262 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:23:26,263 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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 4260
[2023-11-06 22:23:26,272 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:23:26,287 INFO  L225             Difference]: With dead ends: 12248
[2023-11-06 22:23:26,287 INFO  L226             Difference]: Without dead ends: 6582
[2023-11-06 22:23:26,295 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4259 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:23:26,298 INFO  L413           NwaCegarLoop]: 9748 mSDtfsCounter, 12 mSDsluCounter, 19484 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29232 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:23:26,299 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29232 Invalid, 16 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:23:26,310 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6582 states.
[2023-11-06 22:23:26,413 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6582 to 6574.
[2023-11-06 22:23:26,422 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6574 states, 6573 states have (on average 1.6686444545869465) internal successors, (10968), 6573 states have internal predecessors, (10968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:26,439 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6574 states to 6574 states and 10968 transitions.
[2023-11-06 22:23:26,439 INFO  L78                 Accepts]: Start accepts. Automaton has 6574 states and 10968 transitions. Word has length 4260
[2023-11-06 22:23:26,447 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:23:26,447 INFO  L495      AbstractCegarLoop]: Abstraction has 6574 states and 10968 transitions.
[2023-11-06 22:23:26,448 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1065.0) internal successors, (4260), 4 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)
[2023-11-06 22:23:26,449 INFO  L276                IsEmpty]: Start isEmpty. Operand 6574 states and 10968 transitions.
[2023-11-06 22:23:26,609 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4261
[2023-11-06 22:23:26,609 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:23:26,613 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:23:26,676 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-06 22:23:26,828 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8
[2023-11-06 22:23:26,829 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:23:26,829 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:23:26,831 INFO  L85        PathProgramCache]: Analyzing trace with hash 731622309, now seen corresponding path program 1 times
[2023-11-06 22:23:26,831 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:23:26,831 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516707075]
[2023-11-06 22:23:26,832 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:26,832 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:23:27,417 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:23:27,418 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495721569]
[2023-11-06 22:23:27,419 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:27,419 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:27,420 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:23:27,421 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:23:27,440 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-06 22:23:33,157 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:23:33,278 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17712 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:23:33,377 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:23:34,013 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked.
[2023-11-06 22:23:34,014 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:23:34,014 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:23:34,014 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516707075]
[2023-11-06 22:23:34,014 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:23:34,015 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495721569]
[2023-11-06 22:23:34,015 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495721569] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:23:34,015 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:23:34,017 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:23:34,020 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553432977]
[2023-11-06 22:23:34,020 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:23:34,031 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:23:34,031 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:23:34,036 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:23:34,037 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:23:34,038 INFO  L87              Difference]: Start difference. First operand 6574 states and 10968 transitions. Second operand  has 7 states, 7 states have (on average 539.8571428571429) internal successors, (3779), 7 states have internal predecessors, (3779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:34,812 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:23:34,812 INFO  L93              Difference]: Finished difference Result 17905 states and 29880 transitions.
[2023-11-06 22:23:34,813 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:23:34,815 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 539.8571428571429) internal successors, (3779), 7 states have internal predecessors, (3779), 0 states have call successors, (0), 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 4260
[2023-11-06 22:23:34,827 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:23:34,853 INFO  L225             Difference]: With dead ends: 17905
[2023-11-06 22:23:34,853 INFO  L226             Difference]: Without dead ends: 12238
[2023-11-06 22:23:34,863 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4269 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:23:34,864 INFO  L413           NwaCegarLoop]: 10950 mSDtfsCounter, 27308 mSDsluCounter, 42577 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27308 SdHoareTripleChecker+Valid, 53527 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:23:34,865 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27308 Valid, 53527 Invalid, 46 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:23:34,885 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12238 states.
[2023-11-06 22:23:35,024 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12238 to 6574.
[2023-11-06 22:23:35,034 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6574 states, 6573 states have (on average 1.6686444545869465) internal successors, (10968), 6573 states have internal predecessors, (10968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:35,176 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6574 states to 6574 states and 10968 transitions.
[2023-11-06 22:23:35,177 INFO  L78                 Accepts]: Start accepts. Automaton has 6574 states and 10968 transitions. Word has length 4260
[2023-11-06 22:23:35,185 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:23:35,185 INFO  L495      AbstractCegarLoop]: Abstraction has 6574 states and 10968 transitions.
[2023-11-06 22:23:35,187 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 539.8571428571429) internal successors, (3779), 7 states have internal predecessors, (3779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:35,187 INFO  L276                IsEmpty]: Start isEmpty. Operand 6574 states and 10968 transitions.
[2023-11-06 22:23:35,346 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4262
[2023-11-06 22:23:35,347 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:23:35,353 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:23:35,429 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-06 22:23:35,568 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-06 22:23:35,569 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:23:35,569 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:23:35,571 INFO  L85        PathProgramCache]: Analyzing trace with hash 1094752199, now seen corresponding path program 1 times
[2023-11-06 22:23:35,571 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:23:35,572 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754804269]
[2023-11-06 22:23:35,572 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:35,573 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:23:36,223 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:23:36,224 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535702636]
[2023-11-06 22:23:36,225 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:36,225 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:36,226 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:23:36,227 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:23:36,234 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-06 22:23:42,073 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:23:42,190 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17715 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 22:23:42,259 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:23:42,914 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked.
[2023-11-06 22:23:42,914 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:23:42,914 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:23:42,915 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754804269]
[2023-11-06 22:23:42,915 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:23:42,915 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535702636]
[2023-11-06 22:23:42,915 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535702636] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:23:42,915 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:23:42,917 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-06 22:23:42,918 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018411053]
[2023-11-06 22:23:42,918 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:23:42,924 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-06 22:23:42,924 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:23:42,929 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-06 22:23:42,930 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:23:42,932 INFO  L87              Difference]: Start difference. First operand 6574 states and 10968 transitions. Second operand  has 8 states, 8 states have (on average 472.75) internal successors, (3782), 8 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:43,854 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:23:43,854 INFO  L93              Difference]: Finished difference Result 17907 states and 29882 transitions.
[2023-11-06 22:23:43,855 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:23:43,857 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 472.75) internal successors, (3782), 8 states have internal predecessors, (3782), 0 states have call successors, (0), 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 4261
[2023-11-06 22:23:43,868 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:23:43,891 INFO  L225             Difference]: With dead ends: 17907
[2023-11-06 22:23:43,891 INFO  L226             Difference]: Without dead ends: 12237
[2023-11-06 22:23:43,901 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4270 GetRequests, 4257 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-06 22:23:43,902 INFO  L413           NwaCegarLoop]: 10945 mSDtfsCounter, 27307 mSDsluCounter, 53502 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27307 SdHoareTripleChecker+Valid, 64447 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:23:43,903 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27307 Valid, 64447 Invalid, 58 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:23:43,921 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12237 states.
[2023-11-06 22:23:44,145 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12237 to 6576.
[2023-11-06 22:23:44,152 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6576 states, 6575 states have (on average 1.6684410646387833) internal successors, (10970), 6575 states have internal predecessors, (10970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:44,168 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 10970 transitions.
[2023-11-06 22:23:44,168 INFO  L78                 Accepts]: Start accepts. Automaton has 6576 states and 10970 transitions. Word has length 4261
[2023-11-06 22:23:44,177 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:23:44,177 INFO  L495      AbstractCegarLoop]: Abstraction has 6576 states and 10970 transitions.
[2023-11-06 22:23:44,178 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 472.75) internal successors, (3782), 8 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:44,179 INFO  L276                IsEmpty]: Start isEmpty. Operand 6576 states and 10970 transitions.
[2023-11-06 22:23:44,325 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4263
[2023-11-06 22:23:44,325 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:23:44,329 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:23:44,403 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-11-06 22:23:44,544 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:44,544 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:23:44,545 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:23:44,548 INFO  L85        PathProgramCache]: Analyzing trace with hash -621219713, now seen corresponding path program 1 times
[2023-11-06 22:23:44,549 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:23:44,549 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604401291]
[2023-11-06 22:23:44,550 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:44,550 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:23:45,220 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:23:45,220 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817709959]
[2023-11-06 22:23:45,222 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:45,222 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:45,222 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:23:45,224 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:23:45,252 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-06 22:23:51,124 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:23:51,243 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17718 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:23:51,308 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:23:51,913 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked.
[2023-11-06 22:23:51,913 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:23:51,913 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:23:51,913 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604401291]
[2023-11-06 22:23:51,914 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:23:51,914 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817709959]
[2023-11-06 22:23:51,914 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [817709959] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:23:51,914 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:23:51,916 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:23:51,916 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816267745]
[2023-11-06 22:23:51,917 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:23:51,922 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:23:51,923 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:23:51,928 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:23:51,928 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:23:51,930 INFO  L87              Difference]: Start difference. First operand 6576 states and 10970 transitions. Second operand  has 7 states, 7 states have (on average 540.7142857142857) internal successors, (3785), 7 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:52,658 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:23:52,658 INFO  L93              Difference]: Finished difference Result 17913 states and 29888 transitions.
[2023-11-06 22:23:52,659 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:23:52,660 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 540.7142857142857) internal successors, (3785), 7 states have internal predecessors, (3785), 0 states have call successors, (0), 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 4262
[2023-11-06 22:23:52,666 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:23:52,688 INFO  L225             Difference]: With dead ends: 17913
[2023-11-06 22:23:52,689 INFO  L226             Difference]: Without dead ends: 12238
[2023-11-06 22:23:52,697 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4271 GetRequests, 4259 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:23:52,698 INFO  L413           NwaCegarLoop]: 10940 mSDtfsCounter, 27306 mSDsluCounter, 42546 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27306 SdHoareTripleChecker+Valid, 53486 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:23:52,698 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27306 Valid, 53486 Invalid, 47 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:23:52,717 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12238 states.
[2023-11-06 22:23:52,916 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12238 to 6578.
[2023-11-06 22:23:52,924 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6578 states, 6577 states have (on average 1.668237798388323) internal successors, (10972), 6577 states have internal predecessors, (10972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:52,939 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6578 states to 6578 states and 10972 transitions.
[2023-11-06 22:23:52,940 INFO  L78                 Accepts]: Start accepts. Automaton has 6578 states and 10972 transitions. Word has length 4262
[2023-11-06 22:23:52,943 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:23:52,944 INFO  L495      AbstractCegarLoop]: Abstraction has 6578 states and 10972 transitions.
[2023-11-06 22:23:52,945 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 540.7142857142857) internal successors, (3785), 7 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:23:52,945 INFO  L276                IsEmpty]: Start isEmpty. Operand 6578 states and 10972 transitions.
[2023-11-06 22:23:53,092 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4264
[2023-11-06 22:23:53,092 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:23:53,096 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:23:53,172 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2023-11-06 22:23:53,312 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-06 22:23:53,312 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:23:53,313 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:23:53,314 INFO  L85        PathProgramCache]: Analyzing trace with hash 1757016045, now seen corresponding path program 1 times
[2023-11-06 22:23:53,315 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:23:53,315 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610875291]
[2023-11-06 22:23:53,316 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:53,316 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:23:53,856 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:23:53,857 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944206928]
[2023-11-06 22:23:53,858 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:23:53,859 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:23:53,859 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:23:53,861 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:23:53,892 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-06 22:23:59,813 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:23:59,932 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17721 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:23:59,996 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:24:00,667 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked.
[2023-11-06 22:24:00,667 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:24:00,668 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:24:00,668 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610875291]
[2023-11-06 22:24:00,668 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:24:00,669 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944206928]
[2023-11-06 22:24:00,669 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [944206928] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:24:00,669 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:24:00,671 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:24:00,671 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871534184]
[2023-11-06 22:24:00,672 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:24:00,679 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:24:00,679 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:24:00,687 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:24:00,687 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:24:00,689 INFO  L87              Difference]: Start difference. First operand 6578 states and 10972 transitions. Second operand  has 7 states, 7 states have (on average 541.1428571428571) internal successors, (3788), 7 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:01,417 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:24:01,417 INFO  L93              Difference]: Finished difference Result 17919 states and 29894 transitions.
[2023-11-06 22:24:01,418 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:24:01,419 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 541.1428571428571) internal successors, (3788), 7 states have internal predecessors, (3788), 0 states have call successors, (0), 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 4263
[2023-11-06 22:24:01,424 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:24:01,452 INFO  L225             Difference]: With dead ends: 17919
[2023-11-06 22:24:01,452 INFO  L226             Difference]: Without dead ends: 12239
[2023-11-06 22:24:01,461 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4272 GetRequests, 4260 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:24:01,462 INFO  L413           NwaCegarLoop]: 10935 mSDtfsCounter, 27305 mSDsluCounter, 42531 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27305 SdHoareTripleChecker+Valid, 53466 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:24:01,463 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27305 Valid, 53466 Invalid, 47 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:24:01,484 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12239 states.
[2023-11-06 22:24:01,682 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12239 to 6580.
[2023-11-06 22:24:01,690 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6580 states, 6579 states have (on average 1.6680346557227541) internal successors, (10974), 6579 states have internal predecessors, (10974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:01,705 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6580 states to 6580 states and 10974 transitions.
[2023-11-06 22:24:01,705 INFO  L78                 Accepts]: Start accepts. Automaton has 6580 states and 10974 transitions. Word has length 4263
[2023-11-06 22:24:01,708 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:24:01,709 INFO  L495      AbstractCegarLoop]: Abstraction has 6580 states and 10974 transitions.
[2023-11-06 22:24:01,710 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 541.1428571428571) internal successors, (3788), 7 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:01,710 INFO  L276                IsEmpty]: Start isEmpty. Operand 6580 states and 10974 transitions.
[2023-11-06 22:24:01,855 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4265
[2023-11-06 22:24:01,855 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:24:01,859 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:24:01,934 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2023-11-06 22:24:02,076 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-06 22:24:02,077 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:24:02,077 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:24:02,079 INFO  L85        PathProgramCache]: Analyzing trace with hash 1557989083, now seen corresponding path program 1 times
[2023-11-06 22:24:02,079 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:24:02,079 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248157325]
[2023-11-06 22:24:02,080 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:24:02,080 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:24:02,699 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:24:02,699 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899518187]
[2023-11-06 22:24:02,701 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:24:02,701 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:24:02,701 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:24:02,702 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:24:02,740 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-06 22:24:08,791 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:24:08,914 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17725 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:24:08,978 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:24:09,501 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked.
[2023-11-06 22:24:09,501 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:24:09,501 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:24:09,501 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248157325]
[2023-11-06 22:24:09,502 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:24:09,502 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899518187]
[2023-11-06 22:24:09,502 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [899518187] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:24:09,503 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:24:09,505 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:24:09,506 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294697431]
[2023-11-06 22:24:09,506 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:24:09,511 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:24:09,511 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:24:09,517 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:24:09,517 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:24:09,519 INFO  L87              Difference]: Start difference. First operand 6580 states and 10974 transitions. Second operand  has 7 states, 7 states have (on average 541.5714285714286) internal successors, (3791), 7 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:10,109 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:24:10,109 INFO  L93              Difference]: Finished difference Result 17925 states and 29900 transitions.
[2023-11-06 22:24:10,110 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:24:10,111 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 541.5714285714286) internal successors, (3791), 7 states have internal predecessors, (3791), 0 states have call successors, (0), 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 4264
[2023-11-06 22:24:10,114 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:24:10,133 INFO  L225             Difference]: With dead ends: 17925
[2023-11-06 22:24:10,133 INFO  L226             Difference]: Without dead ends: 12240
[2023-11-06 22:24:10,142 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4273 GetRequests, 4261 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:24:10,143 INFO  L413           NwaCegarLoop]: 10930 mSDtfsCounter, 27304 mSDsluCounter, 42516 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27304 SdHoareTripleChecker+Valid, 53446 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:24:10,143 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27304 Valid, 53446 Invalid, 47 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:24:10,160 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12240 states.
[2023-11-06 22:24:10,355 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12240 to 6582.
[2023-11-06 22:24:10,362 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6582 states, 6581 states have (on average 1.6678316365294028) internal successors, (10976), 6581 states have internal predecessors, (10976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:10,377 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6582 states to 6582 states and 10976 transitions.
[2023-11-06 22:24:10,377 INFO  L78                 Accepts]: Start accepts. Automaton has 6582 states and 10976 transitions. Word has length 4264
[2023-11-06 22:24:10,381 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:24:10,381 INFO  L495      AbstractCegarLoop]: Abstraction has 6582 states and 10976 transitions.
[2023-11-06 22:24:10,382 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 541.5714285714286) internal successors, (3791), 7 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:10,382 INFO  L276                IsEmpty]: Start isEmpty. Operand 6582 states and 10976 transitions.
[2023-11-06 22:24:10,527 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4266
[2023-11-06 22:24:10,527 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:24:10,531 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:24:10,605 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2023-11-06 22:24:10,756 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-06 22:24:10,757 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:24:10,758 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:24:10,760 INFO  L85        PathProgramCache]: Analyzing trace with hash -755012203, now seen corresponding path program 1 times
[2023-11-06 22:24:10,760 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:24:10,760 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740109523]
[2023-11-06 22:24:10,761 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:24:10,761 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:24:11,381 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:24:11,382 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677291976]
[2023-11-06 22:24:11,383 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:24:11,383 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:24:11,384 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:24:11,385 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:24:11,399 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-06 22:24:17,440 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:24:17,560 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17728 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:24:17,624 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:24:18,125 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked.
[2023-11-06 22:24:18,125 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:24:18,125 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:24:18,125 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740109523]
[2023-11-06 22:24:18,125 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:24:18,126 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677291976]
[2023-11-06 22:24:18,126 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [677291976] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:24:18,126 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:24:18,128 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:24:18,129 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458632153]
[2023-11-06 22:24:18,129 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:24:18,134 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:24:18,134 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:24:18,140 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:24:18,140 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:24:18,141 INFO  L87              Difference]: Start difference. First operand 6582 states and 10976 transitions. Second operand  has 7 states, 7 states have (on average 542.0) internal successors, (3794), 7 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:18,794 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:24:18,794 INFO  L93              Difference]: Finished difference Result 17931 states and 29906 transitions.
[2023-11-06 22:24:18,794 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:24:18,795 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 542.0) internal successors, (3794), 7 states have internal predecessors, (3794), 0 states have call successors, (0), 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 4265
[2023-11-06 22:24:18,800 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:24:18,812 INFO  L225             Difference]: With dead ends: 17931
[2023-11-06 22:24:18,813 INFO  L226             Difference]: Without dead ends: 12241
[2023-11-06 22:24:18,821 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4274 GetRequests, 4262 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:24:18,822 INFO  L413           NwaCegarLoop]: 10925 mSDtfsCounter, 27303 mSDsluCounter, 42501 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27303 SdHoareTripleChecker+Valid, 53426 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:24:18,823 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27303 Valid, 53426 Invalid, 47 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:24:18,843 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12241 states.
[2023-11-06 22:24:19,002 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 6584.
[2023-11-06 22:24:19,010 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6584 states, 6583 states have (on average 1.6676287406957315) internal successors, (10978), 6583 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:19,037 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6584 states to 6584 states and 10978 transitions.
[2023-11-06 22:24:19,037 INFO  L78                 Accepts]: Start accepts. Automaton has 6584 states and 10978 transitions. Word has length 4265
[2023-11-06 22:24:19,042 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:24:19,042 INFO  L495      AbstractCegarLoop]: Abstraction has 6584 states and 10978 transitions.
[2023-11-06 22:24:19,043 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 542.0) internal successors, (3794), 7 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:19,044 INFO  L276                IsEmpty]: Start isEmpty. Operand 6584 states and 10978 transitions.
[2023-11-06 22:24:19,225 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4267
[2023-11-06 22:24:19,225 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:24:19,228 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:24:19,288 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2023-11-06 22:24:19,452 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-06 22:24:19,452 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:24:19,453 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:24:19,454 INFO  L85        PathProgramCache]: Analyzing trace with hash -1256486987, now seen corresponding path program 1 times
[2023-11-06 22:24:19,454 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:24:19,455 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774111707]
[2023-11-06 22:24:19,455 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:24:19,455 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:24:20,001 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:24:20,001 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074261608]
[2023-11-06 22:24:20,003 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:24:20,003 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:24:20,003 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:24:20,005 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:24:20,028 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-06 22:24:26,030 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:24:26,149 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17731 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 22:24:26,212 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:24:26,539 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked.
[2023-11-06 22:24:26,540 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:24:26,540 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:24:26,540 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774111707]
[2023-11-06 22:24:26,540 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:24:26,540 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074261608]
[2023-11-06 22:24:26,540 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074261608] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:24:26,540 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:24:26,542 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-06 22:24:26,542 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828660461]
[2023-11-06 22:24:26,543 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:24:26,548 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-06 22:24:26,548 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:24:26,552 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-06 22:24:26,552 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:24:26,553 INFO  L87              Difference]: Start difference. First operand 6584 states and 10978 transitions. Second operand  has 8 states, 8 states have (on average 474.625) internal successors, (3797), 8 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:27,205 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:24:27,205 INFO  L93              Difference]: Finished difference Result 17937 states and 29912 transitions.
[2023-11-06 22:24:27,206 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:24:27,207 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 474.625) internal successors, (3797), 8 states have internal predecessors, (3797), 0 states have call successors, (0), 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 4266
[2023-11-06 22:24:27,210 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:24:27,220 INFO  L225             Difference]: With dead ends: 17937
[2023-11-06 22:24:27,220 INFO  L226             Difference]: Without dead ends: 12242
[2023-11-06 22:24:27,229 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4275 GetRequests, 4262 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-06 22:24:27,229 INFO  L413           NwaCegarLoop]: 10920 mSDtfsCounter, 27302 mSDsluCounter, 53402 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27302 SdHoareTripleChecker+Valid, 64322 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:24:27,230 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27302 Valid, 64322 Invalid, 58 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:24:27,247 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12242 states.
[2023-11-06 22:24:27,366 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12242 to 6586.
[2023-11-06 22:24:27,374 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6586 states, 6585 states have (on average 1.6674259681093395) internal successors, (10980), 6585 states have internal predecessors, (10980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:27,388 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6586 states to 6586 states and 10980 transitions.
[2023-11-06 22:24:27,389 INFO  L78                 Accepts]: Start accepts. Automaton has 6586 states and 10980 transitions. Word has length 4266
[2023-11-06 22:24:27,392 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:24:27,393 INFO  L495      AbstractCegarLoop]: Abstraction has 6586 states and 10980 transitions.
[2023-11-06 22:24:27,394 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 474.625) internal successors, (3797), 8 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:27,394 INFO  L276                IsEmpty]: Start isEmpty. Operand 6586 states and 10980 transitions.
[2023-11-06 22:24:27,559 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4268
[2023-11-06 22:24:27,559 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:24:27,562 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:24:27,630 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0
[2023-11-06 22:24:27,778 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-06 22:24:27,779 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:24:27,779 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:24:27,781 INFO  L85        PathProgramCache]: Analyzing trace with hash 2114611643, now seen corresponding path program 1 times
[2023-11-06 22:24:27,781 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:24:27,781 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761683620]
[2023-11-06 22:24:27,782 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:24:27,782 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:24:28,188 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:24:28,189 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998625795]
[2023-11-06 22:24:28,190 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:24:28,190 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:24:28,190 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:24:28,192 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:24:28,226 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-06 22:24:34,009 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:24:34,136 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17734 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:24:34,198 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:24:34,692 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked.
[2023-11-06 22:24:34,692 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:24:34,692 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:24:34,692 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761683620]
[2023-11-06 22:24:34,693 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:24:34,693 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998625795]
[2023-11-06 22:24:34,693 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998625795] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:24:34,693 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:24:34,695 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:24:34,695 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455634629]
[2023-11-06 22:24:34,695 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:24:34,700 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:24:34,700 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:24:34,704 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:24:34,705 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:24:34,706 INFO  L87              Difference]: Start difference. First operand 6586 states and 10980 transitions. Second operand  has 7 states, 7 states have (on average 542.8571428571429) internal successors, (3800), 7 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:35,184 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:24:35,184 INFO  L93              Difference]: Finished difference Result 17943 states and 29918 transitions.
[2023-11-06 22:24:35,184 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:24:35,185 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 542.8571428571429) internal successors, (3800), 7 states have internal predecessors, (3800), 0 states have call successors, (0), 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 4267
[2023-11-06 22:24:35,190 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:24:35,200 INFO  L225             Difference]: With dead ends: 17943
[2023-11-06 22:24:35,201 INFO  L226             Difference]: Without dead ends: 12243
[2023-11-06 22:24:35,206 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4276 GetRequests, 4264 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:24:35,206 INFO  L413           NwaCegarLoop]: 10915 mSDtfsCounter, 27301 mSDsluCounter, 42471 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27301 SdHoareTripleChecker+Valid, 53386 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:24:35,207 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27301 Valid, 53386 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:24:35,220 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12243 states.
[2023-11-06 22:24:35,317 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12243 to 6588.
[2023-11-06 22:24:35,325 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6588 states, 6587 states have (on average 1.6672233186579626) internal successors, (10982), 6587 states have internal predecessors, (10982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:35,339 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6588 states to 6588 states and 10982 transitions.
[2023-11-06 22:24:35,340 INFO  L78                 Accepts]: Start accepts. Automaton has 6588 states and 10982 transitions. Word has length 4267
[2023-11-06 22:24:35,343 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:24:35,343 INFO  L495      AbstractCegarLoop]: Abstraction has 6588 states and 10982 transitions.
[2023-11-06 22:24:35,344 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 542.8571428571429) internal successors, (3800), 7 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:35,345 INFO  L276                IsEmpty]: Start isEmpty. Operand 6588 states and 10982 transitions.
[2023-11-06 22:24:35,538 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4269
[2023-11-06 22:24:35,538 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:24:35,540 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:24:35,597 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0
[2023-11-06 22:24:35,741 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-06 22:24:35,742 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:24:35,742 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:24:35,743 INFO  L85        PathProgramCache]: Analyzing trace with hash -409475311, now seen corresponding path program 1 times
[2023-11-06 22:24:35,744 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:24:35,744 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687578863]
[2023-11-06 22:24:35,745 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:24:35,745 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:24:36,150 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:24:36,150 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427918607]
[2023-11-06 22:24:36,152 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:24:36,152 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:24:36,153 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:24:36,154 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:24:36,180 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-06 22:24:42,204 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:24:42,333 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17738 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:24:42,591 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:24:42,894 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked.
[2023-11-06 22:24:42,894 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:24:42,895 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:24:42,895 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687578863]
[2023-11-06 22:24:42,895 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:24:42,895 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427918607]
[2023-11-06 22:24:42,896 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [427918607] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:24:42,896 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:24:42,897 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:24:42,897 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805397451]
[2023-11-06 22:24:42,897 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:24:42,901 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:24:42,901 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:24:42,905 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:24:42,905 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:24:42,907 INFO  L87              Difference]: Start difference. First operand 6588 states and 10982 transitions. Second operand  has 7 states, 7 states have (on average 543.2857142857143) internal successors, (3803), 7 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:43,421 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:24:43,422 INFO  L93              Difference]: Finished difference Result 17949 states and 29924 transitions.
[2023-11-06 22:24:43,422 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:24:43,423 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 543.2857142857143) internal successors, (3803), 7 states have internal predecessors, (3803), 0 states have call successors, (0), 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 4268
[2023-11-06 22:24:43,428 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:24:43,439 INFO  L225             Difference]: With dead ends: 17949
[2023-11-06 22:24:43,439 INFO  L226             Difference]: Without dead ends: 12244
[2023-11-06 22:24:43,444 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4277 GetRequests, 4265 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:24:43,445 INFO  L413           NwaCegarLoop]: 10910 mSDtfsCounter, 27300 mSDsluCounter, 42456 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27300 SdHoareTripleChecker+Valid, 53366 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:24:43,446 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27300 Valid, 53366 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:24:43,462 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12244 states.
[2023-11-06 22:24:43,576 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12244 to 6590.
[2023-11-06 22:24:43,584 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6590 states, 6589 states have (on average 1.6670207922294733) internal successors, (10984), 6589 states have internal predecessors, (10984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:43,743 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6590 states to 6590 states and 10984 transitions.
[2023-11-06 22:24:43,743 INFO  L78                 Accepts]: Start accepts. Automaton has 6590 states and 10984 transitions. Word has length 4268
[2023-11-06 22:24:43,747 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:24:43,747 INFO  L495      AbstractCegarLoop]: Abstraction has 6590 states and 10984 transitions.
[2023-11-06 22:24:43,748 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 543.2857142857143) internal successors, (3803), 7 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:43,748 INFO  L276                IsEmpty]: Start isEmpty. Operand 6590 states and 10984 transitions.
[2023-11-06 22:24:43,896 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4270
[2023-11-06 22:24:43,896 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:24:43,898 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:24:43,976 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0
[2023-11-06 22:24:44,124 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-06 22:24:44,124 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:24:44,125 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:24:44,126 INFO  L85        PathProgramCache]: Analyzing trace with hash 1516509283, now seen corresponding path program 1 times
[2023-11-06 22:24:44,126 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:24:44,126 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867046867]
[2023-11-06 22:24:44,127 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:24:44,127 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:24:44,653 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:24:44,653 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022863631]
[2023-11-06 22:24:44,654 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:24:44,655 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:24:44,655 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:24:44,656 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:24:44,666 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-06 22:24:50,685 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:24:50,809 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17741 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-06 22:24:50,863 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:24:51,200 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked.
[2023-11-06 22:24:51,201 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:24:51,201 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:24:51,201 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867046867]
[2023-11-06 22:24:51,201 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:24:51,201 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022863631]
[2023-11-06 22:24:51,201 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022863631] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:24:51,201 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:24:51,203 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-06 22:24:51,203 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952822599]
[2023-11-06 22:24:51,204 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:24:51,207 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-06 22:24:51,208 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:24:51,212 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-06 22:24:51,213 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:24:51,214 INFO  L87              Difference]: Start difference. First operand 6590 states and 10984 transitions. Second operand  has 8 states, 8 states have (on average 475.75) internal successors, (3806), 8 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:51,913 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:24:51,913 INFO  L93              Difference]: Finished difference Result 17955 states and 29930 transitions.
[2023-11-06 22:24:51,914 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:24:51,915 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 475.75) internal successors, (3806), 8 states have internal predecessors, (3806), 0 states have call successors, (0), 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 4269
[2023-11-06 22:24:51,918 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:24:51,928 INFO  L225             Difference]: With dead ends: 17955
[2023-11-06 22:24:51,929 INFO  L226             Difference]: Without dead ends: 12245
[2023-11-06 22:24:51,936 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4278 GetRequests, 4265 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-06 22:24:51,936 INFO  L413           NwaCegarLoop]: 10905 mSDtfsCounter, 27299 mSDsluCounter, 51850 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27299 SdHoareTripleChecker+Valid, 62755 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:24:51,937 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27299 Valid, 62755 Invalid, 53 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:24:51,949 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12245 states.
[2023-11-06 22:24:52,057 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12245 to 6592.
[2023-11-06 22:24:52,064 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6592 states, 6591 states have (on average 1.66681838871188) internal successors, (10986), 6591 states have internal predecessors, (10986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:52,079 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6592 states to 6592 states and 10986 transitions.
[2023-11-06 22:24:52,079 INFO  L78                 Accepts]: Start accepts. Automaton has 6592 states and 10986 transitions. Word has length 4269
[2023-11-06 22:24:52,082 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:24:52,083 INFO  L495      AbstractCegarLoop]: Abstraction has 6592 states and 10986 transitions.
[2023-11-06 22:24:52,084 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 475.75) internal successors, (3806), 8 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:52,084 INFO  L276                IsEmpty]: Start isEmpty. Operand 6592 states and 10986 transitions.
[2023-11-06 22:24:52,249 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4271
[2023-11-06 22:24:52,249 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:24:52,250 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:24:52,305 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0
[2023-11-06 22:24:52,451 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:24:52,452 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:24:52,452 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:24:52,453 INFO  L85        PathProgramCache]: Analyzing trace with hash 1839997931, now seen corresponding path program 1 times
[2023-11-06 22:24:52,453 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:24:52,453 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917754747]
[2023-11-06 22:24:52,454 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:24:52,454 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:24:52,860 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:24:52,860 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162981507]
[2023-11-06 22:24:52,861 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:24:52,862 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:24:52,862 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:24:52,863 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:24:52,869 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-06 22:24:58,761 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:24:58,887 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17744 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:24:58,939 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:24:59,425 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked.
[2023-11-06 22:24:59,426 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:24:59,426 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:24:59,426 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917754747]
[2023-11-06 22:24:59,426 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:24:59,426 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162981507]
[2023-11-06 22:24:59,426 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [162981507] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:24:59,427 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:24:59,428 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:24:59,428 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289542929]
[2023-11-06 22:24:59,428 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:24:59,431 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:24:59,431 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:24:59,434 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:24:59,434 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:24:59,435 INFO  L87              Difference]: Start difference. First operand 6592 states and 10986 transitions. Second operand  has 7 states, 7 states have (on average 544.1428571428571) internal successors, (3809), 7 states have internal predecessors, (3809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:24:59,933 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:24:59,933 INFO  L93              Difference]: Finished difference Result 17961 states and 29936 transitions.
[2023-11-06 22:24:59,933 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:24:59,934 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 544.1428571428571) internal successors, (3809), 7 states have internal predecessors, (3809), 0 states have call successors, (0), 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 4270
[2023-11-06 22:24:59,938 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:24:59,951 INFO  L225             Difference]: With dead ends: 17961
[2023-11-06 22:24:59,951 INFO  L226             Difference]: Without dead ends: 12246
[2023-11-06 22:24:59,959 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4279 GetRequests, 4267 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:24:59,960 INFO  L413           NwaCegarLoop]: 10900 mSDtfsCounter, 27298 mSDsluCounter, 42426 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27298 SdHoareTripleChecker+Valid, 53326 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:24:59,960 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27298 Valid, 53326 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:24:59,977 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12246 states.
[2023-11-06 22:25:00,070 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12246 to 6594.
[2023-11-06 22:25:00,077 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6594 states, 6593 states have (on average 1.6666161079933262) internal successors, (10988), 6593 states have internal predecessors, (10988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:25:00,088 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6594 states to 6594 states and 10988 transitions.
[2023-11-06 22:25:00,088 INFO  L78                 Accepts]: Start accepts. Automaton has 6594 states and 10988 transitions. Word has length 4270
[2023-11-06 22:25:00,091 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:25:00,091 INFO  L495      AbstractCegarLoop]: Abstraction has 6594 states and 10988 transitions.
[2023-11-06 22:25:00,092 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 544.1428571428571) internal successors, (3809), 7 states have internal predecessors, (3809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:25:00,092 INFO  L276                IsEmpty]: Start isEmpty. Operand 6594 states and 10988 transitions.
[2023-11-06 22:25:00,282 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4272
[2023-11-06 22:25:00,282 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:25:00,283 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:25:00,338 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0
[2023-11-06 22:25:00,484 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:25:00,484 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:25:00,484 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:25:00,485 INFO  L85        PathProgramCache]: Analyzing trace with hash -1400096631, now seen corresponding path program 1 times
[2023-11-06 22:25:00,485 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:25:00,485 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350313736]
[2023-11-06 22:25:00,486 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:25:00,486 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:25:00,886 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:25:00,887 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663402997]
[2023-11-06 22:25:00,888 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:25:00,889 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:25:00,889 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:25:00,890 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:25:00,895 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-06 22:25:06,858 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:25:06,983 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17747 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-06 22:25:07,038 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:25:07,518 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked.
[2023-11-06 22:25:07,518 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-06 22:25:07,518 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:25:07,518 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350313736]
[2023-11-06 22:25:07,518 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:25:07,519 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663402997]
[2023-11-06 22:25:07,519 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663402997] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:25:07,519 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:25:07,521 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-06 22:25:07,521 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745369627]
[2023-11-06 22:25:07,521 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:25:07,523 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-06 22:25:07,523 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:25:07,526 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-06 22:25:07,526 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-06 22:25:07,527 INFO  L87              Difference]: Start difference. First operand 6594 states and 10988 transitions. Second operand  has 7 states, 7 states have (on average 544.5714285714286) internal successors, (3812), 7 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:25:08,019 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:25:08,019 INFO  L93              Difference]: Finished difference Result 17967 states and 29942 transitions.
[2023-11-06 22:25:08,019 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-06 22:25:08,020 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 544.5714285714286) internal successors, (3812), 7 states have internal predecessors, (3812), 0 states have call successors, (0), 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 4271
[2023-11-06 22:25:08,023 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:25:08,033 INFO  L225             Difference]: With dead ends: 17967
[2023-11-06 22:25:08,033 INFO  L226             Difference]: Without dead ends: 12247
[2023-11-06 22:25:08,038 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4280 GetRequests, 4268 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-06 22:25:08,039 INFO  L413           NwaCegarLoop]: 10895 mSDtfsCounter, 27297 mSDsluCounter, 42411 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27297 SdHoareTripleChecker+Valid, 53306 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:25:08,040 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [27297 Valid, 53306 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:25:08,053 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12247 states.
[2023-11-06 22:25:08,133 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12247 to 6596.
[2023-11-06 22:25:08,140 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6596 states, 6595 states have (on average 1.6664139499620925) internal successors, (10990), 6595 states have internal predecessors, (10990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:25:08,154 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 10990 transitions.
[2023-11-06 22:25:08,155 INFO  L78                 Accepts]: Start accepts. Automaton has 6596 states and 10990 transitions. Word has length 4271
[2023-11-06 22:25:08,158 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:25:08,159 INFO  L495      AbstractCegarLoop]: Abstraction has 6596 states and 10990 transitions.
[2023-11-06 22:25:08,160 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 544.5714285714286) internal successors, (3812), 7 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-06 22:25:08,160 INFO  L276                IsEmpty]: Start isEmpty. Operand 6596 states and 10990 transitions.
[2023-11-06 22:25:08,362 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4273
[2023-11-06 22:25:08,363 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:25:08,364 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-06 22:25:08,419 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-06 22:25:08,572 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:25:08,572 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:25:08,573 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:25:08,574 INFO  L85        PathProgramCache]: Analyzing trace with hash 552193095, now seen corresponding path program 1 times
[2023-11-06 22:25:08,574 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:25:08,574 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345029064]
[2023-11-06 22:25:08,575 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:25:08,575 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:25:08,977 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:25:08,977 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518489182]
[2023-11-06 22:25:08,979 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:25:08,979 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:25:08,979 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:25:08,981 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:25:08,990 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa814276-9c3b-4ad5-a6f2-69b6a76b33b5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process