./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sokoban.3.prop1-func-interl.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sokoban.3.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a09099c9db7928f6f22271aac5895b3fd1d8a20ec6ae13e9a795dab1c1b19eb5
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-29 06:24:44,689 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-29 06:24:44,748 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-29 06:24:44,753 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-29 06:24:44,754 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-29 06:24:44,776 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-29 06:24:44,776 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-29 06:24:44,777 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-29 06:24:44,777 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-29 06:24:44,778 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-29 06:24:44,778 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-29 06:24:44,779 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-29 06:24:44,780 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-29 06:24:44,780 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-29 06:24:44,781 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-29 06:24:44,781 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-29 06:24:44,782 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-29 06:24:44,782 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-29 06:24:44,783 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-29 06:24:44,783 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-29 06:24:44,784 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-29 06:24:44,784 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-29 06:24:44,785 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-29 06:24:44,785 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-29 06:24:44,786 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-29 06:24:44,786 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-29 06:24:44,787 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-29 06:24:44,787 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-29 06:24:44,788 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 06:24:44,788 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-29 06:24:44,788 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-29 06:24:44,789 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-29 06:24:44,789 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-29 06:24:44,789 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-29 06:24:44,789 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-29 06:24:44,790 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-29 06:24:44,790 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-29 06:24:44,790 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-29 06:24:44,790 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-29 06:24:44,790 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_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a09099c9db7928f6f22271aac5895b3fd1d8a20ec6ae13e9a795dab1c1b19eb5
[2023-11-29 06:24:44,980 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-29 06:24:45,001 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-29 06:24:45,004 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-29 06:24:45,005 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-29 06:24:45,005 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-29 06:24:45,007 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sokoban.3.prop1-func-interl.c
[2023-11-29 06:24:47,879 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-29 06:24:48,452 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-29 06:24:48,453 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sokoban.3.prop1-func-interl.c
[2023-11-29 06:24:48,540 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/data/fd903c929/09426eec21e24ca1b985d83ceb53a9a7/FLAG91571a4fb
[2023-11-29 06:24:48,555 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/data/fd903c929/09426eec21e24ca1b985d83ceb53a9a7
[2023-11-29 06:24:48,558 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-29 06:24:48,559 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-29 06:24:48,561 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-29 06:24:48,561 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-29 06:24:48,566 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-29 06:24:48,567 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:24:48" (1/1) ...
[2023-11-29 06:24:48,568 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb673bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:48, skipping insertion in model container
[2023-11-29 06:24:48,568 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:24:48" (1/1) ...
[2023-11-29 06:24:48,868 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-29 06:24:49,285 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_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sokoban.3.prop1-func-interl.c[1174,1187]
[2023-11-29 06:24:51,250 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 06:24:51,265 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-29 06:24:51,279 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_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sokoban.3.prop1-func-interl.c[1174,1187]
[2023-11-29 06:24:52,860 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 06:24:52,876 INFO  L206         MainTranslator]: Completed translation
[2023-11-29 06:24:52,877 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:52 WrapperNode
[2023-11-29 06:24:52,877 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-29 06:24:52,878 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-29 06:24:52,879 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-29 06:24:52,879 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-29 06:24:52,887 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:52" (1/1) ...
[2023-11-29 06:24:53,228 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:52" (1/1) ...
[2023-11-29 06:24:56,425 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60390
[2023-11-29 06:24:56,426 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-29 06:24:56,426 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-29 06:24:56,426 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-29 06:24:56,426 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-29 06:24:56,436 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:52" (1/1) ...
[2023-11-29 06:24:56,436 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:52" (1/1) ...
[2023-11-29 06:24:57,353 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:52" (1/1) ...
[2023-11-29 06:24:57,944 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2023-11-29 06:24:57,944 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:52" (1/1) ...
[2023-11-29 06:24:57,944 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:52" (1/1) ...
[2023-11-29 06:24:58,752 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:52" (1/1) ...
[2023-11-29 06:24:58,878 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:52" (1/1) ...
[2023-11-29 06:24:59,037 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:52" (1/1) ...
[2023-11-29 06:24:59,176 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:52" (1/1) ...
[2023-11-29 06:24:59,982 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-29 06:24:59,982 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-29 06:24:59,983 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-29 06:24:59,983 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-29 06:24:59,983 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:52" (1/1) ...
[2023-11-29 06:24:59,988 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 06:24:59,996 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:25:00,014 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-29 06:25:00,016 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-29 06:25:00,041 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-29 06:25:00,041 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-29 06:25:00,041 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-29 06:25:00,041 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-29 06:25:02,895 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-29 06:25:02,897 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-29 06:25:37,897 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-29 06:25:39,078 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-29 06:25:39,078 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-29 06:25:39,083 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:25:39 BoogieIcfgContainer
[2023-11-29 06:25:39,083 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-29 06:25:39,086 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-29 06:25:39,086 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-29 06:25:39,089 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-29 06:25:39,090 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:24:48" (1/3) ...
[2023-11-29 06:25:39,091 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bcc78bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:25:39, skipping insertion in model container
[2023-11-29 06:25:39,091 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:24:52" (2/3) ...
[2023-11-29 06:25:39,091 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bcc78bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:25:39, skipping insertion in model container
[2023-11-29 06:25:39,091 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:25:39" (3/3) ...
[2023-11-29 06:25:39,093 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.sokoban.3.prop1-func-interl.c
[2023-11-29 06:25:39,112 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-29 06:25:39,113 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-29 06:25:39,301 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-29 06:25:39,308 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3ed7bddc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-29 06:25:39,308 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-29 06:25:39,343 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 9850 states, 9848 states have (on average 1.677497969130788) internal successors, (16520), 9849 states have internal predecessors, (16520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:25:39,375 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 457
[2023-11-29 06:25:39,375 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:25:39,376 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]
[2023-11-29 06:25:39,377 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:25:39,382 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:25:39,382 INFO  L85        PathProgramCache]: Analyzing trace with hash -1669219083, now seen corresponding path program 1 times
[2023-11-29 06:25:39,391 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:25:39,392 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834465909]
[2023-11-29 06:25:39,392 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:25:39,392 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:25:40,094 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:25:42,115 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:25:42,115 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:25:42,116 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834465909]
[2023-11-29 06:25:42,116 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834465909] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:25:42,117 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:25:42,117 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:25:42,119 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630838888]
[2023-11-29 06:25:42,119 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:25:42,125 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 06:25:42,126 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:25:42,155 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 06:25:42,156 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 06:25:42,185 INFO  L87              Difference]: Start difference. First operand  has 9850 states, 9848 states have (on average 1.677497969130788) internal successors, (16520), 9849 states have internal predecessors, (16520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:25:42,879 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:25:42,879 INFO  L93              Difference]: Finished difference Result 19057 states and 31971 transitions.
[2023-11-29 06:25:42,880 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 06:25:42,882 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 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 456
[2023-11-29 06:25:42,885 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:25:42,955 INFO  L225             Difference]: With dead ends: 19057
[2023-11-29 06:25:42,955 INFO  L226             Difference]: Without dead ends: 9850
[2023-11-29 06:25:42,972 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 06:25:42,975 INFO  L413           NwaCegarLoop]: 16513 mSDtfsCounter, 1 mSDsluCounter, 33021 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49534 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-29 06:25:42,977 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49534 Invalid, 13 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-29 06:25:43,014 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9850 states.
[2023-11-29 06:25:43,213 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9850 to 9850.
[2023-11-29 06:25:43,237 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9850 states, 9849 states have (on average 1.6771245811757538) internal successors, (16518), 9849 states have internal predecessors, (16518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:25:43,280 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9850 states to 9850 states and 16518 transitions.
[2023-11-29 06:25:43,281 INFO  L78                 Accepts]: Start accepts. Automaton has 9850 states and 16518 transitions. Word has length 456
[2023-11-29 06:25:43,283 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:25:43,283 INFO  L495      AbstractCegarLoop]: Abstraction has 9850 states and 16518 transitions.
[2023-11-29 06:25:43,284 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:25:43,284 INFO  L276                IsEmpty]: Start isEmpty. Operand 9850 states and 16518 transitions.
[2023-11-29 06:25:43,296 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 458
[2023-11-29 06:25:43,296 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:25:43,296 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]
[2023-11-29 06:25:43,297 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-29 06:25:43,297 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:25:43,297 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:25:43,298 INFO  L85        PathProgramCache]: Analyzing trace with hash -204396779, now seen corresponding path program 1 times
[2023-11-29 06:25:43,298 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:25:43,298 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94843610]
[2023-11-29 06:25:43,298 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:25:43,299 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:25:43,729 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:25:44,959 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:25:44,959 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:25:44,960 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94843610]
[2023-11-29 06:25:44,960 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94843610] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:25:44,960 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:25:44,960 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:25:44,961 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812058128]
[2023-11-29 06:25:44,961 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:25:44,963 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 06:25:44,963 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:25:44,965 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 06:25:44,965 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 06:25:44,966 INFO  L87              Difference]: Start difference. First operand 9850 states and 16518 transitions. Second operand  has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:25:45,595 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:25:45,596 INFO  L93              Difference]: Finished difference Result 19060 states and 31969 transitions.
[2023-11-29 06:25:45,596 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 06:25:45,597 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 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 457
[2023-11-29 06:25:45,599 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:25:45,658 INFO  L225             Difference]: With dead ends: 19060
[2023-11-29 06:25:45,658 INFO  L226             Difference]: Without dead ends: 9853
[2023-11-29 06:25:45,672 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 06:25:45,674 INFO  L413           NwaCegarLoop]: 16513 mSDtfsCounter, 1 mSDsluCounter, 33019 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49532 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-29 06:25:45,674 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49532 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-29 06:25:45,697 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9853 states.
[2023-11-29 06:25:45,886 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9853 to 9852.
[2023-11-29 06:25:45,904 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9852 states, 9851 states have (on average 1.6769871079078267) internal successors, (16520), 9851 states have internal predecessors, (16520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:25:45,947 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9852 states to 9852 states and 16520 transitions.
[2023-11-29 06:25:45,948 INFO  L78                 Accepts]: Start accepts. Automaton has 9852 states and 16520 transitions. Word has length 457
[2023-11-29 06:25:45,950 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:25:45,950 INFO  L495      AbstractCegarLoop]: Abstraction has 9852 states and 16520 transitions.
[2023-11-29 06:25:45,951 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:25:45,951 INFO  L276                IsEmpty]: Start isEmpty. Operand 9852 states and 16520 transitions.
[2023-11-29 06:25:45,962 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 459
[2023-11-29 06:25:45,962 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:25:45,963 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]
[2023-11-29 06:25:45,963 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-29 06:25:45,963 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:25:45,964 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:25:45,964 INFO  L85        PathProgramCache]: Analyzing trace with hash 2041417229, now seen corresponding path program 1 times
[2023-11-29 06:25:45,964 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:25:45,964 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799644135]
[2023-11-29 06:25:45,965 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:25:45,965 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:25:46,448 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:25:46,975 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:25:46,975 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:25:46,976 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799644135]
[2023-11-29 06:25:46,976 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799644135] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:25:46,976 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:25:46,977 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:25:46,977 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230621311]
[2023-11-29 06:25:46,977 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:25:46,978 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 06:25:46,978 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:25:46,980 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 06:25:46,980 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 06:25:46,980 INFO  L87              Difference]: Start difference. First operand 9852 states and 16520 transitions. Second operand  has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:25:47,482 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:25:47,482 INFO  L93              Difference]: Finished difference Result 28260 states and 47403 transitions.
[2023-11-29 06:25:47,482 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 06:25:47,483 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 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 458
[2023-11-29 06:25:47,484 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:25:47,530 INFO  L225             Difference]: With dead ends: 28260
[2023-11-29 06:25:47,530 INFO  L226             Difference]: Without dead ends: 19051
[2023-11-29 06:25:47,543 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 06:25:47,544 INFO  L413           NwaCegarLoop]: 16559 mSDtfsCounter, 15431 mSDsluCounter, 33061 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15431 SdHoareTripleChecker+Valid, 49620 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-29 06:25:47,545 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [15431 Valid, 49620 Invalid, 20 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-29 06:25:47,569 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19051 states.
[2023-11-29 06:25:47,825 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19051 to 9854.
[2023-11-29 06:25:47,839 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9854 states, 9853 states have (on average 1.6768496904496093) internal successors, (16522), 9853 states have internal predecessors, (16522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:25:47,855 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9854 states to 9854 states and 16522 transitions.
[2023-11-29 06:25:47,855 INFO  L78                 Accepts]: Start accepts. Automaton has 9854 states and 16522 transitions. Word has length 458
[2023-11-29 06:25:47,856 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:25:47,856 INFO  L495      AbstractCegarLoop]: Abstraction has 9854 states and 16522 transitions.
[2023-11-29 06:25:47,856 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:25:47,857 INFO  L276                IsEmpty]: Start isEmpty. Operand 9854 states and 16522 transitions.
[2023-11-29 06:25:47,863 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 460
[2023-11-29 06:25:47,864 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:25:47,864 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:25:47,864 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-29 06:25:47,865 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:25:47,865 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:25:47,865 INFO  L85        PathProgramCache]: Analyzing trace with hash 457546683, now seen corresponding path program 1 times
[2023-11-29 06:25:47,865 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:25:47,866 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395563476]
[2023-11-29 06:25:47,866 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:25:47,866 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:25:48,201 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:25:49,143 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:25:49,143 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:25:49,143 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395563476]
[2023-11-29 06:25:49,143 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395563476] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:25:49,144 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:25:49,144 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:25:49,144 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601915325]
[2023-11-29 06:25:49,144 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:25:49,145 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:25:49,145 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:25:49,146 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:25:49,146 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:25:49,146 INFO  L87              Difference]: Start difference. First operand 9854 states and 16522 transitions. Second operand  has 5 states, 5 states have (on average 91.8) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:26:01,098 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:26:01,098 INFO  L93              Difference]: Finished difference Result 28274 states and 47422 transitions.
[2023-11-29 06:26:01,098 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:26:01,099 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 91.8) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 459
[2023-11-29 06:26:01,100 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:26:01,136 INFO  L225             Difference]: With dead ends: 28274
[2023-11-29 06:26:01,137 INFO  L226             Difference]: Without dead ends: 19063
[2023-11-29 06:26:01,149 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:26:01,150 INFO  L413           NwaCegarLoop]: 13028 mSDtfsCounter, 46956 mSDsluCounter, 26050 mSDsCounter, 0 mSdLazyCounter, 10469 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46956 SdHoareTripleChecker+Valid, 39078 SdHoareTripleChecker+Invalid, 10470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time
[2023-11-29 06:26:01,151 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46956 Valid, 39078 Invalid, 10470 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 10469 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time]
[2023-11-29 06:26:01,173 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19063 states.
[2023-11-29 06:26:01,354 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19063 to 9884.
[2023-11-29 06:26:01,370 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6766164120206415) internal successors, (16570), 9883 states have internal predecessors, (16570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:26:01,402 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16570 transitions.
[2023-11-29 06:26:01,403 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16570 transitions. Word has length 459
[2023-11-29 06:26:01,404 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:26:01,404 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16570 transitions.
[2023-11-29 06:26:01,404 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 91.8) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:26:01,404 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16570 transitions.
[2023-11-29 06:26:01,414 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 460
[2023-11-29 06:26:01,415 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:26:01,415 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:26:01,415 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-29 06:26:01,416 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:26:01,416 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:26:01,416 INFO  L85        PathProgramCache]: Analyzing trace with hash 64519673, now seen corresponding path program 1 times
[2023-11-29 06:26:01,416 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:26:01,417 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309036040]
[2023-11-29 06:26:01,417 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:26:01,417 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:26:01,855 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:26:04,044 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:26:04,044 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:26:04,045 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309036040]
[2023-11-29 06:26:04,045 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309036040] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:26:04,045 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:26:04,045 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-29 06:26:04,046 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489067984]
[2023-11-29 06:26:04,046 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:26:04,047 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 06:26:04,047 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:26:04,048 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 06:26:04,048 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-29 06:26:04,049 INFO  L87              Difference]: Start difference. First operand 9884 states and 16570 transitions. Second operand  has 7 states, 7 states have (on average 65.57142857142857) internal successors, (459), 6 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:26:07,361 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:26:07,362 INFO  L93              Difference]: Finished difference Result 28294 states and 47455 transitions.
[2023-11-29 06:26:07,362 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 06:26:07,362 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 65.57142857142857) internal successors, (459), 6 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 459
[2023-11-29 06:26:07,363 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:26:07,391 INFO  L225             Difference]: With dead ends: 28294
[2023-11-29 06:26:07,391 INFO  L226             Difference]: Without dead ends: 19083
[2023-11-29 06:26:07,403 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110
[2023-11-29 06:26:07,404 INFO  L413           NwaCegarLoop]: 16250 mSDtfsCounter, 77848 mSDsluCounter, 64854 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77848 SdHoareTripleChecker+Valid, 81104 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time
[2023-11-29 06:26:07,404 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [77848 Valid, 81104 Invalid, 1569 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time]
[2023-11-29 06:26:07,427 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19083 states.
[2023-11-29 06:26:07,595 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19083 to 9884.
[2023-11-29 06:26:07,610 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6766164120206415) internal successors, (16570), 9883 states have internal predecessors, (16570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:26:07,628 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16570 transitions.
[2023-11-29 06:26:07,628 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16570 transitions. Word has length 459
[2023-11-29 06:26:07,629 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:26:07,629 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16570 transitions.
[2023-11-29 06:26:07,630 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 65.57142857142857) internal successors, (459), 6 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:26:07,630 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16570 transitions.
[2023-11-29 06:26:07,824 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6384
[2023-11-29 06:26:07,824 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:26:07,829 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:26:07,829 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-11-29 06:26:07,829 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:26:07,830 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:26:07,832 INFO  L85        PathProgramCache]: Analyzing trace with hash 2050492181, now seen corresponding path program 1 times
[2023-11-29 06:26:07,832 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:26:07,833 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3450238]
[2023-11-29 06:26:07,834 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:26:07,834 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:26:09,137 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:26:09,138 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661828038]
[2023-11-29 06:26:09,139 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:26:09,140 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:26:09,140 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:26:09,141 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:26:09,144 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-29 06:26:31,642 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:26:32,128 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63785 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-29 06:26:32,357 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:26:34,948 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:26:34,948 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:26:34,949 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:26:34,949 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3450238]
[2023-11-29 06:26:34,949 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:26:34,949 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661828038]
[2023-11-29 06:26:34,949 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661828038] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:26:34,949 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:26:34,951 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 06:26:34,952 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678722980]
[2023-11-29 06:26:34,952 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:26:34,960 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 06:26:34,960 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:26:34,966 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 06:26:34,967 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 06:26:34,969 INFO  L87              Difference]: Start difference. First operand 9884 states and 16570 transitions. Second operand  has 4 states, 4 states have (on average 1595.75) internal successors, (6383), 3 states have internal predecessors, (6383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:26:39,969 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:26:39,969 INFO  L93              Difference]: Finished difference Result 19182 states and 32162 transitions.
[2023-11-29 06:26:39,969 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 06:26:39,971 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1595.75) internal successors, (6383), 3 states have internal predecessors, (6383), 0 states have call successors, (0), 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 6383
[2023-11-29 06:26:39,972 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:26:39,982 INFO  L225             Difference]: With dead ends: 19182
[2023-11-29 06:26:39,982 INFO  L226             Difference]: Without dead ends: 9971
[2023-11-29 06:26:39,994 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6383 GetRequests, 6380 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:26:39,995 INFO  L413           NwaCegarLoop]: 12852 mSDtfsCounter, 31450 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 3917 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31450 SdHoareTripleChecker+Valid, 14046 SdHoareTripleChecker+Invalid, 3917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:26:39,996 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31450 Valid, 14046 Invalid, 3917 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 3917 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time]
[2023-11-29 06:26:40,011 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9971 states.
[2023-11-29 06:26:40,120 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9971 to 9884.
[2023-11-29 06:26:40,131 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.676515228169584) internal successors, (16569), 9883 states have internal predecessors, (16569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:26:40,144 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16569 transitions.
[2023-11-29 06:26:40,145 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16569 transitions. Word has length 6383
[2023-11-29 06:26:40,147 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:26:40,147 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16569 transitions.
[2023-11-29 06:26:40,149 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1595.75) internal successors, (6383), 3 states have internal predecessors, (6383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:26:40,149 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16569 transitions.
[2023-11-29 06:26:40,444 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6385
[2023-11-29 06:26:40,444 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:26:40,448 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:26:40,648 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forcibly destroying the process
[2023-11-29 06:26:40,657 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-29 06:26:40,658 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-11-29 06:26:40,658 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:26:40,659 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:26:40,662 INFO  L85        PathProgramCache]: Analyzing trace with hash 544314073, now seen corresponding path program 1 times
[2023-11-29 06:26:40,662 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:26:40,662 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79443853]
[2023-11-29 06:26:40,663 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:26:40,664 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:26:41,695 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:26:41,695 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557025599]
[2023-11-29 06:26:41,697 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:26:41,697 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:26:41,698 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:26:41,698 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:26:41,701 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-29 06:27:03,509 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:27:03,952 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63786 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:27:04,159 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:27:05,130 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:27:05,130 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:27:05,130 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:27:05,130 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79443853]
[2023-11-29 06:27:05,131 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:27:05,131 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557025599]
[2023-11-29 06:27:05,131 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557025599] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:27:05,131 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:27:05,133 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:27:05,133 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773036174]
[2023-11-29 06:27:05,133 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:27:05,138 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:27:05,138 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:27:05,143 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:27:05,143 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:27:05,146 INFO  L87              Difference]: Start difference. First operand 9884 states and 16569 transitions. Second operand  has 5 states, 5 states have (on average 1276.8) internal successors, (6384), 4 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:27:06,093 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:27:06,093 INFO  L93              Difference]: Finished difference Result 19186 states and 32166 transitions.
[2023-11-29 06:27:06,093 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:27:06,095 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1276.8) internal successors, (6384), 4 states have internal predecessors, (6384), 0 states have call successors, (0), 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 6384
[2023-11-29 06:27:06,096 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:27:06,103 INFO  L225             Difference]: With dead ends: 19186
[2023-11-29 06:27:06,104 INFO  L226             Difference]: Without dead ends: 9975
[2023-11-29 06:27:06,112 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6384 GetRequests, 6380 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:27:06,113 INFO  L413           NwaCegarLoop]: 16387 mSDtfsCounter, 46887 mSDsluCounter, 2515 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46887 SdHoareTripleChecker+Valid, 18902 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:27:06,113 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46887 Valid, 18902 Invalid, 331 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:27:06,127 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9975 states.
[2023-11-29 06:27:06,231 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9975 to 9884.
[2023-11-29 06:27:06,243 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6764140443185267) internal successors, (16568), 9883 states have internal predecessors, (16568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:27:06,256 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16568 transitions.
[2023-11-29 06:27:06,257 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16568 transitions. Word has length 6384
[2023-11-29 06:27:06,259 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:27:06,259 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16568 transitions.
[2023-11-29 06:27:06,261 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1276.8) internal successors, (6384), 4 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:27:06,261 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16568 transitions.
[2023-11-29 06:27:06,507 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6386
[2023-11-29 06:27:06,507 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:27:06,511 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:27:06,711 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forcibly destroying the process
[2023-11-29 06:27:06,717 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-29 06:27:06,717 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:27:06,718 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:27:06,718 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:27:06,721 INFO  L85        PathProgramCache]: Analyzing trace with hash 614141578, now seen corresponding path program 1 times
[2023-11-29 06:27:06,721 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:27:06,722 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36464419]
[2023-11-29 06:27:06,722 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:27:06,722 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:27:07,888 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:27:07,888 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419112237]
[2023-11-29 06:27:07,890 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:27:07,890 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:27:07,890 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:27:07,891 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:27:07,894 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-29 06:27:29,737 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:27:30,203 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63787 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:27:30,349 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:27:31,063 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:27:31,063 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:27:31,064 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:27:31,064 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36464419]
[2023-11-29 06:27:31,064 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:27:31,064 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419112237]
[2023-11-29 06:27:31,064 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419112237] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:27:31,064 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:27:31,066 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:27:31,067 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584283047]
[2023-11-29 06:27:31,067 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:27:31,072 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:27:31,073 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:27:31,077 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:27:31,078 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:27:31,079 INFO  L87              Difference]: Start difference. First operand 9884 states and 16568 transitions. Second operand  has 5 states, 5 states have (on average 1277.0) internal successors, (6385), 4 states have internal predecessors, (6385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:27:32,104 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:27:32,104 INFO  L93              Difference]: Finished difference Result 19226 states and 32230 transitions.
[2023-11-29 06:27:32,105 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:27:32,106 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1277.0) internal successors, (6385), 4 states have internal predecessors, (6385), 0 states have call successors, (0), 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 6385
[2023-11-29 06:27:32,107 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:27:32,113 INFO  L225             Difference]: With dead ends: 19226
[2023-11-29 06:27:32,114 INFO  L226             Difference]: Without dead ends: 10015
[2023-11-29 06:27:32,119 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6385 GetRequests, 6381 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:27:32,119 INFO  L413           NwaCegarLoop]: 16451 mSDtfsCounter, 31633 mSDsluCounter, 2580 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31633 SdHoareTripleChecker+Valid, 19031 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-29 06:27:32,120 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31633 Valid, 19031 Invalid, 333 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-29 06:27:32,132 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10015 states.
[2023-11-29 06:27:32,218 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10015 to 9884.
[2023-11-29 06:27:32,227 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6763128604674693) internal successors, (16567), 9883 states have internal predecessors, (16567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:27:32,240 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16567 transitions.
[2023-11-29 06:27:32,241 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16567 transitions. Word has length 6385
[2023-11-29 06:27:32,243 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:27:32,243 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16567 transitions.
[2023-11-29 06:27:32,244 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1277.0) internal successors, (6385), 4 states have internal predecessors, (6385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:27:32,244 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16567 transitions.
[2023-11-29 06:27:32,419 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6387
[2023-11-29 06:27:32,419 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:27:32,423 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:27:32,623 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forcibly destroying the process
[2023-11-29 06:27:32,648 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-29 06:27:32,649 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:27:32,649 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:27:32,649 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:27:32,652 INFO  L85        PathProgramCache]: Analyzing trace with hash -854454682, now seen corresponding path program 1 times
[2023-11-29 06:27:32,652 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:27:32,652 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984362410]
[2023-11-29 06:27:32,653 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:27:32,654 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:27:33,708 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:27:33,709 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908637346]
[2023-11-29 06:27:33,710 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:27:33,710 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:27:33,710 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:27:33,711 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:27:33,713 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-29 06:27:55,685 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:27:56,132 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63788 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:27:56,309 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:27:57,061 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:27:57,061 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:27:57,061 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:27:57,061 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984362410]
[2023-11-29 06:27:57,061 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:27:57,061 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908637346]
[2023-11-29 06:27:57,061 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908637346] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:27:57,061 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:27:57,063 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:27:57,063 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065217764]
[2023-11-29 06:27:57,063 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:27:57,068 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:27:57,068 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:27:57,073 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:27:57,073 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:27:57,075 INFO  L87              Difference]: Start difference. First operand 9884 states and 16567 transitions. Second operand  has 5 states, 5 states have (on average 1277.2) internal successors, (6386), 4 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:27:58,057 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:27:58,057 INFO  L93              Difference]: Finished difference Result 19230 states and 32234 transitions.
[2023-11-29 06:27:58,058 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:27:58,059 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1277.2) internal successors, (6386), 4 states have internal predecessors, (6386), 0 states have call successors, (0), 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 6386
[2023-11-29 06:27:58,060 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:27:58,068 INFO  L225             Difference]: With dead ends: 19230
[2023-11-29 06:27:58,068 INFO  L226             Difference]: Without dead ends: 10019
[2023-11-29 06:27:58,074 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6386 GetRequests, 6382 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:27:58,074 INFO  L413           NwaCegarLoop]: 16455 mSDtfsCounter, 31631 mSDsluCounter, 2585 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31631 SdHoareTripleChecker+Valid, 19040 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-29 06:27:58,075 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31631 Valid, 19040 Invalid, 335 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-29 06:27:58,088 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10019 states.
[2023-11-29 06:27:58,208 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10019 to 9884.
[2023-11-29 06:27:58,217 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6762116766164121) internal successors, (16566), 9883 states have internal predecessors, (16566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:27:58,231 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16566 transitions.
[2023-11-29 06:27:58,231 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16566 transitions. Word has length 6386
[2023-11-29 06:27:58,233 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:27:58,233 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16566 transitions.
[2023-11-29 06:27:58,234 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1277.2) internal successors, (6386), 4 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:27:58,235 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16566 transitions.
[2023-11-29 06:27:58,533 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6388
[2023-11-29 06:27:58,533 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:27:58,536 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:27:58,737 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forcibly destroying the process
[2023-11-29 06:27:58,740 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-29 06:27:58,740 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:27:58,740 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:27:58,741 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:27:58,745 INFO  L85        PathProgramCache]: Analyzing trace with hash 1905863295, now seen corresponding path program 1 times
[2023-11-29 06:27:58,745 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:27:58,745 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823389030]
[2023-11-29 06:27:58,746 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:27:58,746 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:27:59,964 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:27:59,965 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828371198]
[2023-11-29 06:27:59,967 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:27:59,967 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:27:59,967 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:27:59,983 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:27:59,992 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 06:28:20,803 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:28:21,245 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63789 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:28:21,506 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:28:22,151 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:28:22,151 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:28:22,151 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:28:22,151 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823389030]
[2023-11-29 06:28:22,151 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:28:22,152 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828371198]
[2023-11-29 06:28:22,152 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828371198] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:28:22,152 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:28:22,153 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:28:22,153 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191400008]
[2023-11-29 06:28:22,154 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:28:22,158 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:28:22,158 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:28:22,162 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:28:22,162 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:28:22,164 INFO  L87              Difference]: Start difference. First operand 9884 states and 16566 transitions. Second operand  has 5 states, 5 states have (on average 1277.4) internal successors, (6387), 4 states have internal predecessors, (6387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:28:23,066 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:28:23,066 INFO  L93              Difference]: Finished difference Result 19270 states and 32298 transitions.
[2023-11-29 06:28:23,066 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:28:23,068 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1277.4) internal successors, (6387), 4 states have internal predecessors, (6387), 0 states have call successors, (0), 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 6387
[2023-11-29 06:28:23,068 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:28:23,075 INFO  L225             Difference]: With dead ends: 19270
[2023-11-29 06:28:23,075 INFO  L226             Difference]: Without dead ends: 10059
[2023-11-29 06:28:23,081 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6387 GetRequests, 6383 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:28:23,081 INFO  L413           NwaCegarLoop]: 16519 mSDtfsCounter, 46821 mSDsluCounter, 2650 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46821 SdHoareTripleChecker+Valid, 19169 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:28:23,082 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46821 Valid, 19169 Invalid, 337 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:28:23,096 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10059 states.
[2023-11-29 06:28:23,191 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10059 to 9884.
[2023-11-29 06:28:23,202 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6761104927653547) internal successors, (16565), 9883 states have internal predecessors, (16565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:28:23,218 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16565 transitions.
[2023-11-29 06:28:23,218 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16565 transitions. Word has length 6387
[2023-11-29 06:28:23,220 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:28:23,220 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16565 transitions.
[2023-11-29 06:28:23,222 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1277.4) internal successors, (6387), 4 states have internal predecessors, (6387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:28:23,222 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16565 transitions.
[2023-11-29 06:28:23,457 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6389
[2023-11-29 06:28:23,457 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:28:23,461 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:28:23,649 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-29 06:28:23,661 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-29 06:28:23,661 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:28:23,662 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:28:23,664 INFO  L85        PathProgramCache]: Analyzing trace with hash -183825293, now seen corresponding path program 1 times
[2023-11-29 06:28:23,664 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:28:23,664 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590662895]
[2023-11-29 06:28:23,665 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:28:23,665 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:28:24,664 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:28:24,664 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119459384]
[2023-11-29 06:28:24,665 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:28:24,666 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:28:24,666 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:28:24,666 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:28:24,669 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 06:28:45,611 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:28:46,045 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63790 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:28:46,180 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:28:46,859 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:28:46,859 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:28:46,859 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:28:46,859 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590662895]
[2023-11-29 06:28:46,859 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:28:46,859 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119459384]
[2023-11-29 06:28:46,860 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [119459384] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:28:46,860 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:28:46,862 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:28:46,862 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71367042]
[2023-11-29 06:28:46,862 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:28:46,868 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:28:46,868 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:28:46,875 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:28:46,875 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:28:46,877 INFO  L87              Difference]: Start difference. First operand 9884 states and 16565 transitions. Second operand  has 5 states, 5 states have (on average 1277.6) internal successors, (6388), 4 states have internal predecessors, (6388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:28:47,841 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:28:47,841 INFO  L93              Difference]: Finished difference Result 19274 states and 32302 transitions.
[2023-11-29 06:28:47,842 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:28:47,843 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1277.6) internal successors, (6388), 4 states have internal predecessors, (6388), 0 states have call successors, (0), 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 6388
[2023-11-29 06:28:47,844 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:28:47,849 INFO  L225             Difference]: With dead ends: 19274
[2023-11-29 06:28:47,849 INFO  L226             Difference]: Without dead ends: 10063
[2023-11-29 06:28:47,852 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6388 GetRequests, 6384 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:28:47,853 INFO  L413           NwaCegarLoop]: 16523 mSDtfsCounter, 31627 mSDsluCounter, 2655 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31627 SdHoareTripleChecker+Valid, 19178 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-29 06:28:47,853 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31627 Valid, 19178 Invalid, 339 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-29 06:28:47,863 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10063 states.
[2023-11-29 06:28:47,924 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10063 to 9884.
[2023-11-29 06:28:47,932 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6760093089142973) internal successors, (16564), 9883 states have internal predecessors, (16564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:28:47,946 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16564 transitions.
[2023-11-29 06:28:47,947 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16564 transitions. Word has length 6388
[2023-11-29 06:28:47,948 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:28:47,948 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16564 transitions.
[2023-11-29 06:28:47,949 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1277.6) internal successors, (6388), 4 states have internal predecessors, (6388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:28:47,949 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16564 transitions.
[2023-11-29 06:28:48,114 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6390
[2023-11-29 06:28:48,115 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:28:48,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:28:48,302 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-29 06:28:48,318 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-11-29 06:28:48,319 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:28:48,319 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:28:48,321 INFO  L85        PathProgramCache]: Analyzing trace with hash 216095476, now seen corresponding path program 1 times
[2023-11-29 06:28:48,322 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:28:48,322 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211499200]
[2023-11-29 06:28:48,323 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:28:48,323 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:28:49,492 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:28:49,492 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321585112]
[2023-11-29 06:28:49,493 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:28:49,493 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:28:49,494 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:28:49,494 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:28:49,497 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 06:29:11,882 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:29:12,332 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63791 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:29:12,489 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:29:13,383 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:29:13,384 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:29:13,384 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:29:13,384 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211499200]
[2023-11-29 06:29:13,384 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:29:13,384 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321585112]
[2023-11-29 06:29:13,384 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [321585112] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:29:13,384 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:29:13,386 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:29:13,387 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640097252]
[2023-11-29 06:29:13,387 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:29:13,391 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:29:13,392 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:29:13,396 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:29:13,396 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:29:13,398 INFO  L87              Difference]: Start difference. First operand 9884 states and 16564 transitions. Second operand  has 5 states, 5 states have (on average 1277.8) internal successors, (6389), 4 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:29:14,319 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:29:14,319 INFO  L93              Difference]: Finished difference Result 19314 states and 32366 transitions.
[2023-11-29 06:29:14,320 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:29:14,321 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1277.8) internal successors, (6389), 4 states have internal predecessors, (6389), 0 states have call successors, (0), 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 6389
[2023-11-29 06:29:14,322 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:29:14,330 INFO  L225             Difference]: With dead ends: 19314
[2023-11-29 06:29:14,330 INFO  L226             Difference]: Without dead ends: 10103
[2023-11-29 06:29:14,337 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6389 GetRequests, 6385 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:29:14,338 INFO  L413           NwaCegarLoop]: 16587 mSDtfsCounter, 31625 mSDsluCounter, 2720 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31625 SdHoareTripleChecker+Valid, 19307 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:29:14,338 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31625 Valid, 19307 Invalid, 341 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:29:14,352 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10103 states.
[2023-11-29 06:29:14,444 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10103 to 9884.
[2023-11-29 06:29:14,454 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.67590812506324) internal successors, (16563), 9883 states have internal predecessors, (16563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:29:14,467 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16563 transitions.
[2023-11-29 06:29:14,467 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16563 transitions. Word has length 6389
[2023-11-29 06:29:14,469 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:29:14,469 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16563 transitions.
[2023-11-29 06:29:14,471 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1277.8) internal successors, (6389), 4 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:29:14,471 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16563 transitions.
[2023-11-29 06:29:14,643 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6391
[2023-11-29 06:29:14,643 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:29:14,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:29:14,848 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forcibly destroying the process
[2023-11-29 06:29:14,860 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-29 06:29:14,860 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-29 06:29:14,860 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:29:14,861 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:29:14,865 INFO  L85        PathProgramCache]: Analyzing trace with hash -728888064, now seen corresponding path program 1 times
[2023-11-29 06:29:14,865 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:29:14,865 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947658473]
[2023-11-29 06:29:14,867 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:29:14,867 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:29:15,874 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:29:15,874 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594075559]
[2023-11-29 06:29:15,875 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:29:15,875 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:29:15,875 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:29:15,876 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:29:15,879 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 06:29:36,997 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:29:37,431 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63792 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:29:37,561 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:29:38,334 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:29:38,334 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:29:38,334 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:29:38,334 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947658473]
[2023-11-29 06:29:38,334 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:29:38,334 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594075559]
[2023-11-29 06:29:38,334 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [594075559] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:29:38,335 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:29:38,336 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:29:38,336 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671418150]
[2023-11-29 06:29:38,336 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:29:38,341 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:29:38,341 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:29:38,345 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:29:38,345 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:29:38,347 INFO  L87              Difference]: Start difference. First operand 9884 states and 16563 transitions. Second operand  has 5 states, 5 states have (on average 1278.0) internal successors, (6390), 4 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:29:39,228 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:29:39,229 INFO  L93              Difference]: Finished difference Result 19318 states and 32370 transitions.
[2023-11-29 06:29:39,229 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:29:39,231 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1278.0) internal successors, (6390), 4 states have internal predecessors, (6390), 0 states have call successors, (0), 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 6390
[2023-11-29 06:29:39,231 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:29:39,238 INFO  L225             Difference]: With dead ends: 19318
[2023-11-29 06:29:39,238 INFO  L226             Difference]: Without dead ends: 10107
[2023-11-29 06:29:39,244 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6390 GetRequests, 6386 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:29:39,244 INFO  L413           NwaCegarLoop]: 16591 mSDtfsCounter, 31623 mSDsluCounter, 2725 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31623 SdHoareTripleChecker+Valid, 19316 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:29:39,244 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31623 Valid, 19316 Invalid, 343 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:29:39,256 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10107 states.
[2023-11-29 06:29:39,324 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10107 to 9884.
[2023-11-29 06:29:39,332 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6758069412121825) internal successors, (16562), 9883 states have internal predecessors, (16562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:29:39,343 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16562 transitions.
[2023-11-29 06:29:39,343 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16562 transitions. Word has length 6390
[2023-11-29 06:29:39,345 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:29:39,345 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16562 transitions.
[2023-11-29 06:29:39,347 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1278.0) internal successors, (6390), 4 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:29:39,347 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16562 transitions.
[2023-11-29 06:29:39,579 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6392
[2023-11-29 06:29:39,579 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:29:39,582 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:29:39,764 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-29 06:29:39,782 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-29 06:29:39,782 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:29:39,783 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:29:39,785 INFO  L85        PathProgramCache]: Analyzing trace with hash 617783273, now seen corresponding path program 1 times
[2023-11-29 06:29:39,785 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:29:39,785 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367854146]
[2023-11-29 06:29:39,786 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:29:39,786 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:29:40,694 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:29:40,694 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610151273]
[2023-11-29 06:29:40,695 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:29:40,695 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:29:40,696 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:29:40,696 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:29:40,697 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 06:30:01,954 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:30:02,409 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63793 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:30:02,550 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:30:03,548 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:30:03,548 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:30:03,548 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:30:03,548 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367854146]
[2023-11-29 06:30:03,548 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:30:03,548 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610151273]
[2023-11-29 06:30:03,548 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610151273] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:30:03,548 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:30:03,551 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:30:03,551 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862982389]
[2023-11-29 06:30:03,551 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:30:03,556 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:30:03,556 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:30:03,560 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:30:03,560 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:30:03,562 INFO  L87              Difference]: Start difference. First operand 9884 states and 16562 transitions. Second operand  has 5 states, 5 states have (on average 1278.2) internal successors, (6391), 4 states have internal predecessors, (6391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:30:04,516 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:30:04,517 INFO  L93              Difference]: Finished difference Result 19358 states and 32434 transitions.
[2023-11-29 06:30:04,517 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:30:04,518 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1278.2) internal successors, (6391), 4 states have internal predecessors, (6391), 0 states have call successors, (0), 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 6391
[2023-11-29 06:30:04,519 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:30:04,526 INFO  L225             Difference]: With dead ends: 19358
[2023-11-29 06:30:04,527 INFO  L226             Difference]: Without dead ends: 10147
[2023-11-29 06:30:04,532 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6391 GetRequests, 6387 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:30:04,533 INFO  L413           NwaCegarLoop]: 16655 mSDtfsCounter, 46749 mSDsluCounter, 2790 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46749 SdHoareTripleChecker+Valid, 19445 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:30:04,533 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46749 Valid, 19445 Invalid, 345 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:30:04,545 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10147 states.
[2023-11-29 06:30:04,616 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10147 to 9884.
[2023-11-29 06:30:04,625 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6757057573611251) internal successors, (16561), 9883 states have internal predecessors, (16561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:30:04,637 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16561 transitions.
[2023-11-29 06:30:04,637 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16561 transitions. Word has length 6391
[2023-11-29 06:30:04,638 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:30:04,638 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16561 transitions.
[2023-11-29 06:30:04,640 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1278.2) internal successors, (6391), 4 states have internal predecessors, (6391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:30:04,640 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16561 transitions.
[2023-11-29 06:30:04,888 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6393
[2023-11-29 06:30:04,888 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:30:04,890 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:30:05,079 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-29 06:30:05,090 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:30:05,091 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:30:05,091 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:30:05,093 INFO  L85        PathProgramCache]: Analyzing trace with hash -1461940211, now seen corresponding path program 1 times
[2023-11-29 06:30:05,093 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:30:05,093 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992828180]
[2023-11-29 06:30:05,094 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:30:05,094 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:30:06,052 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:30:06,053 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783419941]
[2023-11-29 06:30:06,054 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:30:06,054 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:30:06,054 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:30:06,055 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:30:06,056 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 06:30:27,442 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:30:27,901 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63794 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:30:28,030 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:30:28,883 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:30:28,883 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:30:28,884 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:30:28,884 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992828180]
[2023-11-29 06:30:28,884 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:30:28,884 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783419941]
[2023-11-29 06:30:28,884 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783419941] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:30:28,884 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:30:28,886 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:30:28,886 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424246831]
[2023-11-29 06:30:28,886 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:30:28,891 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:30:28,891 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:30:28,898 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:30:28,898 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:30:28,900 INFO  L87              Difference]: Start difference. First operand 9884 states and 16561 transitions. Second operand  has 5 states, 5 states have (on average 1278.4) internal successors, (6392), 4 states have internal predecessors, (6392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:30:29,772 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:30:29,772 INFO  L93              Difference]: Finished difference Result 19362 states and 32438 transitions.
[2023-11-29 06:30:29,773 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:30:29,774 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1278.4) internal successors, (6392), 4 states have internal predecessors, (6392), 0 states have call successors, (0), 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 6392
[2023-11-29 06:30:29,775 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:30:29,782 INFO  L225             Difference]: With dead ends: 19362
[2023-11-29 06:30:29,782 INFO  L226             Difference]: Without dead ends: 10151
[2023-11-29 06:30:29,787 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6392 GetRequests, 6388 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:30:29,788 INFO  L413           NwaCegarLoop]: 16659 mSDtfsCounter, 46743 mSDsluCounter, 2795 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46743 SdHoareTripleChecker+Valid, 19454 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:30:29,788 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46743 Valid, 19454 Invalid, 347 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:30:29,800 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10151 states.
[2023-11-29 06:30:29,874 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10151 to 9884.
[2023-11-29 06:30:29,882 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6756045735100678) internal successors, (16560), 9883 states have internal predecessors, (16560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:30:29,895 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16560 transitions.
[2023-11-29 06:30:29,895 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16560 transitions. Word has length 6392
[2023-11-29 06:30:29,896 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:30:29,896 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16560 transitions.
[2023-11-29 06:30:29,898 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1278.4) internal successors, (6392), 4 states have internal predecessors, (6392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:30:29,898 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16560 transitions.
[2023-11-29 06:30:30,112 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6394
[2023-11-29 06:30:30,112 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:30:30,113 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:30:30,306 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-29 06:30:30,313 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-29 06:30:30,314 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:30:30,314 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:30:30,315 INFO  L85        PathProgramCache]: Analyzing trace with hash -2038695586, now seen corresponding path program 1 times
[2023-11-29 06:30:30,315 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:30:30,315 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172020984]
[2023-11-29 06:30:30,316 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:30:30,316 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:30:31,270 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:30:31,270 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512493336]
[2023-11-29 06:30:31,272 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:30:31,272 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:30:31,272 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:30:31,273 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:30:31,274 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 06:30:53,931 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:30:54,426 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63795 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:30:54,662 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:30:55,606 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:30:55,606 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:30:55,607 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:30:55,607 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172020984]
[2023-11-29 06:30:55,607 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:30:55,607 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512493336]
[2023-11-29 06:30:55,607 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512493336] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:30:55,607 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:30:55,609 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:30:55,610 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389008380]
[2023-11-29 06:30:55,610 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:30:55,614 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:30:55,614 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:30:55,619 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:30:55,619 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:30:55,620 INFO  L87              Difference]: Start difference. First operand 9884 states and 16560 transitions. Second operand  has 5 states, 5 states have (on average 1278.6) internal successors, (6393), 4 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:30:56,625 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:30:56,625 INFO  L93              Difference]: Finished difference Result 19402 states and 32502 transitions.
[2023-11-29 06:30:56,626 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:30:56,627 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1278.6) internal successors, (6393), 4 states have internal predecessors, (6393), 0 states have call successors, (0), 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 6393
[2023-11-29 06:30:56,628 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:30:56,636 INFO  L225             Difference]: With dead ends: 19402
[2023-11-29 06:30:56,636 INFO  L226             Difference]: Without dead ends: 10191
[2023-11-29 06:30:56,641 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6393 GetRequests, 6389 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:30:56,642 INFO  L413           NwaCegarLoop]: 16723 mSDtfsCounter, 46713 mSDsluCounter, 2860 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46713 SdHoareTripleChecker+Valid, 19583 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-29 06:30:56,642 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46713 Valid, 19583 Invalid, 349 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-29 06:30:56,655 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10191 states.
[2023-11-29 06:30:56,730 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10191 to 9884.
[2023-11-29 06:30:56,739 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6755033896590104) internal successors, (16559), 9883 states have internal predecessors, (16559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:30:56,751 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16559 transitions.
[2023-11-29 06:30:56,752 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16559 transitions. Word has length 6393
[2023-11-29 06:30:56,752 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:30:56,752 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16559 transitions.
[2023-11-29 06:30:56,754 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1278.6) internal successors, (6393), 4 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:30:56,754 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16559 transitions.
[2023-11-29 06:30:56,987 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6395
[2023-11-29 06:30:56,987 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:30:56,988 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:30:57,189 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forcibly destroying the process
[2023-11-29 06:30:57,189 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2023-11-29 06:30:57,189 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-29 06:30:57,190 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:30:57,190 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:30:57,191 INFO  L85        PathProgramCache]: Analyzing trace with hash 877139354, now seen corresponding path program 1 times
[2023-11-29 06:30:57,191 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:30:57,192 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890590863]
[2023-11-29 06:30:57,192 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:30:57,193 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:30:58,194 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:30:58,194 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173306533]
[2023-11-29 06:30:58,197 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:30:58,197 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:30:58,197 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:30:58,198 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:30:58,199 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 06:31:21,313 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:31:21,769 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63796 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:31:21,890 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:31:22,787 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:31:22,787 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:31:22,788 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:31:22,788 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890590863]
[2023-11-29 06:31:22,788 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:31:22,788 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173306533]
[2023-11-29 06:31:22,788 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173306533] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:31:22,788 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:31:22,790 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:31:22,790 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824684289]
[2023-11-29 06:31:22,791 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:31:22,794 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:31:22,794 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:31:22,798 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:31:22,798 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:31:22,799 INFO  L87              Difference]: Start difference. First operand 9884 states and 16559 transitions. Second operand  has 5 states, 5 states have (on average 1278.8) internal successors, (6394), 4 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:31:23,760 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:31:23,760 INFO  L93              Difference]: Finished difference Result 19406 states and 32506 transitions.
[2023-11-29 06:31:23,761 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:31:23,762 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1278.8) internal successors, (6394), 4 states have internal predecessors, (6394), 0 states have call successors, (0), 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 6394
[2023-11-29 06:31:23,763 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:31:23,770 INFO  L225             Difference]: With dead ends: 19406
[2023-11-29 06:31:23,770 INFO  L226             Difference]: Without dead ends: 10195
[2023-11-29 06:31:23,774 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6394 GetRequests, 6390 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:31:23,775 INFO  L413           NwaCegarLoop]: 16727 mSDtfsCounter, 46707 mSDsluCounter, 2865 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46707 SdHoareTripleChecker+Valid, 19592 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:31:23,775 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46707 Valid, 19592 Invalid, 351 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:31:23,785 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10195 states.
[2023-11-29 06:31:23,844 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10195 to 9884.
[2023-11-29 06:31:23,852 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.675402205807953) internal successors, (16558), 9883 states have internal predecessors, (16558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:31:23,862 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16558 transitions.
[2023-11-29 06:31:23,863 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16558 transitions. Word has length 6394
[2023-11-29 06:31:23,863 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:31:23,863 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16558 transitions.
[2023-11-29 06:31:23,865 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1278.8) internal successors, (6394), 4 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:31:23,865 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16558 transitions.
[2023-11-29 06:31:24,103 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6396
[2023-11-29 06:31:24,103 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:31:24,104 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:31:24,286 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-29 06:31:24,304 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-29 06:31:24,305 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:31:24,305 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:31:24,308 INFO  L85        PathProgramCache]: Analyzing trace with hash -1180932269, now seen corresponding path program 1 times
[2023-11-29 06:31:24,308 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:31:24,308 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577380029]
[2023-11-29 06:31:24,309 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:31:24,309 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:31:25,268 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:31:25,268 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596438865]
[2023-11-29 06:31:25,269 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:31:25,269 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:31:25,269 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:31:25,270 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:31:25,271 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 06:31:48,850 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:31:49,326 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63797 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:31:49,460 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:31:50,492 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:31:50,493 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:31:50,493 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:31:50,493 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577380029]
[2023-11-29 06:31:50,493 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:31:50,493 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596438865]
[2023-11-29 06:31:50,493 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [596438865] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:31:50,493 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:31:50,495 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:31:50,495 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717625176]
[2023-11-29 06:31:50,495 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:31:50,498 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:31:50,499 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:31:50,503 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:31:50,503 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:31:50,504 INFO  L87              Difference]: Start difference. First operand 9884 states and 16558 transitions. Second operand  has 5 states, 5 states have (on average 1279.0) internal successors, (6395), 4 states have internal predecessors, (6395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:31:51,703 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:31:51,703 INFO  L93              Difference]: Finished difference Result 19446 states and 32570 transitions.
[2023-11-29 06:31:51,704 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:31:51,705 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1279.0) internal successors, (6395), 4 states have internal predecessors, (6395), 0 states have call successors, (0), 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 6395
[2023-11-29 06:31:51,706 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:31:51,712 INFO  L225             Difference]: With dead ends: 19446
[2023-11-29 06:31:51,713 INFO  L226             Difference]: Without dead ends: 10235
[2023-11-29 06:31:51,716 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6395 GetRequests, 6391 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:31:51,717 INFO  L413           NwaCegarLoop]: 16791 mSDtfsCounter, 46677 mSDsluCounter, 2930 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46677 SdHoareTripleChecker+Valid, 19721 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2023-11-29 06:31:51,718 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46677 Valid, 19721 Invalid, 353 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2023-11-29 06:31:51,730 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10235 states.
[2023-11-29 06:31:51,806 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 9884.
[2023-11-29 06:31:51,815 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6753010219568958) internal successors, (16557), 9883 states have internal predecessors, (16557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:31:51,828 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16557 transitions.
[2023-11-29 06:31:51,828 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16557 transitions. Word has length 6395
[2023-11-29 06:31:51,829 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:31:51,829 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16557 transitions.
[2023-11-29 06:31:51,830 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1279.0) internal successors, (6395), 4 states have internal predecessors, (6395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:31:51,830 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16557 transitions.
[2023-11-29 06:31:52,028 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6397
[2023-11-29 06:31:52,029 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:31:52,030 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:31:52,230 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forcibly destroying the process
[2023-11-29 06:31:52,246 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0
[2023-11-29 06:31:52,246 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-29 06:31:52,246 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:31:52,247 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:31:52,249 INFO  L85        PathProgramCache]: Analyzing trace with hash 1110580647, now seen corresponding path program 1 times
[2023-11-29 06:31:52,249 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:31:52,250 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422591980]
[2023-11-29 06:31:52,252 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:31:52,252 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:31:53,473 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:31:53,473 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129337313]
[2023-11-29 06:31:53,475 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:31:53,475 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:31:53,475 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:31:53,476 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:31:53,479 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 06:32:17,343 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:32:17,841 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63798 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:32:17,981 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:32:18,905 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:32:18,905 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:32:18,906 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:32:18,906 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422591980]
[2023-11-29 06:32:18,906 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:32:18,906 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129337313]
[2023-11-29 06:32:18,906 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129337313] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:32:18,906 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:32:18,908 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:32:18,909 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359477765]
[2023-11-29 06:32:18,909 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:32:18,912 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:32:18,913 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:32:18,917 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:32:18,917 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:32:18,919 INFO  L87              Difference]: Start difference. First operand 9884 states and 16557 transitions. Second operand  has 5 states, 5 states have (on average 1279.2) internal successors, (6396), 4 states have internal predecessors, (6396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:32:20,007 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:32:20,007 INFO  L93              Difference]: Finished difference Result 19450 states and 32574 transitions.
[2023-11-29 06:32:20,008 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:32:20,009 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1279.2) internal successors, (6396), 4 states have internal predecessors, (6396), 0 states have call successors, (0), 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 6396
[2023-11-29 06:32:20,010 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:32:20,016 INFO  L225             Difference]: With dead ends: 19450
[2023-11-29 06:32:20,017 INFO  L226             Difference]: Without dead ends: 10239
[2023-11-29 06:32:20,021 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6396 GetRequests, 6392 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:32:20,021 INFO  L413           NwaCegarLoop]: 16795 mSDtfsCounter, 46671 mSDsluCounter, 2935 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46671 SdHoareTripleChecker+Valid, 19730 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-29 06:32:20,021 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46671 Valid, 19730 Invalid, 355 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-29 06:32:20,032 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10239 states.
[2023-11-29 06:32:20,094 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10239 to 9884.
[2023-11-29 06:32:20,102 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6751998381058384) internal successors, (16556), 9883 states have internal predecessors, (16556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:32:20,112 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16556 transitions.
[2023-11-29 06:32:20,113 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16556 transitions. Word has length 6396
[2023-11-29 06:32:20,113 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:32:20,113 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16556 transitions.
[2023-11-29 06:32:20,115 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1279.2) internal successors, (6396), 4 states have internal predecessors, (6396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:32:20,115 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16556 transitions.
[2023-11-29 06:32:20,344 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6398
[2023-11-29 06:32:20,344 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:32:20,345 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:32:20,531 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-29 06:32:20,546 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:32:20,546 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:32:20,547 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:32:20,548 INFO  L85        PathProgramCache]: Analyzing trace with hash 480438728, now seen corresponding path program 1 times
[2023-11-29 06:32:20,548 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:32:20,548 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065085363]
[2023-11-29 06:32:20,549 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:32:20,550 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:32:21,522 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:32:21,522 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764872844]
[2023-11-29 06:32:21,523 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:32:21,523 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:32:21,524 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:32:21,524 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:32:21,526 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-29 06:32:42,386 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:32:42,850 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63799 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:32:42,976 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:32:43,775 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:32:43,775 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:32:43,775 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:32:43,775 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065085363]
[2023-11-29 06:32:43,775 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:32:43,775 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764872844]
[2023-11-29 06:32:43,775 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764872844] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:32:43,776 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:32:43,777 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:32:43,777 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818428449]
[2023-11-29 06:32:43,777 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:32:43,780 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:32:43,780 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:32:43,784 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:32:43,784 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:32:43,785 INFO  L87              Difference]: Start difference. First operand 9884 states and 16556 transitions. Second operand  has 5 states, 5 states have (on average 1279.4) internal successors, (6397), 4 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:32:44,833 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:32:44,833 INFO  L93              Difference]: Finished difference Result 19490 states and 32638 transitions.
[2023-11-29 06:32:44,833 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:32:44,835 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1279.4) internal successors, (6397), 4 states have internal predecessors, (6397), 0 states have call successors, (0), 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 6397
[2023-11-29 06:32:44,835 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:32:44,844 INFO  L225             Difference]: With dead ends: 19490
[2023-11-29 06:32:44,844 INFO  L226             Difference]: Without dead ends: 10279
[2023-11-29 06:32:44,849 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6397 GetRequests, 6393 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:32:44,850 INFO  L413           NwaCegarLoop]: 16859 mSDtfsCounter, 31609 mSDsluCounter, 3000 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31609 SdHoareTripleChecker+Valid, 19859 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:32:44,850 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31609 Valid, 19859 Invalid, 357 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:32:44,863 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10279 states.
[2023-11-29 06:32:44,935 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10279 to 9884.
[2023-11-29 06:32:44,943 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.675098654254781) internal successors, (16555), 9883 states have internal predecessors, (16555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:32:44,955 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16555 transitions.
[2023-11-29 06:32:44,955 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16555 transitions. Word has length 6397
[2023-11-29 06:32:44,956 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:32:44,956 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16555 transitions.
[2023-11-29 06:32:44,958 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1279.4) internal successors, (6397), 4 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:32:44,958 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16555 transitions.
[2023-11-29 06:32:45,130 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6399
[2023-11-29 06:32:45,130 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:32:45,132 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:32:45,332 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forcibly destroying the process
[2023-11-29 06:32:45,338 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0
[2023-11-29 06:32:45,339 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:32:45,339 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:32:45,339 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:32:45,341 INFO  L85        PathProgramCache]: Analyzing trace with hash 722217012, now seen corresponding path program 1 times
[2023-11-29 06:32:45,341 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:32:45,342 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635181094]
[2023-11-29 06:32:45,343 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:32:45,343 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:32:46,363 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:32:46,364 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918793964]
[2023-11-29 06:32:46,365 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:32:46,365 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:32:46,365 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:32:46,366 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:32:46,367 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-29 06:33:08,842 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:33:09,300 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63800 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:33:09,440 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:33:10,204 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:33:10,205 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:33:10,205 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:33:10,205 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635181094]
[2023-11-29 06:33:10,205 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:33:10,205 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918793964]
[2023-11-29 06:33:10,205 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918793964] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:33:10,205 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:33:10,207 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:33:10,207 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063455826]
[2023-11-29 06:33:10,207 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:33:10,212 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:33:10,212 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:33:10,217 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:33:10,217 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:33:10,219 INFO  L87              Difference]: Start difference. First operand 9884 states and 16555 transitions. Second operand  has 5 states, 5 states have (on average 1279.6) internal successors, (6398), 4 states have internal predecessors, (6398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:33:11,116 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:33:11,116 INFO  L93              Difference]: Finished difference Result 19494 states and 32642 transitions.
[2023-11-29 06:33:11,117 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:33:11,118 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1279.6) internal successors, (6398), 4 states have internal predecessors, (6398), 0 states have call successors, (0), 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 6398
[2023-11-29 06:33:11,119 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:33:11,126 INFO  L225             Difference]: With dead ends: 19494
[2023-11-29 06:33:11,126 INFO  L226             Difference]: Without dead ends: 10283
[2023-11-29 06:33:11,130 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6398 GetRequests, 6394 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:33:11,131 INFO  L413           NwaCegarLoop]: 16863 mSDtfsCounter, 46635 mSDsluCounter, 3005 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46635 SdHoareTripleChecker+Valid, 19868 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:33:11,131 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46635 Valid, 19868 Invalid, 359 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:33:11,141 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10283 states.
[2023-11-29 06:33:11,201 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10283 to 9884.
[2023-11-29 06:33:11,208 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6749974704037236) internal successors, (16554), 9883 states have internal predecessors, (16554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:33:11,219 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16554 transitions.
[2023-11-29 06:33:11,219 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16554 transitions. Word has length 6398
[2023-11-29 06:33:11,220 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:33:11,220 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16554 transitions.
[2023-11-29 06:33:11,221 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1279.6) internal successors, (6398), 4 states have internal predecessors, (6398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:33:11,222 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16554 transitions.
[2023-11-29 06:33:11,459 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6400
[2023-11-29 06:33:11,459 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:33:11,461 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:33:11,661 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forcibly destroying the process
[2023-11-29 06:33:11,662 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0
[2023-11-29 06:33:11,663 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:33:11,663 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:33:11,663 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:33:11,666 INFO  L85        PathProgramCache]: Analyzing trace with hash 11436221, now seen corresponding path program 1 times
[2023-11-29 06:33:11,666 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:33:11,666 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818442615]
[2023-11-29 06:33:11,668 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:33:11,668 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:33:12,812 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:33:12,812 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575772319]
[2023-11-29 06:33:12,814 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:33:12,814 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:33:12,814 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:33:12,815 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:33:12,816 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-29 06:33:34,499 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:33:34,947 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63801 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:33:35,064 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:33:35,903 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:33:35,904 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:33:35,904 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:33:35,904 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818442615]
[2023-11-29 06:33:35,904 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:33:35,904 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575772319]
[2023-11-29 06:33:35,904 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575772319] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:33:35,904 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:33:35,906 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:33:35,907 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760941366]
[2023-11-29 06:33:35,907 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:33:35,910 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:33:35,910 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:33:35,914 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:33:35,914 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:33:35,916 INFO  L87              Difference]: Start difference. First operand 9884 states and 16554 transitions. Second operand  has 5 states, 5 states have (on average 1279.8) internal successors, (6399), 4 states have internal predecessors, (6399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:33:36,918 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:33:36,918 INFO  L93              Difference]: Finished difference Result 19534 states and 32706 transitions.
[2023-11-29 06:33:36,919 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:33:36,920 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1279.8) internal successors, (6399), 4 states have internal predecessors, (6399), 0 states have call successors, (0), 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 6399
[2023-11-29 06:33:36,920 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:33:36,926 INFO  L225             Difference]: With dead ends: 19534
[2023-11-29 06:33:36,926 INFO  L226             Difference]: Without dead ends: 10323
[2023-11-29 06:33:36,929 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6399 GetRequests, 6395 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:33:36,929 INFO  L413           NwaCegarLoop]: 16927 mSDtfsCounter, 46605 mSDsluCounter, 3070 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46605 SdHoareTripleChecker+Valid, 19997 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-29 06:33:36,930 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46605 Valid, 19997 Invalid, 361 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-29 06:33:36,939 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10323 states.
[2023-11-29 06:33:37,001 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10323 to 9884.
[2023-11-29 06:33:37,009 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6748962865526662) internal successors, (16553), 9883 states have internal predecessors, (16553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:33:37,021 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16553 transitions.
[2023-11-29 06:33:37,021 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16553 transitions. Word has length 6399
[2023-11-29 06:33:37,021 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:33:37,022 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16553 transitions.
[2023-11-29 06:33:37,023 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1279.8) internal successors, (6399), 4 states have internal predecessors, (6399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:33:37,023 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16553 transitions.
[2023-11-29 06:33:37,186 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6401
[2023-11-29 06:33:37,186 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:33:37,188 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:33:37,374 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-29 06:33:37,388 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:33:37,388 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:33:37,389 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:33:37,389 INFO  L85        PathProgramCache]: Analyzing trace with hash 1482143041, now seen corresponding path program 1 times
[2023-11-29 06:33:37,389 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:33:37,389 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928641721]
[2023-11-29 06:33:37,390 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:33:37,390 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:33:38,367 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:33:38,367 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148597740]
[2023-11-29 06:33:38,368 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:33:38,368 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:33:38,369 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:33:38,369 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:33:38,371 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-29 06:34:00,018 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:34:00,482 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63802 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:34:00,607 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:34:01,707 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:34:01,707 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:34:01,707 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:34:01,707 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928641721]
[2023-11-29 06:34:01,707 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:34:01,707 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148597740]
[2023-11-29 06:34:01,707 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [148597740] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:34:01,707 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:34:01,709 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:34:01,709 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101240554]
[2023-11-29 06:34:01,709 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:34:01,712 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:34:01,712 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:34:01,716 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:34:01,716 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:34:01,717 INFO  L87              Difference]: Start difference. First operand 9884 states and 16553 transitions. Second operand  has 5 states, 5 states have (on average 1280.0) internal successors, (6400), 4 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:34:02,729 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:34:02,729 INFO  L93              Difference]: Finished difference Result 19538 states and 32710 transitions.
[2023-11-29 06:34:02,729 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:34:02,731 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1280.0) internal successors, (6400), 4 states have internal predecessors, (6400), 0 states have call successors, (0), 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 6400
[2023-11-29 06:34:02,732 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:34:02,739 INFO  L225             Difference]: With dead ends: 19538
[2023-11-29 06:34:02,739 INFO  L226             Difference]: Without dead ends: 10327
[2023-11-29 06:34:02,744 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6400 GetRequests, 6396 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:34:02,744 INFO  L413           NwaCegarLoop]: 16931 mSDtfsCounter, 31603 mSDsluCounter, 3075 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31603 SdHoareTripleChecker+Valid, 20006 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-29 06:34:02,744 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31603 Valid, 20006 Invalid, 363 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-29 06:34:02,756 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10327 states.
[2023-11-29 06:34:02,825 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10327 to 9884.
[2023-11-29 06:34:02,834 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6747951027016088) internal successors, (16552), 9883 states have internal predecessors, (16552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:34:02,845 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16552 transitions.
[2023-11-29 06:34:02,846 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16552 transitions. Word has length 6400
[2023-11-29 06:34:02,846 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:34:02,846 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16552 transitions.
[2023-11-29 06:34:02,848 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1280.0) internal successors, (6400), 4 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:34:02,848 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16552 transitions.
[2023-11-29 06:34:03,067 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6402
[2023-11-29 06:34:03,067 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:34:03,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:34:03,269 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forcibly destroying the process
[2023-11-29 06:34:03,271 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0
[2023-11-29 06:34:03,271 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:34:03,271 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:34:03,272 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:34:03,274 INFO  L85        PathProgramCache]: Analyzing trace with hash -980538318, now seen corresponding path program 1 times
[2023-11-29 06:34:03,274 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:34:03,274 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291571104]
[2023-11-29 06:34:03,276 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:34:03,276 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:34:04,259 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:34:04,259 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187194146]
[2023-11-29 06:34:04,261 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:34:04,261 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:34:04,262 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:34:04,262 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:34:04,263 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-29 06:34:27,062 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:34:27,526 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63803 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:34:27,644 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:34:28,682 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:34:28,683 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:34:28,683 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:34:28,683 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291571104]
[2023-11-29 06:34:28,683 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:34:28,683 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187194146]
[2023-11-29 06:34:28,683 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [187194146] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:34:28,683 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:34:28,685 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:34:28,685 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428627175]
[2023-11-29 06:34:28,685 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:34:28,688 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:34:28,688 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:34:28,692 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:34:28,692 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:34:28,694 INFO  L87              Difference]: Start difference. First operand 9884 states and 16552 transitions. Second operand  has 5 states, 5 states have (on average 1280.2) internal successors, (6401), 4 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:34:29,736 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:34:29,737 INFO  L93              Difference]: Finished difference Result 19578 states and 32774 transitions.
[2023-11-29 06:34:29,737 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:34:29,738 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1280.2) internal successors, (6401), 4 states have internal predecessors, (6401), 0 states have call successors, (0), 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 6401
[2023-11-29 06:34:29,739 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:34:29,744 INFO  L225             Difference]: With dead ends: 19578
[2023-11-29 06:34:29,745 INFO  L226             Difference]: Without dead ends: 10367
[2023-11-29 06:34:29,747 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6401 GetRequests, 6397 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:34:29,748 INFO  L413           NwaCegarLoop]: 16995 mSDtfsCounter, 46569 mSDsluCounter, 3140 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46569 SdHoareTripleChecker+Valid, 20135 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-29 06:34:29,748 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46569 Valid, 20135 Invalid, 365 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-29 06:34:29,758 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10367 states.
[2023-11-29 06:34:29,820 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10367 to 9884.
[2023-11-29 06:34:29,829 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6746939188505514) internal successors, (16551), 9883 states have internal predecessors, (16551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:34:29,842 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16551 transitions.
[2023-11-29 06:34:29,842 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16551 transitions. Word has length 6401
[2023-11-29 06:34:29,842 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:34:29,843 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16551 transitions.
[2023-11-29 06:34:29,844 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1280.2) internal successors, (6401), 4 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:34:29,844 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16551 transitions.
[2023-11-29 06:34:30,012 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6403
[2023-11-29 06:34:30,012 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:34:30,013 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:34:30,213 WARN  L435       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forcibly destroying the process
[2023-11-29 06:34:30,215 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0
[2023-11-29 06:34:30,216 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:34:30,216 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:34:30,216 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:34:30,217 INFO  L85        PathProgramCache]: Analyzing trace with hash -928627506, now seen corresponding path program 1 times
[2023-11-29 06:34:30,217 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:34:30,217 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475191937]
[2023-11-29 06:34:30,218 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:34:30,218 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:34:31,237 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:34:31,237 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93011806]
[2023-11-29 06:34:31,239 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:34:31,239 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:34:31,239 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:34:31,239 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:34:31,240 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-29 06:34:53,037 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:34:53,481 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63804 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:34:53,596 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:34:54,747 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:34:54,747 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:34:54,748 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:34:54,748 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475191937]
[2023-11-29 06:34:54,748 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:34:54,748 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93011806]
[2023-11-29 06:34:54,748 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [93011806] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:34:54,748 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:34:54,750 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:34:54,751 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877335021]
[2023-11-29 06:34:54,751 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:34:54,754 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:34:54,754 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:34:54,757 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:34:54,758 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:34:54,759 INFO  L87              Difference]: Start difference. First operand 9884 states and 16551 transitions. Second operand  has 5 states, 5 states have (on average 1280.4) internal successors, (6402), 4 states have internal predecessors, (6402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:34:55,781 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:34:55,781 INFO  L93              Difference]: Finished difference Result 19582 states and 32778 transitions.
[2023-11-29 06:34:55,781 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:34:55,783 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1280.4) internal successors, (6402), 4 states have internal predecessors, (6402), 0 states have call successors, (0), 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 6402
[2023-11-29 06:34:55,784 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:34:55,791 INFO  L225             Difference]: With dead ends: 19582
[2023-11-29 06:34:55,791 INFO  L226             Difference]: Without dead ends: 10371
[2023-11-29 06:34:55,797 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6402 GetRequests, 6398 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:34:55,797 INFO  L413           NwaCegarLoop]: 16999 mSDtfsCounter, 46563 mSDsluCounter, 3145 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46563 SdHoareTripleChecker+Valid, 20144 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-29 06:34:55,797 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46563 Valid, 20144 Invalid, 367 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-29 06:34:55,811 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10371 states.
[2023-11-29 06:34:55,884 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10371 to 9884.
[2023-11-29 06:34:55,893 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.674592734999494) internal successors, (16550), 9883 states have internal predecessors, (16550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:34:55,905 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16550 transitions.
[2023-11-29 06:34:55,905 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16550 transitions. Word has length 6402
[2023-11-29 06:34:55,906 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:34:55,906 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16550 transitions.
[2023-11-29 06:34:55,908 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1280.4) internal successors, (6402), 4 states have internal predecessors, (6402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:34:55,908 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16550 transitions.
[2023-11-29 06:34:56,123 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6404
[2023-11-29 06:34:56,123 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:34:56,125 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:34:56,321 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0
[2023-11-29 06:34:56,325 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:34:56,325 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:34:56,326 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:34:56,327 INFO  L85        PathProgramCache]: Analyzing trace with hash -171906009, now seen corresponding path program 1 times
[2023-11-29 06:34:56,327 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:34:56,327 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663645069]
[2023-11-29 06:34:56,327 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:34:56,327 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:34:57,225 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:34:57,225 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67410571]
[2023-11-29 06:34:57,226 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:34:57,227 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:34:57,227 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:34:57,227 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:34:57,228 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-29 06:35:18,435 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:35:18,860 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63805 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:35:18,970 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:35:19,956 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:35:19,956 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:35:19,956 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:35:19,956 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663645069]
[2023-11-29 06:35:19,956 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:35:19,956 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67410571]
[2023-11-29 06:35:19,956 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [67410571] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:35:19,956 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:35:19,958 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:35:19,958 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186300566]
[2023-11-29 06:35:19,958 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:35:19,961 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:35:19,961 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:35:19,965 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:35:19,965 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:35:19,966 INFO  L87              Difference]: Start difference. First operand 9884 states and 16550 transitions. Second operand  has 5 states, 5 states have (on average 1280.6) internal successors, (6403), 4 states have internal predecessors, (6403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:35:20,868 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:35:20,868 INFO  L93              Difference]: Finished difference Result 19622 states and 32842 transitions.
[2023-11-29 06:35:20,869 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:35:20,870 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1280.6) internal successors, (6403), 4 states have internal predecessors, (6403), 0 states have call successors, (0), 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 6403
[2023-11-29 06:35:20,871 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:35:20,879 INFO  L225             Difference]: With dead ends: 19622
[2023-11-29 06:35:20,879 INFO  L226             Difference]: Without dead ends: 10411
[2023-11-29 06:35:20,884 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6403 GetRequests, 6399 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:35:20,884 INFO  L413           NwaCegarLoop]: 17063 mSDtfsCounter, 46533 mSDsluCounter, 3210 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46533 SdHoareTripleChecker+Valid, 20273 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:35:20,884 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46533 Valid, 20273 Invalid, 369 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:35:20,895 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10411 states.
[2023-11-29 06:35:20,957 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10411 to 9884.
[2023-11-29 06:35:20,965 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6744915511484366) internal successors, (16549), 9883 states have internal predecessors, (16549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:35:20,976 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16549 transitions.
[2023-11-29 06:35:20,977 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16549 transitions. Word has length 6403
[2023-11-29 06:35:20,977 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:35:20,977 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16549 transitions.
[2023-11-29 06:35:20,979 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1280.6) internal successors, (6403), 4 states have internal predecessors, (6403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:35:20,979 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16549 transitions.
[2023-11-29 06:35:21,201 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6405
[2023-11-29 06:35:21,201 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:35:21,202 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:35:21,385 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0
[2023-11-29 06:35:21,402 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25
[2023-11-29 06:35:21,403 INFO  L420      AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:35:21,403 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:35:21,404 INFO  L85        PathProgramCache]: Analyzing trace with hash -1818667301, now seen corresponding path program 1 times
[2023-11-29 06:35:21,404 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:35:21,404 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430627078]
[2023-11-29 06:35:21,404 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:35:21,404 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:35:22,286 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:35:22,286 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948923635]
[2023-11-29 06:35:22,287 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:35:22,287 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:35:22,287 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:35:22,288 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:35:22,289 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-29 06:35:42,357 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:35:42,785 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63806 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:35:43,005 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:35:43,909 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:35:43,909 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:35:43,910 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:35:43,910 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430627078]
[2023-11-29 06:35:43,910 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:35:43,910 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948923635]
[2023-11-29 06:35:43,910 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948923635] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:35:43,910 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:35:43,912 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:35:43,912 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241510039]
[2023-11-29 06:35:43,913 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:35:43,915 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:35:43,915 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:35:43,918 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:35:43,918 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:35:43,919 INFO  L87              Difference]: Start difference. First operand 9884 states and 16549 transitions. Second operand  has 5 states, 5 states have (on average 1280.8) internal successors, (6404), 4 states have internal predecessors, (6404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:35:44,844 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:35:44,844 INFO  L93              Difference]: Finished difference Result 19626 states and 32846 transitions.
[2023-11-29 06:35:44,844 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:35:44,846 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1280.8) internal successors, (6404), 4 states have internal predecessors, (6404), 0 states have call successors, (0), 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 6404
[2023-11-29 06:35:44,847 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:35:44,853 INFO  L225             Difference]: With dead ends: 19626
[2023-11-29 06:35:44,854 INFO  L226             Difference]: Without dead ends: 10415
[2023-11-29 06:35:44,858 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6404 GetRequests, 6400 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:35:44,858 INFO  L413           NwaCegarLoop]: 17067 mSDtfsCounter, 46527 mSDsluCounter, 3215 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46527 SdHoareTripleChecker+Valid, 20282 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:35:44,859 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46527 Valid, 20282 Invalid, 371 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:35:44,869 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10415 states.
[2023-11-29 06:35:44,930 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10415 to 9884.
[2023-11-29 06:35:44,938 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6743903672973794) internal successors, (16548), 9883 states have internal predecessors, (16548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:35:44,950 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16548 transitions.
[2023-11-29 06:35:44,950 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16548 transitions. Word has length 6404
[2023-11-29 06:35:44,951 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:35:44,951 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16548 transitions.
[2023-11-29 06:35:44,952 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1280.8) internal successors, (6404), 4 states have internal predecessors, (6404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:35:44,952 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16548 transitions.
[2023-11-29 06:35:45,184 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6406
[2023-11-29 06:35:45,184 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:35:45,185 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:35:45,366 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0
[2023-11-29 06:35:45,386 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26
[2023-11-29 06:35:45,386 INFO  L420      AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:35:45,386 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:35:45,387 INFO  L85        PathProgramCache]: Analyzing trace with hash 1651884188, now seen corresponding path program 1 times
[2023-11-29 06:35:45,387 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:35:45,387 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156053428]
[2023-11-29 06:35:45,388 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:35:45,388 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:35:46,271 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:35:46,271 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001395592]
[2023-11-29 06:35:46,273 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:35:46,273 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:35:46,273 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:35:46,274 INFO  L229       MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:35:46,274 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process
[2023-11-29 06:36:05,898 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:36:06,315 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63807 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:36:06,422 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:36:07,291 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:36:07,291 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:36:07,292 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:36:07,292 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156053428]
[2023-11-29 06:36:07,292 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:36:07,292 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001395592]
[2023-11-29 06:36:07,292 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001395592] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:36:07,292 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:36:07,294 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:36:07,294 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129595670]
[2023-11-29 06:36:07,294 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:36:07,297 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:36:07,297 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:36:07,299 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:36:07,299 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:36:07,301 INFO  L87              Difference]: Start difference. First operand 9884 states and 16548 transitions. Second operand  has 5 states, 5 states have (on average 1281.0) internal successors, (6405), 4 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:36:08,211 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:36:08,211 INFO  L93              Difference]: Finished difference Result 19666 states and 32910 transitions.
[2023-11-29 06:36:08,212 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:36:08,213 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1281.0) internal successors, (6405), 4 states have internal predecessors, (6405), 0 states have call successors, (0), 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 6405
[2023-11-29 06:36:08,214 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:36:08,221 INFO  L225             Difference]: With dead ends: 19666
[2023-11-29 06:36:08,221 INFO  L226             Difference]: Without dead ends: 10455
[2023-11-29 06:36:08,226 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6405 GetRequests, 6401 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:36:08,226 INFO  L413           NwaCegarLoop]: 17131 mSDtfsCounter, 31593 mSDsluCounter, 3280 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31593 SdHoareTripleChecker+Valid, 20411 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:36:08,227 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31593 Valid, 20411 Invalid, 373 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:36:08,237 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10455 states.
[2023-11-29 06:36:08,299 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10455 to 9884.
[2023-11-29 06:36:08,307 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.674289183446322) internal successors, (16547), 9883 states have internal predecessors, (16547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:36:08,318 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16547 transitions.
[2023-11-29 06:36:08,318 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16547 transitions. Word has length 6405
[2023-11-29 06:36:08,318 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:36:08,319 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16547 transitions.
[2023-11-29 06:36:08,320 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1281.0) internal successors, (6405), 4 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:36:08,320 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16547 transitions.
[2023-11-29 06:36:08,560 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6407
[2023-11-29 06:36:08,561 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:36:08,562 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 06:36:08,741 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0
[2023-11-29 06:36:08,762 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27
[2023-11-29 06:36:08,762 INFO  L420      AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:36:08,763 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:36:08,763 INFO  L85        PathProgramCache]: Analyzing trace with hash 1843555176, now seen corresponding path program 1 times
[2023-11-29 06:36:08,764 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:36:08,764 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920562485]
[2023-11-29 06:36:08,764 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:36:08,764 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:36:09,644 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:36:09,644 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493609148]
[2023-11-29 06:36:09,645 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:36:09,646 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:36:09,646 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:36:09,646 INFO  L229       MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:36:09,647 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process
[2023-11-29 06:36:29,132 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:36:29,558 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63808 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:36:29,664 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:36:30,609 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:36:30,609 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:36:30,609 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:36:30,609 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920562485]
[2023-11-29 06:36:30,609 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:36:30,609 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493609148]
[2023-11-29 06:36:30,609 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493609148] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:36:30,609 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:36:30,611 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:36:30,611 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069181053]
[2023-11-29 06:36:30,611 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:36:30,614 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:36:30,614 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:36:30,616 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:36:30,617 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:36:30,618 INFO  L87              Difference]: Start difference. First operand 9884 states and 16547 transitions. Second operand  has 5 states, 5 states have (on average 1281.2) internal successors, (6406), 4 states have internal predecessors, (6406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:36:31,589 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:36:31,589 INFO  L93              Difference]: Finished difference Result 19670 states and 32914 transitions.
[2023-11-29 06:36:31,589 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:36:31,591 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1281.2) internal successors, (6406), 4 states have internal predecessors, (6406), 0 states have call successors, (0), 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 6406
[2023-11-29 06:36:31,592 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:36:31,599 INFO  L225             Difference]: With dead ends: 19670
[2023-11-29 06:36:31,600 INFO  L226             Difference]: Without dead ends: 10459
[2023-11-29 06:36:31,604 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6406 GetRequests, 6402 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:36:31,604 INFO  L413           NwaCegarLoop]: 17135 mSDtfsCounter, 46491 mSDsluCounter, 3285 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46491 SdHoareTripleChecker+Valid, 20420 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:36:31,605 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46491 Valid, 20420 Invalid, 375 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:36:31,617 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10459 states.
[2023-11-29 06:36:31,678 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10459 to 9884.
[2023-11-29 06:36:31,686 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6741879995952647) internal successors, (16546), 9883 states have internal predecessors, (16546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:36:31,784 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16546 transitions.
[2023-11-29 06:36:31,784 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16546 transitions. Word has length 6406
[2023-11-29 06:36:31,785 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:36:31,785 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16546 transitions.
[2023-11-29 06:36:31,786 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1281.2) internal successors, (6406), 4 states have internal predecessors, (6406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:36:31,786 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16546 transitions.
[2023-11-29 06:36:31,950 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6408
[2023-11-29 06:36:31,950 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:36:31,952 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:36:32,133 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0
[2023-11-29 06:36:32,152 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28
[2023-11-29 06:36:32,152 INFO  L420      AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:36:32,153 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:36:32,153 INFO  L85        PathProgramCache]: Analyzing trace with hash 1066117521, now seen corresponding path program 1 times
[2023-11-29 06:36:32,154 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:36:32,154 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537502488]
[2023-11-29 06:36:32,154 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:36:32,154 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:36:33,074 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:36:33,074 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723024936]
[2023-11-29 06:36:33,075 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:36:33,075 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:36:33,075 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:36:33,076 INFO  L229       MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:36:33,077 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process
[2023-11-29 06:36:52,536 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:36:52,992 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63809 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:36:53,097 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:36:54,039 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:36:54,039 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:36:54,040 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:36:54,040 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537502488]
[2023-11-29 06:36:54,040 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:36:54,040 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723024936]
[2023-11-29 06:36:54,040 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [723024936] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:36:54,040 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:36:54,042 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:36:54,042 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024681380]
[2023-11-29 06:36:54,043 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:36:54,045 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:36:54,046 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:36:54,048 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:36:54,048 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:36:54,050 INFO  L87              Difference]: Start difference. First operand 9884 states and 16546 transitions. Second operand  has 5 states, 5 states have (on average 1281.4) internal successors, (6407), 4 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:36:54,935 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:36:54,935 INFO  L93              Difference]: Finished difference Result 19710 states and 32978 transitions.
[2023-11-29 06:36:54,936 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:36:54,937 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1281.4) internal successors, (6407), 4 states have internal predecessors, (6407), 0 states have call successors, (0), 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 6407
[2023-11-29 06:36:54,938 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:36:54,945 INFO  L225             Difference]: With dead ends: 19710
[2023-11-29 06:36:54,945 INFO  L226             Difference]: Without dead ends: 10499
[2023-11-29 06:36:54,949 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6407 GetRequests, 6403 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:36:54,950 INFO  L413           NwaCegarLoop]: 17199 mSDtfsCounter, 31589 mSDsluCounter, 3350 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31589 SdHoareTripleChecker+Valid, 20549 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:36:54,950 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31589 Valid, 20549 Invalid, 377 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:36:54,960 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10499 states.
[2023-11-29 06:36:55,021 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10499 to 9884.
[2023-11-29 06:36:55,028 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9884 states, 9883 states have (on average 1.6740868157442073) internal successors, (16545), 9883 states have internal predecessors, (16545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:36:55,040 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 16545 transitions.
[2023-11-29 06:36:55,040 INFO  L78                 Accepts]: Start accepts. Automaton has 9884 states and 16545 transitions. Word has length 6407
[2023-11-29 06:36:55,040 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 06:36:55,041 INFO  L495      AbstractCegarLoop]: Abstraction has 9884 states and 16545 transitions.
[2023-11-29 06:36:55,042 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1281.4) internal successors, (6407), 4 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:36:55,042 INFO  L276                IsEmpty]: Start isEmpty. Operand 9884 states and 16545 transitions.
[2023-11-29 06:36:55,276 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6409
[2023-11-29 06:36:55,276 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 06:36:55,277 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 06:36:55,455 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0
[2023-11-29 06:36:55,477 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:36:55,478 INFO  L420      AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 06:36:55,478 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 06:36:55,479 INFO  L85        PathProgramCache]: Analyzing trace with hash 759366261, now seen corresponding path program 1 times
[2023-11-29 06:36:55,479 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 06:36:55,479 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468253491]
[2023-11-29 06:36:55,480 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:36:55,480 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 06:36:56,496 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 06:36:56,496 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261795228]
[2023-11-29 06:36:56,497 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 06:36:56,497 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 06:36:56,497 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 06:36:56,498 INFO  L229       MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 06:36:56,499 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7bac9b-a233-4315-ac2e-c7888c2b51e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process
[2023-11-29 06:37:16,608 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 06:37:17,029 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63810 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 06:37:17,140 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 06:37:18,096 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 06:37:18,096 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 06:37:18,096 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 06:37:18,096 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468253491]
[2023-11-29 06:37:18,096 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 06:37:18,096 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261795228]
[2023-11-29 06:37:18,096 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261795228] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 06:37:18,096 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 06:37:18,098 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 06:37:18,098 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323085651]
[2023-11-29 06:37:18,098 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 06:37:18,101 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 06:37:18,101 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 06:37:18,103 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 06:37:18,104 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-29 06:37:18,105 INFO  L87              Difference]: Start difference. First operand 9884 states and 16545 transitions. Second operand  has 5 states, 5 states have (on average 1281.6) internal successors, (6408), 4 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 06:37:19,019 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 06:37:19,019 INFO  L93              Difference]: Finished difference Result 19714 states and 32982 transitions.
[2023-11-29 06:37:19,019 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 06:37:19,021 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1281.6) internal successors, (6408), 4 states have internal predecessors, (6408), 0 states have call successors, (0), 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 6408
[2023-11-29 06:37:19,021 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 06:37:19,028 INFO  L225             Difference]: With dead ends: 19714
[2023-11-29 06:37:19,028 INFO  L226             Difference]: Without dead ends: 10503
[2023-11-29 06:37:19,033 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6408 GetRequests, 6404 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2023-11-29 06:37:19,033 INFO  L413           NwaCegarLoop]: 17203 mSDtfsCounter, 31587 mSDsluCounter, 3355 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31587 SdHoareTripleChecker+Valid, 20558 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-29 06:37:19,034 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31587 Valid, 20558 Invalid, 379 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-29 06:37:19,044 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10503 states.