./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lifts.3.prop1-back-serstep.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_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/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_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lifts.3.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/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_361d48bd-35d8-4ba3-8eba-7a3bed21b056/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 0858174ee900ebcc1c5b762faf23ba112bbd4526fdfc95649aecd350946d53e5
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-29 04:26:29,627 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-29 04:26:29,693 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-29 04:26:29,697 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-29 04:26:29,698 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-29 04:26:29,722 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-29 04:26:29,722 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-29 04:26:29,723 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-29 04:26:29,724 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-29 04:26:29,724 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-29 04:26:29,725 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-29 04:26:29,725 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-29 04:26:29,726 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-29 04:26:29,726 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-29 04:26:29,727 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-29 04:26:29,727 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-29 04:26:29,728 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-29 04:26:29,728 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-29 04:26:29,729 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-29 04:26:29,729 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-29 04:26:29,730 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-29 04:26:29,731 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-29 04:26:29,731 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-29 04:26:29,732 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-29 04:26:29,732 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-29 04:26:29,733 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-29 04:26:29,733 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-29 04:26:29,734 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-29 04:26:29,734 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 04:26:29,735 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-29 04:26:29,735 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-29 04:26:29,735 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-29 04:26:29,736 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-29 04:26:29,736 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-29 04:26:29,736 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-29 04:26:29,736 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-29 04:26:29,736 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-29 04:26:29,737 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-29 04:26:29,737 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-29 04:26:29,737 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_361d48bd-35d8-4ba3-8eba-7a3bed21b056/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_361d48bd-35d8-4ba3-8eba-7a3bed21b056/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 -> 0858174ee900ebcc1c5b762faf23ba112bbd4526fdfc95649aecd350946d53e5
[2023-11-29 04:26:29,954 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-29 04:26:29,976 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-29 04:26:29,979 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-29 04:26:29,980 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-29 04:26:29,980 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-29 04:26:29,981 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lifts.3.prop1-back-serstep.c
[2023-11-29 04:26:32,723 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-29 04:26:33,225 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-29 04:26:33,225 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lifts.3.prop1-back-serstep.c
[2023-11-29 04:26:33,266 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/data/c80cea610/efcc37724d5f4fad9199b7ab7cc4d6b0/FLAGbfd5a9604
[2023-11-29 04:26:33,279 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/data/c80cea610/efcc37724d5f4fad9199b7ab7cc4d6b0
[2023-11-29 04:26:33,281 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-29 04:26:33,283 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-29 04:26:33,284 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-29 04:26:33,284 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-29 04:26:33,290 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-29 04:26:33,290 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:26:33" (1/1) ...
[2023-11-29 04:26:33,291 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee91b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:33, skipping insertion in model container
[2023-11-29 04:26:33,292 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:26:33" (1/1) ...
[2023-11-29 04:26:33,430 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-29 04:26:33,680 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_361d48bd-35d8-4ba3-8eba-7a3bed21b056/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lifts.3.prop1-back-serstep.c[1173,1186]
[2023-11-29 04:26:34,994 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 04:26:35,015 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-29 04:26:35,027 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_361d48bd-35d8-4ba3-8eba-7a3bed21b056/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lifts.3.prop1-back-serstep.c[1173,1186]
[2023-11-29 04:26:36,047 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 04:26:36,063 INFO  L206         MainTranslator]: Completed translation
[2023-11-29 04:26:36,064 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:36 WrapperNode
[2023-11-29 04:26:36,064 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-29 04:26:36,065 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-29 04:26:36,065 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-29 04:26:36,065 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-29 04:26:36,073 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:36" (1/1) ...
[2023-11-29 04:26:36,394 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:36" (1/1) ...
[2023-11-29 04:26:39,561 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54135
[2023-11-29 04:26:39,561 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-29 04:26:39,562 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-29 04:26:39,562 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-29 04:26:39,562 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-29 04:26:39,572 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:36" (1/1) ...
[2023-11-29 04:26:39,572 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:36" (1/1) ...
[2023-11-29 04:26:40,308 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:36" (1/1) ...
[2023-11-29 04:26:40,799 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 04:26:40,799 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:36" (1/1) ...
[2023-11-29 04:26:40,800 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:36" (1/1) ...
[2023-11-29 04:26:41,577 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:36" (1/1) ...
[2023-11-29 04:26:41,769 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:36" (1/1) ...
[2023-11-29 04:26:41,956 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:36" (1/1) ...
[2023-11-29 04:26:42,093 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:36" (1/1) ...
[2023-11-29 04:26:42,834 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-29 04:26:42,835 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-29 04:26:42,835 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-29 04:26:42,835 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-29 04:26:42,836 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:36" (1/1) ...
[2023-11-29 04:26:42,843 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 04:26:42,854 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:26:42,867 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-29 04:26:42,869 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-29 04:26:42,897 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-29 04:26:42,897 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-29 04:26:42,897 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-29 04:26:42,897 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-29 04:26:44,731 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-29 04:26:44,734 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-29 04:27:09,925 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-29 04:27:10,451 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-29 04:27:10,451 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-29 04:27:10,455 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:27:10 BoogieIcfgContainer
[2023-11-29 04:27:10,456 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-29 04:27:10,458 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-29 04:27:10,458 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-29 04:27:10,461 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-29 04:27:10,461 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:26:33" (1/3) ...
[2023-11-29 04:27:10,461 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f057e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:27:10, skipping insertion in model container
[2023-11-29 04:27:10,462 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:26:36" (2/3) ...
[2023-11-29 04:27:10,462 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f057e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:27:10, skipping insertion in model container
[2023-11-29 04:27:10,462 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:27:10" (3/3) ...
[2023-11-29 04:27:10,463 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.lifts.3.prop1-back-serstep.c
[2023-11-29 04:27:10,476 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-29 04:27:10,477 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-29 04:27:10,645 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-29 04:27:10,652 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;@76490711, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-29 04:27:10,652 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-29 04:27:10,686 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12519 states, 12517 states have (on average 1.670128625069905) internal successors, (20905), 12518 states have internal predecessors, (20905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:10,734 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 987
[2023-11-29 04:27:10,734 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:27:10,736 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:10,736 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:27:10,740 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:27:10,741 INFO  L85        PathProgramCache]: Analyzing trace with hash -1249785614, now seen corresponding path program 1 times
[2023-11-29 04:27:10,747 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:27:10,748 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692243016]
[2023-11-29 04:27:10,748 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:27:10,749 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:27:11,729 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:27:16,524 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 04:27:16,525 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:27:16,525 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692243016]
[2023-11-29 04:27:16,526 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692243016] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:27:16,526 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:27:16,527 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:27:16,528 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175246110]
[2023-11-29 04:27:16,529 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:27:16,535 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:27:16,535 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:27:16,560 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:27:16,560 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:27:16,584 INFO  L87              Difference]: Start difference. First operand  has 12519 states, 12517 states have (on average 1.670128625069905) internal successors, (20905), 12518 states have internal predecessors, (20905), 0 states have call successors, (0), 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 246.5) internal successors, (986), 4 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:17,239 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:27:17,239 INFO  L93              Difference]: Finished difference Result 24749 states and 41331 transitions.
[2023-11-29 04:27:17,240 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:27:17,243 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 246.5) internal successors, (986), 4 states have internal predecessors, (986), 0 states have call successors, (0), 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 986
[2023-11-29 04:27:17,249 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:27:17,330 INFO  L225             Difference]: With dead ends: 24749
[2023-11-29 04:27:17,330 INFO  L226             Difference]: Without dead ends: 12519
[2023-11-29 04:27:17,351 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 04:27:17,355 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 1 mSDsluCounter, 41791 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62689 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:27:17,356 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62689 Invalid, 13 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:27:17,400 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12519 states.
[2023-11-29 04:27:17,648 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12519 to 12519.
[2023-11-29 04:27:17,675 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12519 states, 12518 states have (on average 1.6698354369707622) internal successors, (20903), 12518 states have internal predecessors, (20903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:17,727 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12519 states to 12519 states and 20903 transitions.
[2023-11-29 04:27:17,728 INFO  L78                 Accepts]: Start accepts. Automaton has 12519 states and 20903 transitions. Word has length 986
[2023-11-29 04:27:17,731 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:27:17,731 INFO  L495      AbstractCegarLoop]: Abstraction has 12519 states and 20903 transitions.
[2023-11-29 04:27:17,732 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 246.5) internal successors, (986), 4 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:17,733 INFO  L276                IsEmpty]: Start isEmpty. Operand 12519 states and 20903 transitions.
[2023-11-29 04:27:17,772 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 988
[2023-11-29 04:27:17,772 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:27:17,773 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:17,773 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-29 04:27:17,774 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:27:17,774 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:27:17,775 INFO  L85        PathProgramCache]: Analyzing trace with hash -86917530, now seen corresponding path program 1 times
[2023-11-29 04:27:17,775 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:27:17,776 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300826412]
[2023-11-29 04:27:17,776 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:27:17,776 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:27:18,299 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:27:19,757 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 04:27:19,758 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:27:19,758 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300826412]
[2023-11-29 04:27:19,758 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300826412] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:27:19,759 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:27:19,759 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:27:19,759 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667161953]
[2023-11-29 04:27:19,759 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:27:19,762 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:27:19,763 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:27:19,764 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:27:19,765 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:27:19,766 INFO  L87              Difference]: Start difference. First operand 12519 states and 20903 transitions. Second operand  has 4 states, 4 states have (on average 246.75) internal successors, (987), 4 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:20,373 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:27:20,373 INFO  L93              Difference]: Finished difference Result 24752 states and 41329 transitions.
[2023-11-29 04:27:20,374 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:27:20,375 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 246.75) internal successors, (987), 4 states have internal predecessors, (987), 0 states have call successors, (0), 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 987
[2023-11-29 04:27:20,377 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:27:20,441 INFO  L225             Difference]: With dead ends: 24752
[2023-11-29 04:27:20,442 INFO  L226             Difference]: Without dead ends: 12522
[2023-11-29 04:27:20,457 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 04:27:20,459 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 1 mSDsluCounter, 41789 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62687 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:27:20,459 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62687 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:27:20,485 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12522 states.
[2023-11-29 04:27:20,699 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12522 to 12521.
[2023-11-29 04:27:20,720 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12521 states, 12520 states have (on average 1.6697284345047922) internal successors, (20905), 12520 states have internal predecessors, (20905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:20,753 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12521 states to 12521 states and 20905 transitions.
[2023-11-29 04:27:20,753 INFO  L78                 Accepts]: Start accepts. Automaton has 12521 states and 20905 transitions. Word has length 987
[2023-11-29 04:27:20,755 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:27:20,755 INFO  L495      AbstractCegarLoop]: Abstraction has 12521 states and 20905 transitions.
[2023-11-29 04:27:20,756 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 246.75) internal successors, (987), 4 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:20,756 INFO  L276                IsEmpty]: Start isEmpty. Operand 12521 states and 20905 transitions.
[2023-11-29 04:27:20,766 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 989
[2023-11-29 04:27:20,767 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:27:20,768 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:20,768 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-29 04:27:20,768 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:27:20,768 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:27:20,769 INFO  L85        PathProgramCache]: Analyzing trace with hash -1129862642, now seen corresponding path program 1 times
[2023-11-29 04:27:20,769 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:27:20,770 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178222243]
[2023-11-29 04:27:20,770 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:27:20,770 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:27:21,169 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:27:22,467 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 04:27:22,467 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:27:22,468 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178222243]
[2023-11-29 04:27:22,468 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178222243] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:27:22,468 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:27:22,468 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:27:22,469 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044936726]
[2023-11-29 04:27:22,469 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:27:22,470 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:27:22,471 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:27:22,472 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:27:22,472 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:27:22,473 INFO  L87              Difference]: Start difference. First operand 12521 states and 20905 transitions. Second operand  has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:22,974 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:27:22,974 INFO  L93              Difference]: Finished difference Result 36979 states and 61744 transitions.
[2023-11-29 04:27:22,975 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 04:27:22,975 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 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 988
[2023-11-29 04:27:22,977 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:27:23,022 INFO  L225             Difference]: With dead ends: 36979
[2023-11-29 04:27:23,022 INFO  L226             Difference]: Without dead ends: 24747
[2023-11-29 04:27:23,042 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 04:27:23,044 INFO  L413           NwaCegarLoop]: 22863 mSDtfsCounter, 20411 mSDsluCounter, 43752 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20411 SdHoareTripleChecker+Valid, 66615 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:27:23,044 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20411 Valid, 66615 Invalid, 19 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:27:23,077 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24747 states.
[2023-11-29 04:27:23,327 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24747 to 12523.
[2023-11-29 04:27:23,346 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12523 states, 12522 states have (on average 1.6696214662194537) internal successors, (20907), 12522 states have internal predecessors, (20907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:23,367 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12523 states to 12523 states and 20907 transitions.
[2023-11-29 04:27:23,368 INFO  L78                 Accepts]: Start accepts. Automaton has 12523 states and 20907 transitions. Word has length 988
[2023-11-29 04:27:23,370 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:27:23,370 INFO  L495      AbstractCegarLoop]: Abstraction has 12523 states and 20907 transitions.
[2023-11-29 04:27:23,370 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:23,371 INFO  L276                IsEmpty]: Start isEmpty. Operand 12523 states and 20907 transitions.
[2023-11-29 04:27:23,381 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 990
[2023-11-29 04:27:23,382 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:27:23,382 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:23,383 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-29 04:27:23,383 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:27:23,384 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:27:23,384 INFO  L85        PathProgramCache]: Analyzing trace with hash -776704178, now seen corresponding path program 1 times
[2023-11-29 04:27:23,385 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:27:23,385 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552061480]
[2023-11-29 04:27:23,385 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:27:23,385 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:27:23,837 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:27:25,271 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 04:27:25,271 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:27:25,271 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552061480]
[2023-11-29 04:27:25,271 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552061480] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:27:25,271 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:27:25,272 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:27:25,272 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839807713]
[2023-11-29 04:27:25,272 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:27:25,274 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:27:25,274 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:27:25,275 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:27:25,275 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-29 04:27:25,276 INFO  L87              Difference]: Start difference. First operand 12523 states and 20907 transitions. Second operand  has 5 states, 5 states have (on average 197.8) internal successors, (989), 4 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:25,982 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:27:25,982 INFO  L93              Difference]: Finished difference Result 38164 states and 63715 transitions.
[2023-11-29 04:27:25,982 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:27:25,983 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 197.8) internal successors, (989), 4 states have internal predecessors, (989), 0 states have call successors, (0), 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 989
[2023-11-29 04:27:25,984 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:27:26,026 INFO  L225             Difference]: With dead ends: 38164
[2023-11-29 04:27:26,026 INFO  L226             Difference]: Without dead ends: 25930
[2023-11-29 04:27:26,042 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-29 04:27:26,043 INFO  L413           NwaCegarLoop]: 22862 mSDtfsCounter, 83122 mSDsluCounter, 41790 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83122 SdHoareTripleChecker+Valid, 64652 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:27:26,044 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [83122 Valid, 64652 Invalid, 16 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:27:26,076 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25930 states.
[2023-11-29 04:27:26,291 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25930 to 13702.
[2023-11-29 04:27:26,308 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13702 states, 13701 states have (on average 1.669367199474491) internal successors, (22872), 13701 states have internal predecessors, (22872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:26,329 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13702 states to 13702 states and 22872 transitions.
[2023-11-29 04:27:26,329 INFO  L78                 Accepts]: Start accepts. Automaton has 13702 states and 22872 transitions. Word has length 989
[2023-11-29 04:27:26,331 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:27:26,331 INFO  L495      AbstractCegarLoop]: Abstraction has 13702 states and 22872 transitions.
[2023-11-29 04:27:26,332 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 197.8) internal successors, (989), 4 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:26,332 INFO  L276                IsEmpty]: Start isEmpty. Operand 13702 states and 22872 transitions.
[2023-11-29 04:27:26,727 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:27:26,727 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:27:26,732 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:27:26,732 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-29 04:27:26,732 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:27:26,733 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:27:26,736 INFO  L85        PathProgramCache]: Analyzing trace with hash 815499983, now seen corresponding path program 1 times
[2023-11-29 04:27:26,736 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:27:26,736 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609722529]
[2023-11-29 04:27:26,737 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:27:26,737 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:27:27,477 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:27:27,478 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852077050]
[2023-11-29 04:27:27,481 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:27:27,481 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:27:27,481 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:27:27,484 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:27:27,490 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-29 04:27:37,002 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:27:37,255 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39675 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:27:37,466 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:27:37,951 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:27:37,951 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:27:37,951 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:27:37,951 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609722529]
[2023-11-29 04:27:37,952 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:27:37,952 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852077050]
[2023-11-29 04:27:37,952 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [852077050] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:27:37,952 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:27:37,955 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:27:37,955 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528664668]
[2023-11-29 04:27:37,955 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:27:37,963 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:27:37,963 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:27:37,970 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:27:37,970 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:27:37,973 INFO  L87              Difference]: Start difference. First operand 13702 states and 22872 transitions. Second operand  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:38,266 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:27:38,266 INFO  L93              Difference]: Finished difference Result 25946 states and 43314 transitions.
[2023-11-29 04:27:38,267 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:27:38,270 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 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 8924
[2023-11-29 04:27:38,273 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:27:38,308 INFO  L225             Difference]: With dead ends: 25946
[2023-11-29 04:27:38,308 INFO  L226             Difference]: Without dead ends: 13712
[2023-11-29 04:27:38,324 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8923 GetRequests, 8921 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 04:27:38,325 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 12 mSDsluCounter, 41786 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62684 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:27:38,325 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62684 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:27:38,346 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13712 states.
[2023-11-29 04:27:38,520 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13712 to 13704.
[2023-11-29 04:27:38,534 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13704 states, 13703 states have (on average 1.6692695030285338) internal successors, (22874), 13703 states have internal predecessors, (22874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:38,554 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13704 states to 13704 states and 22874 transitions.
[2023-11-29 04:27:38,555 INFO  L78                 Accepts]: Start accepts. Automaton has 13704 states and 22874 transitions. Word has length 8924
[2023-11-29 04:27:38,558 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:27:38,558 INFO  L495      AbstractCegarLoop]: Abstraction has 13704 states and 22874 transitions.
[2023-11-29 04:27:38,561 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:38,561 INFO  L276                IsEmpty]: Start isEmpty. Operand 13704 states and 22874 transitions.
[2023-11-29 04:27:39,020 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:27:39,020 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:27:39,025 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:27:39,121 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-29 04:27:39,225 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:27:39,226 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:27:39,226 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:27:39,229 INFO  L85        PathProgramCache]: Analyzing trace with hash -747649471, now seen corresponding path program 1 times
[2023-11-29 04:27:39,229 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:27:39,229 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483179796]
[2023-11-29 04:27:39,230 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:27:39,230 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:27:39,994 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:27:39,995 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554511448]
[2023-11-29 04:27:39,997 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:27:39,997 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:27:39,997 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:27:39,998 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:27:39,999 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-29 04:27:49,926 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:27:50,184 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39676 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:27:50,297 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:27:50,467 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:27:50,467 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:27:50,467 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:27:50,468 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483179796]
[2023-11-29 04:27:50,468 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:27:50,468 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554511448]
[2023-11-29 04:27:50,468 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554511448] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:27:50,468 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:27:50,471 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:27:50,471 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973231862]
[2023-11-29 04:27:50,472 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:27:50,481 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:27:50,481 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:27:50,487 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:27:50,488 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:27:50,490 INFO  L87              Difference]: Start difference. First operand 13704 states and 22874 transitions. Second operand  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:50,762 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:27:50,762 INFO  L93              Difference]: Finished difference Result 25949 states and 43316 transitions.
[2023-11-29 04:27:50,763 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:27:50,765 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 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 8924
[2023-11-29 04:27:50,766 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:27:50,781 INFO  L225             Difference]: With dead ends: 25949
[2023-11-29 04:27:50,781 INFO  L226             Difference]: Without dead ends: 13713
[2023-11-29 04:27:50,789 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8923 GetRequests, 8921 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 04:27:50,790 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 12 mSDsluCounter, 41786 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62684 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:27:50,791 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62684 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:27:50,806 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13713 states.
[2023-11-29 04:27:51,082 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13713 to 13705.
[2023-11-29 04:27:51,096 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13705 states, 13704 states have (on average 1.6692206654991244) internal successors, (22875), 13704 states have internal predecessors, (22875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:51,110 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13705 states to 13705 states and 22875 transitions.
[2023-11-29 04:27:51,110 INFO  L78                 Accepts]: Start accepts. Automaton has 13705 states and 22875 transitions. Word has length 8924
[2023-11-29 04:27:51,112 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:27:51,112 INFO  L495      AbstractCegarLoop]: Abstraction has 13705 states and 22875 transitions.
[2023-11-29 04:27:51,114 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:27:51,115 INFO  L276                IsEmpty]: Start isEmpty. Operand 13705 states and 22875 transitions.
[2023-11-29 04:27:51,417 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:27:51,417 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:27:51,421 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:27:51,520 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-29 04:27:51,622 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:27:51,622 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:27:51,622 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:27:51,625 INFO  L85        PathProgramCache]: Analyzing trace with hash 806698163, now seen corresponding path program 1 times
[2023-11-29 04:27:51,625 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:27:51,625 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251136357]
[2023-11-29 04:27:51,626 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:27:51,626 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:27:52,305 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:27:52,305 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685900324]
[2023-11-29 04:27:52,307 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:27:52,307 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:27:52,307 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:27:52,308 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:27:52,308 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-29 04:28:01,588 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:28:01,851 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39677 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:28:01,986 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:28:02,180 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:28:02,180 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:28:02,181 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:28:02,181 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251136357]
[2023-11-29 04:28:02,181 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:28:02,181 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685900324]
[2023-11-29 04:28:02,181 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [685900324] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:28:02,181 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:28:02,184 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:28:02,184 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541226194]
[2023-11-29 04:28:02,184 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:28:02,194 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:28:02,194 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:28:02,203 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:28:02,204 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:28:02,206 INFO  L87              Difference]: Start difference. First operand 13705 states and 22875 transitions. Second operand  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:02,458 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:28:02,458 INFO  L93              Difference]: Finished difference Result 25951 states and 43318 transitions.
[2023-11-29 04:28:02,459 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:28:02,461 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 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 8924
[2023-11-29 04:28:02,462 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:28:02,477 INFO  L225             Difference]: With dead ends: 25951
[2023-11-29 04:28:02,477 INFO  L226             Difference]: Without dead ends: 13714
[2023-11-29 04:28:02,484 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8923 GetRequests, 8921 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 04:28:02,485 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 12 mSDsluCounter, 41786 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62684 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:28:02,485 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62684 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:28:02,500 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13714 states.
[2023-11-29 04:28:02,603 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13714 to 13706.
[2023-11-29 04:28:02,614 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13706 states, 13705 states have (on average 1.66917183509668) internal successors, (22876), 13705 states have internal predecessors, (22876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:02,628 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13706 states to 13706 states and 22876 transitions.
[2023-11-29 04:28:02,628 INFO  L78                 Accepts]: Start accepts. Automaton has 13706 states and 22876 transitions. Word has length 8924
[2023-11-29 04:28:02,630 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:28:02,630 INFO  L495      AbstractCegarLoop]: Abstraction has 13706 states and 22876 transitions.
[2023-11-29 04:28:02,632 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:02,632 INFO  L276                IsEmpty]: Start isEmpty. Operand 13706 states and 22876 transitions.
[2023-11-29 04:28:03,018 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:28:03,018 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:28:03,023 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 04:28:03,116 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-29 04:28:03,223 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2023-11-29 04:28:03,223 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:28:03,224 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:28:03,226 INFO  L85        PathProgramCache]: Analyzing trace with hash 1735193381, now seen corresponding path program 1 times
[2023-11-29 04:28:03,227 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:28:03,227 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005256287]
[2023-11-29 04:28:03,227 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:28:03,228 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:28:03,892 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:28:03,892 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942868742]
[2023-11-29 04:28:03,895 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:28:03,895 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:28:03,895 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:28:03,896 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:28:03,897 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-29 04:28:13,802 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:28:14,059 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39678 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:28:14,193 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:28:14,362 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:28:14,362 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:28:14,362 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:28:14,362 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005256287]
[2023-11-29 04:28:14,363 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:28:14,363 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942868742]
[2023-11-29 04:28:14,363 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942868742] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:28:14,363 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:28:14,365 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:28:14,365 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639496940]
[2023-11-29 04:28:14,365 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:28:14,371 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:28:14,372 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:28:14,378 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:28:14,378 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:28:14,380 INFO  L87              Difference]: Start difference. First operand 13706 states and 22876 transitions. Second operand  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:14,645 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:28:14,645 INFO  L93              Difference]: Finished difference Result 25953 states and 43320 transitions.
[2023-11-29 04:28:14,645 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:28:14,647 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 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 8924
[2023-11-29 04:28:14,649 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:28:14,661 INFO  L225             Difference]: With dead ends: 25953
[2023-11-29 04:28:14,661 INFO  L226             Difference]: Without dead ends: 13715
[2023-11-29 04:28:14,668 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8923 GetRequests, 8921 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 04:28:14,669 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 12 mSDsluCounter, 41786 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62684 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:28:14,669 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62684 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:28:14,684 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13715 states.
[2023-11-29 04:28:14,947 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13715 to 13707.
[2023-11-29 04:28:14,960 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13707 states, 13706 states have (on average 1.669123011819641) internal successors, (22877), 13706 states have internal predecessors, (22877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:14,974 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13707 states to 13707 states and 22877 transitions.
[2023-11-29 04:28:14,974 INFO  L78                 Accepts]: Start accepts. Automaton has 13707 states and 22877 transitions. Word has length 8924
[2023-11-29 04:28:14,977 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:28:14,977 INFO  L495      AbstractCegarLoop]: Abstraction has 13707 states and 22877 transitions.
[2023-11-29 04:28:14,978 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:14,978 INFO  L276                IsEmpty]: Start isEmpty. Operand 13707 states and 22877 transitions.
[2023-11-29 04:28:15,273 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:28:15,273 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:28:15,278 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:28:15,378 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-29 04:28:15,494 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:28:15,495 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:28:15,495 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:28:15,497 INFO  L85        PathProgramCache]: Analyzing trace with hash 1049021079, now seen corresponding path program 1 times
[2023-11-29 04:28:15,498 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:28:15,498 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540619754]
[2023-11-29 04:28:15,498 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:28:15,498 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:28:16,164 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:28:16,165 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119337508]
[2023-11-29 04:28:16,167 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:28:16,167 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:28:16,167 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:28:16,168 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:28:16,169 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 04:28:26,085 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:28:26,350 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39679 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:28:26,493 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:28:26,732 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:28:26,732 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:28:26,732 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:28:26,732 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540619754]
[2023-11-29 04:28:26,732 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:28:26,732 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119337508]
[2023-11-29 04:28:26,732 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119337508] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:28:26,732 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:28:26,736 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:28:26,736 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674283180]
[2023-11-29 04:28:26,736 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:28:26,745 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:28:26,745 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:28:26,754 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:28:26,754 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:28:26,757 INFO  L87              Difference]: Start difference. First operand 13707 states and 22877 transitions. Second operand  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:27,114 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:28:27,114 INFO  L93              Difference]: Finished difference Result 25955 states and 43322 transitions.
[2023-11-29 04:28:27,115 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:28:27,117 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 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 8924
[2023-11-29 04:28:27,119 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:28:27,133 INFO  L225             Difference]: With dead ends: 25955
[2023-11-29 04:28:27,133 INFO  L226             Difference]: Without dead ends: 13716
[2023-11-29 04:28:27,142 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8923 GetRequests, 8921 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 04:28:27,142 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 12 mSDsluCounter, 41786 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62684 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:28:27,143 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62684 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:28:27,162 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13716 states.
[2023-11-29 04:28:27,313 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13716 to 13708.
[2023-11-29 04:28:27,326 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13708 states, 13707 states have (on average 1.6690741956664479) internal successors, (22878), 13707 states have internal predecessors, (22878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:27,349 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13708 states to 13708 states and 22878 transitions.
[2023-11-29 04:28:27,350 INFO  L78                 Accepts]: Start accepts. Automaton has 13708 states and 22878 transitions. Word has length 8924
[2023-11-29 04:28:27,353 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:28:27,353 INFO  L495      AbstractCegarLoop]: Abstraction has 13708 states and 22878 transitions.
[2023-11-29 04:28:27,355 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:27,355 INFO  L276                IsEmpty]: Start isEmpty. Operand 13708 states and 22878 transitions.
[2023-11-29 04:28:28,089 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:28:28,089 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:28:28,093 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:28:28,198 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-29 04:28:28,293 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:28:28,294 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:28:28,294 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:28:28,298 INFO  L85        PathProgramCache]: Analyzing trace with hash 1158417929, now seen corresponding path program 1 times
[2023-11-29 04:28:28,298 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:28:28,298 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638571038]
[2023-11-29 04:28:28,300 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:28:28,300 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:28:29,183 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:28:29,183 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343287647]
[2023-11-29 04:28:29,185 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:28:29,185 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:28:29,185 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:28:29,186 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:28:29,188 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 04:28:39,460 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:28:39,718 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39680 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:28:39,831 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:28:40,164 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:28:40,164 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:28:40,165 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:28:40,165 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638571038]
[2023-11-29 04:28:40,165 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:28:40,165 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343287647]
[2023-11-29 04:28:40,165 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [343287647] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:28:40,165 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:28:40,167 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:28:40,168 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043059931]
[2023-11-29 04:28:40,168 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:28:40,174 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:28:40,174 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:28:40,180 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:28:40,180 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:28:40,182 INFO  L87              Difference]: Start difference. First operand 13708 states and 22878 transitions. Second operand  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:40,441 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:28:40,441 INFO  L93              Difference]: Finished difference Result 25957 states and 43324 transitions.
[2023-11-29 04:28:40,441 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:28:40,443 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 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 8924
[2023-11-29 04:28:40,446 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:28:40,456 INFO  L225             Difference]: With dead ends: 25957
[2023-11-29 04:28:40,456 INFO  L226             Difference]: Without dead ends: 13717
[2023-11-29 04:28:40,463 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8923 GetRequests, 8921 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 04:28:40,464 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 12 mSDsluCounter, 41786 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62684 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:28:40,464 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62684 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:28:40,480 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13717 states.
[2023-11-29 04:28:40,586 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13717 to 13709.
[2023-11-29 04:28:40,598 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13709 states, 13708 states have (on average 1.6690253866355413) internal successors, (22879), 13708 states have internal predecessors, (22879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:40,615 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13709 states to 13709 states and 22879 transitions.
[2023-11-29 04:28:40,615 INFO  L78                 Accepts]: Start accepts. Automaton has 13709 states and 22879 transitions. Word has length 8924
[2023-11-29 04:28:40,616 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:28:40,616 INFO  L495      AbstractCegarLoop]: Abstraction has 13709 states and 22879 transitions.
[2023-11-29 04:28:40,618 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:40,619 INFO  L276                IsEmpty]: Start isEmpty. Operand 13709 states and 22879 transitions.
[2023-11-29 04:28:40,918 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:28:40,918 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:28:40,922 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:28:41,025 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-29 04:28:41,122 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-29 04:28:41,123 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:28:41,123 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:28:41,125 INFO  L85        PathProgramCache]: Analyzing trace with hash -888947845, now seen corresponding path program 1 times
[2023-11-29 04:28:41,126 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:28:41,126 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732524390]
[2023-11-29 04:28:41,126 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:28:41,126 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:28:41,844 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:28:41,844 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812439705]
[2023-11-29 04:28:41,845 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:28:41,845 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:28:41,846 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:28:41,846 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:28:41,848 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 04:28:51,336 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:28:51,602 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39681 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:28:51,715 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:28:51,859 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:28:51,859 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:28:51,859 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:28:51,859 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732524390]
[2023-11-29 04:28:51,859 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:28:51,859 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812439705]
[2023-11-29 04:28:51,859 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812439705] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:28:51,859 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:28:51,862 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:28:51,862 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087569958]
[2023-11-29 04:28:51,862 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:28:51,869 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:28:51,869 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:28:51,875 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:28:51,875 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:28:51,877 INFO  L87              Difference]: Start difference. First operand 13709 states and 22879 transitions. Second operand  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:52,264 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:28:52,264 INFO  L93              Difference]: Finished difference Result 25959 states and 43326 transitions.
[2023-11-29 04:28:52,265 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:28:52,267 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 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 8924
[2023-11-29 04:28:52,268 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:28:52,278 INFO  L225             Difference]: With dead ends: 25959
[2023-11-29 04:28:52,279 INFO  L226             Difference]: Without dead ends: 13718
[2023-11-29 04:28:52,285 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8923 GetRequests, 8921 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 04:28:52,286 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 12 mSDsluCounter, 41786 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62684 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:28:52,286 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62684 Invalid, 17 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:28:52,302 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13718 states.
[2023-11-29 04:28:52,409 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13718 to 13710.
[2023-11-29 04:28:52,421 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13710 states, 13709 states have (on average 1.6689765847253628) internal successors, (22880), 13709 states have internal predecessors, (22880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:52,436 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13710 states to 13710 states and 22880 transitions.
[2023-11-29 04:28:52,436 INFO  L78                 Accepts]: Start accepts. Automaton has 13710 states and 22880 transitions. Word has length 8924
[2023-11-29 04:28:52,438 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:28:52,438 INFO  L495      AbstractCegarLoop]: Abstraction has 13710 states and 22880 transitions.
[2023-11-29 04:28:52,439 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:28:52,439 INFO  L276                IsEmpty]: Start isEmpty. Operand 13710 states and 22880 transitions.
[2023-11-29 04:28:52,738 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:28:52,738 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:28:52,740 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 04:28:52,844 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-29 04:28:52,940 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:28:52,941 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:28:52,941 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:28:52,943 INFO  L85        PathProgramCache]: Analyzing trace with hash -1782221075, now seen corresponding path program 1 times
[2023-11-29 04:28:52,943 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:28:52,943 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008265684]
[2023-11-29 04:28:52,944 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:28:52,944 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:28:53,731 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:28:53,731 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945050505]
[2023-11-29 04:28:53,733 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:28:53,733 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:28:53,733 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:28:53,734 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:28:53,734 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 04:29:03,744 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:29:04,029 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39682 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:29:04,131 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:29:04,270 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:29:04,270 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:29:04,270 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:29:04,270 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008265684]
[2023-11-29 04:29:04,270 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:29:04,271 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945050505]
[2023-11-29 04:29:04,271 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [945050505] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:29:04,271 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:29:04,273 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:29:04,273 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379235981]
[2023-11-29 04:29:04,273 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:29:04,278 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:29:04,278 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:29:04,283 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:29:04,283 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:29:04,285 INFO  L87              Difference]: Start difference. First operand 13710 states and 22880 transitions. Second operand  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:04,564 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:29:04,564 INFO  L93              Difference]: Finished difference Result 25961 states and 43328 transitions.
[2023-11-29 04:29:04,565 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:29:04,567 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 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 8924
[2023-11-29 04:29:04,569 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:29:04,579 INFO  L225             Difference]: With dead ends: 25961
[2023-11-29 04:29:04,579 INFO  L226             Difference]: Without dead ends: 13719
[2023-11-29 04:29:04,586 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8923 GetRequests, 8921 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 04:29:04,587 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 12 mSDsluCounter, 41786 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62684 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:29:04,587 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62684 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:29:04,602 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13719 states.
[2023-11-29 04:29:04,844 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13719 to 13711.
[2023-11-29 04:29:04,856 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13711 states, 13710 states have (on average 1.6689277899343544) internal successors, (22881), 13710 states have internal predecessors, (22881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:04,871 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13711 states to 13711 states and 22881 transitions.
[2023-11-29 04:29:04,871 INFO  L78                 Accepts]: Start accepts. Automaton has 13711 states and 22881 transitions. Word has length 8924
[2023-11-29 04:29:04,873 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:29:04,873 INFO  L495      AbstractCegarLoop]: Abstraction has 13711 states and 22881 transitions.
[2023-11-29 04:29:04,874 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:04,874 INFO  L276                IsEmpty]: Start isEmpty. Operand 13711 states and 22881 transitions.
[2023-11-29 04:29:05,168 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:29:05,168 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:29:05,170 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:29:05,273 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-29 04:29:05,370 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:29:05,371 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:29:05,371 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:29:05,373 INFO  L85        PathProgramCache]: Analyzing trace with hash 94976351, now seen corresponding path program 1 times
[2023-11-29 04:29:05,373 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:29:05,373 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039466819]
[2023-11-29 04:29:05,374 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:29:05,374 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:29:06,023 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:29:06,023 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962421654]
[2023-11-29 04:29:06,025 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:29:06,025 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:29:06,025 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:29:06,026 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:29:06,026 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 04:29:15,542 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:29:15,791 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39683 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:29:15,874 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:29:16,004 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:29:16,004 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:29:16,004 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:29:16,004 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039466819]
[2023-11-29 04:29:16,004 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:29:16,004 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962421654]
[2023-11-29 04:29:16,004 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [962421654] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:29:16,004 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:29:16,007 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:29:16,007 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966769774]
[2023-11-29 04:29:16,007 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:29:16,011 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:29:16,011 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:29:16,015 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:29:16,016 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:29:16,017 INFO  L87              Difference]: Start difference. First operand 13711 states and 22881 transitions. Second operand  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:16,276 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:29:16,276 INFO  L93              Difference]: Finished difference Result 25963 states and 43330 transitions.
[2023-11-29 04:29:16,276 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:29:16,278 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 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 8924
[2023-11-29 04:29:16,281 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:29:16,291 INFO  L225             Difference]: With dead ends: 25963
[2023-11-29 04:29:16,291 INFO  L226             Difference]: Without dead ends: 13720
[2023-11-29 04:29:16,298 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8923 GetRequests, 8921 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 04:29:16,298 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 12 mSDsluCounter, 41786 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62684 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:29:16,298 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62684 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:29:16,311 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13720 states.
[2023-11-29 04:29:16,419 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13720 to 13712.
[2023-11-29 04:29:16,431 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13712 states, 13711 states have (on average 1.6688790022609583) internal successors, (22882), 13711 states have internal predecessors, (22882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:16,448 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13712 states to 13712 states and 22882 transitions.
[2023-11-29 04:29:16,448 INFO  L78                 Accepts]: Start accepts. Automaton has 13712 states and 22882 transitions. Word has length 8924
[2023-11-29 04:29:16,450 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:29:16,450 INFO  L495      AbstractCegarLoop]: Abstraction has 13712 states and 22882 transitions.
[2023-11-29 04:29:16,453 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:16,453 INFO  L276                IsEmpty]: Start isEmpty. Operand 13712 states and 22882 transitions.
[2023-11-29 04:29:16,851 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:29:16,851 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:29:16,853 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:29:16,954 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-29 04:29:17,053 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-29 04:29:17,053 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:29:17,054 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:29:17,055 INFO  L85        PathProgramCache]: Analyzing trace with hash -157653039, now seen corresponding path program 1 times
[2023-11-29 04:29:17,055 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:29:17,055 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375166917]
[2023-11-29 04:29:17,056 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:29:17,056 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:29:17,688 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:29:17,688 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707249176]
[2023-11-29 04:29:17,690 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:29:17,690 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:29:17,690 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:29:17,691 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:29:17,693 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 04:29:27,285 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:29:27,560 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39684 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:29:27,657 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:29:27,798 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:29:27,798 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:29:27,798 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:29:27,798 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375166917]
[2023-11-29 04:29:27,799 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:29:27,799 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707249176]
[2023-11-29 04:29:27,799 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707249176] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:29:27,799 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:29:27,802 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:29:27,802 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980677002]
[2023-11-29 04:29:27,802 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:29:27,808 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:29:27,808 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:29:27,813 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:29:27,813 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:29:27,815 INFO  L87              Difference]: Start difference. First operand 13712 states and 22882 transitions. Second operand  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:28,099 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:29:28,099 INFO  L93              Difference]: Finished difference Result 25965 states and 43332 transitions.
[2023-11-29 04:29:28,100 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:29:28,102 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 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 8924
[2023-11-29 04:29:28,105 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:29:28,116 INFO  L225             Difference]: With dead ends: 25965
[2023-11-29 04:29:28,116 INFO  L226             Difference]: Without dead ends: 13721
[2023-11-29 04:29:28,122 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8923 GetRequests, 8921 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 04:29:28,123 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 12 mSDsluCounter, 41786 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62684 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:29:28,123 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62684 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:29:28,140 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13721 states.
[2023-11-29 04:29:28,256 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13721 to 13713.
[2023-11-29 04:29:28,269 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13713 states, 13712 states have (on average 1.6688302217036173) internal successors, (22883), 13712 states have internal predecessors, (22883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:28,285 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13713 states to 13713 states and 22883 transitions.
[2023-11-29 04:29:28,285 INFO  L78                 Accepts]: Start accepts. Automaton has 13713 states and 22883 transitions. Word has length 8924
[2023-11-29 04:29:28,287 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:29:28,287 INFO  L495      AbstractCegarLoop]: Abstraction has 13713 states and 22883 transitions.
[2023-11-29 04:29:28,289 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:28,289 INFO  L276                IsEmpty]: Start isEmpty. Operand 13713 states and 22883 transitions.
[2023-11-29 04:29:28,585 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:29:28,585 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:29:28,587 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:29:28,696 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-29 04:29:28,787 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-29 04:29:28,788 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:29:28,788 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:29:28,790 INFO  L85        PathProgramCache]: Analyzing trace with hash 1759700803, now seen corresponding path program 1 times
[2023-11-29 04:29:28,790 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:29:28,790 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063215771]
[2023-11-29 04:29:28,792 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:29:28,792 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:29:29,541 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:29:29,541 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452413482]
[2023-11-29 04:29:29,543 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:29:29,543 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:29:29,543 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:29:29,544 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:29:29,545 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 04:29:39,494 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:29:39,757 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39685 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:29:39,859 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:29:39,993 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:29:39,993 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:29:39,993 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:29:39,993 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063215771]
[2023-11-29 04:29:39,993 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:29:39,993 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452413482]
[2023-11-29 04:29:39,993 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452413482] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:29:39,993 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:29:39,995 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:29:39,995 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627671146]
[2023-11-29 04:29:39,996 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:29:40,000 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:29:40,000 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:29:40,005 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:29:40,005 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:29:40,007 INFO  L87              Difference]: Start difference. First operand 13713 states and 22883 transitions. Second operand  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:40,286 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:29:40,286 INFO  L93              Difference]: Finished difference Result 25967 states and 43334 transitions.
[2023-11-29 04:29:40,287 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:29:40,289 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 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 8924
[2023-11-29 04:29:40,291 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:29:40,302 INFO  L225             Difference]: With dead ends: 25967
[2023-11-29 04:29:40,302 INFO  L226             Difference]: Without dead ends: 13722
[2023-11-29 04:29:40,309 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8923 GetRequests, 8921 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 04:29:40,310 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 12 mSDsluCounter, 41786 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62684 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:29:40,310 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62684 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:29:40,327 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13722 states.
[2023-11-29 04:29:40,442 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13722 to 13714.
[2023-11-29 04:29:40,454 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13714 states, 13713 states have (on average 1.6687814482607743) internal successors, (22884), 13713 states have internal predecessors, (22884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:40,471 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13714 states to 13714 states and 22884 transitions.
[2023-11-29 04:29:40,471 INFO  L78                 Accepts]: Start accepts. Automaton has 13714 states and 22884 transitions. Word has length 8924
[2023-11-29 04:29:40,473 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:29:40,473 INFO  L495      AbstractCegarLoop]: Abstraction has 13714 states and 22884 transitions.
[2023-11-29 04:29:40,476 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:40,476 INFO  L276                IsEmpty]: Start isEmpty. Operand 13714 states and 22884 transitions.
[2023-11-29 04:29:40,777 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:29:40,777 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:29:40,779 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:29:40,886 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2023-11-29 04:29:40,980 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-29 04:29:40,980 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:29:40,981 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:29:40,983 INFO  L85        PathProgramCache]: Analyzing trace with hash -1197113419, now seen corresponding path program 1 times
[2023-11-29 04:29:40,983 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:29:40,983 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720700177]
[2023-11-29 04:29:40,985 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:29:40,985 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:29:41,677 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:29:41,677 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941087146]
[2023-11-29 04:29:41,679 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:29:41,679 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:29:41,680 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:29:41,680 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:29:41,681 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 04:29:51,828 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:29:52,088 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39686 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:29:52,208 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:29:52,362 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:29:52,362 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:29:52,362 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:29:52,362 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720700177]
[2023-11-29 04:29:52,362 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:29:52,362 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941087146]
[2023-11-29 04:29:52,363 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941087146] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:29:52,363 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:29:52,365 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:29:52,365 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966287126]
[2023-11-29 04:29:52,366 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:29:52,372 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:29:52,372 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:29:52,380 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:29:52,380 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:29:52,383 INFO  L87              Difference]: Start difference. First operand 13714 states and 22884 transitions. Second operand  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:52,659 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:29:52,659 INFO  L93              Difference]: Finished difference Result 25969 states and 43336 transitions.
[2023-11-29 04:29:52,659 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:29:52,662 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 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 8924
[2023-11-29 04:29:52,664 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:29:52,675 INFO  L225             Difference]: With dead ends: 25969
[2023-11-29 04:29:52,675 INFO  L226             Difference]: Without dead ends: 13723
[2023-11-29 04:29:52,683 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8923 GetRequests, 8921 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 04:29:52,683 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 12 mSDsluCounter, 41786 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62684 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:29:52,683 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62684 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:29:52,700 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13723 states.
[2023-11-29 04:29:52,808 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13723 to 13715.
[2023-11-29 04:29:52,821 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13715 states, 13714 states have (on average 1.6687326819308737) internal successors, (22885), 13714 states have internal predecessors, (22885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:52,837 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13715 states to 13715 states and 22885 transitions.
[2023-11-29 04:29:52,837 INFO  L78                 Accepts]: Start accepts. Automaton has 13715 states and 22885 transitions. Word has length 8924
[2023-11-29 04:29:52,839 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:29:52,840 INFO  L495      AbstractCegarLoop]: Abstraction has 13715 states and 22885 transitions.
[2023-11-29 04:29:52,842 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:29:52,842 INFO  L276                IsEmpty]: Start isEmpty. Operand 13715 states and 22885 transitions.
[2023-11-29 04:29:53,324 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:29:53,324 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:29:53,325 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:29:53,421 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-29 04:29:53,526 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-29 04:29:53,526 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:29:53,526 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:29:53,527 INFO  L85        PathProgramCache]: Analyzing trace with hash -1419082969, now seen corresponding path program 1 times
[2023-11-29 04:29:53,527 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:29:53,528 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040548758]
[2023-11-29 04:29:53,528 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:29:53,528 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:29:54,127 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:29:54,128 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338067519]
[2023-11-29 04:29:54,129 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:29:54,129 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:29:54,129 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:29:54,130 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:29:54,131 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 04:30:03,559 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:30:03,836 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39687 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:30:03,929 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:30:04,065 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:30:04,065 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:30:04,065 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:30:04,065 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040548758]
[2023-11-29 04:30:04,065 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:30:04,065 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338067519]
[2023-11-29 04:30:04,065 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [338067519] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:30:04,065 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:30:04,069 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:30:04,069 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099168242]
[2023-11-29 04:30:04,069 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:30:04,073 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:30:04,073 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:30:04,078 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:30:04,078 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:30:04,081 INFO  L87              Difference]: Start difference. First operand 13715 states and 22885 transitions. Second operand  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:30:04,348 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:30:04,348 INFO  L93              Difference]: Finished difference Result 25971 states and 43338 transitions.
[2023-11-29 04:30:04,349 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:30:04,351 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 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 8924
[2023-11-29 04:30:04,354 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:30:04,365 INFO  L225             Difference]: With dead ends: 25971
[2023-11-29 04:30:04,365 INFO  L226             Difference]: Without dead ends: 13724
[2023-11-29 04:30:04,372 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8923 GetRequests, 8921 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 04:30:04,373 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 12 mSDsluCounter, 41786 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62684 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:30:04,373 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62684 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:30:04,389 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13724 states.
[2023-11-29 04:30:04,506 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13724 to 13716.
[2023-11-29 04:30:04,518 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13716 states, 13715 states have (on average 1.6686839227123587) internal successors, (22886), 13715 states have internal predecessors, (22886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:30:04,534 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13716 states to 13716 states and 22886 transitions.
[2023-11-29 04:30:04,535 INFO  L78                 Accepts]: Start accepts. Automaton has 13716 states and 22886 transitions. Word has length 8924
[2023-11-29 04:30:04,537 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:30:04,537 INFO  L495      AbstractCegarLoop]: Abstraction has 13716 states and 22886 transitions.
[2023-11-29 04:30:04,539 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:30:04,539 INFO  L276                IsEmpty]: Start isEmpty. Operand 13716 states and 22886 transitions.
[2023-11-29 04:30:04,835 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:30:04,835 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:30:04,837 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:30:04,940 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0
[2023-11-29 04:30:05,038 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-29 04:30:05,038 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:30:05,038 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:30:05,039 INFO  L85        PathProgramCache]: Analyzing trace with hash 716542873, now seen corresponding path program 1 times
[2023-11-29 04:30:05,040 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:30:05,040 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170543590]
[2023-11-29 04:30:05,042 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:30:05,042 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:30:05,679 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:30:05,680 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008308024]
[2023-11-29 04:30:05,681 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:30:05,681 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:30:05,681 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:30:05,682 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:30:05,683 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 04:30:15,559 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:30:15,818 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39688 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:30:15,912 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:30:16,066 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:30:16,067 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:30:16,067 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:30:16,067 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170543590]
[2023-11-29 04:30:16,067 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:30:16,067 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008308024]
[2023-11-29 04:30:16,067 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008308024] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:30:16,067 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:30:16,069 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:30:16,070 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159780042]
[2023-11-29 04:30:16,070 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:30:16,076 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:30:16,077 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:30:16,084 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:30:16,084 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:30:16,087 INFO  L87              Difference]: Start difference. First operand 13716 states and 22886 transitions. Second operand  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:30:16,366 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:30:16,367 INFO  L93              Difference]: Finished difference Result 25973 states and 43340 transitions.
[2023-11-29 04:30:16,367 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:30:16,369 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 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 8924
[2023-11-29 04:30:16,375 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:30:16,386 INFO  L225             Difference]: With dead ends: 25973
[2023-11-29 04:30:16,386 INFO  L226             Difference]: Without dead ends: 13725
[2023-11-29 04:30:16,393 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8923 GetRequests, 8921 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 04:30:16,393 INFO  L413           NwaCegarLoop]: 20898 mSDtfsCounter, 12 mSDsluCounter, 41786 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62684 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:30:16,394 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62684 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:30:16,409 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13725 states.
[2023-11-29 04:30:16,515 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13725 to 13717.
[2023-11-29 04:30:16,527 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13717 states, 13716 states have (on average 1.6686351706036746) internal successors, (22887), 13716 states have internal predecessors, (22887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:30:16,544 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13717 states to 13717 states and 22887 transitions.
[2023-11-29 04:30:16,544 INFO  L78                 Accepts]: Start accepts. Automaton has 13717 states and 22887 transitions. Word has length 8924
[2023-11-29 04:30:16,548 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:30:16,548 INFO  L495      AbstractCegarLoop]: Abstraction has 13717 states and 22887 transitions.
[2023-11-29 04:30:16,550 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.0) internal successors, (8924), 4 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:30:16,550 INFO  L276                IsEmpty]: Start isEmpty. Operand 13717 states and 22887 transitions.
[2023-11-29 04:30:16,975 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8925
[2023-11-29 04:30:16,976 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:30:16,977 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:30:17,080 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-29 04:30:17,178 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-29 04:30:17,178 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:30:17,178 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:30:17,179 INFO  L85        PathProgramCache]: Analyzing trace with hash -1093598965, now seen corresponding path program 1 times
[2023-11-29 04:30:17,179 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:30:17,180 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521591916]
[2023-11-29 04:30:17,180 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:30:17,181 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:30:17,831 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:30:17,831 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551974130]
[2023-11-29 04:30:17,832 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:30:17,833 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:30:17,833 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:30:17,833 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:30:17,835 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-29 04:30:27,894 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:30:28,151 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39689 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:30:28,266 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:30:29,348 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 8 proven. 741 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked.
[2023-11-29 04:30:29,349 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:30:29,553 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked.
[2023-11-29 04:30:29,554 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:30:29,554 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521591916]
[2023-11-29 04:30:29,554 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:30:29,554 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551974130]
[2023-11-29 04:30:29,554 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551974130] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:30:29,555 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:30:29,560 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:30:29,560 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575333846]
[2023-11-29 04:30:29,560 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:30:29,567 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:30:29,567 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:30:29,572 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:30:29,572 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:30:29,574 INFO  L87              Difference]: Start difference. First operand 13717 states and 22887 transitions. Second operand  has 5 states, 5 states have (on average 1628.2) internal successors, (8141), 5 states have internal predecessors, (8141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:30:44,066 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:30:44,067 INFO  L93              Difference]: Finished difference Result 49495 states and 82279 transitions.
[2023-11-29 04:30:44,067 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:30:44,068 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1628.2) internal successors, (8141), 5 states have internal predecessors, (8141), 0 states have call successors, (0), 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 8924
[2023-11-29 04:30:44,074 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:30:44,093 INFO  L225             Difference]: With dead ends: 49495
[2023-11-29 04:30:44,093 INFO  L226             Difference]: Without dead ends: 25959
[2023-11-29 04:30:44,102 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17847 GetRequests, 17838 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:30:44,102 INFO  L413           NwaCegarLoop]: 35601 mSDtfsCounter, 37943 mSDsluCounter, 52005 mSDsCounter, 0 mSdLazyCounter, 19416 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37943 SdHoareTripleChecker+Valid, 87606 SdHoareTripleChecker+Invalid, 20374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 19416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time
[2023-11-29 04:30:44,103 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37943 Valid, 87606 Invalid, 20374 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 19416 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time]
[2023-11-29 04:30:44,123 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25959 states.
[2023-11-29 04:30:44,242 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25959 to 13719.
[2023-11-29 04:30:44,255 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13719 states, 13718 states have (on average 1.6685376877095786) internal successors, (22889), 13718 states have internal predecessors, (22889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:30:44,270 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13719 states to 13719 states and 22889 transitions.
[2023-11-29 04:30:44,270 INFO  L78                 Accepts]: Start accepts. Automaton has 13719 states and 22889 transitions. Word has length 8924
[2023-11-29 04:30:44,275 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:30:44,275 INFO  L495      AbstractCegarLoop]: Abstraction has 13719 states and 22889 transitions.
[2023-11-29 04:30:44,276 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1628.2) internal successors, (8141), 5 states have internal predecessors, (8141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:30:44,276 INFO  L276                IsEmpty]: Start isEmpty. Operand 13719 states and 22889 transitions.
[2023-11-29 04:30:44,568 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8926
[2023-11-29 04:30:44,569 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:30:44,570 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:30:44,671 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-29 04:30:44,771 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:30:44,771 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:30:44,771 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:30:44,772 INFO  L85        PathProgramCache]: Analyzing trace with hash 259373195, now seen corresponding path program 1 times
[2023-11-29 04:30:44,772 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:30:44,772 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784270763]
[2023-11-29 04:30:44,773 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:30:44,773 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:30:45,428 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:30:45,429 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995996185]
[2023-11-29 04:30:45,430 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:30:45,430 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:30:45,430 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:30:45,431 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:30:45,432 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-29 04:30:55,441 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:30:55,709 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39692 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:30:55,820 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:30:56,745 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 10 proven. 741 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked.
[2023-11-29 04:30:56,745 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:30:56,903 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked.
[2023-11-29 04:30:56,904 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:30:56,904 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784270763]
[2023-11-29 04:30:56,904 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:30:56,904 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995996185]
[2023-11-29 04:30:56,904 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [995996185] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:30:56,904 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:30:56,908 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:30:56,909 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869278473]
[2023-11-29 04:30:56,909 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:30:56,914 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:30:56,914 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:30:56,918 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:30:56,918 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:30:56,920 INFO  L87              Difference]: Start difference. First operand 13719 states and 22889 transitions. Second operand  has 5 states, 5 states have (on average 1628.8) internal successors, (8144), 5 states have internal predecessors, (8144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:31:11,245 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:31:11,246 INFO  L93              Difference]: Finished difference Result 49503 states and 82287 transitions.
[2023-11-29 04:31:11,246 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:31:11,247 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1628.8) internal successors, (8144), 5 states have internal predecessors, (8144), 0 states have call successors, (0), 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 8925
[2023-11-29 04:31:11,253 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:31:11,273 INFO  L225             Difference]: With dead ends: 49503
[2023-11-29 04:31:11,273 INFO  L226             Difference]: Without dead ends: 25960
[2023-11-29 04:31:11,286 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17849 GetRequests, 17840 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:31:11,286 INFO  L413           NwaCegarLoop]: 35593 mSDtfsCounter, 37937 mSDsluCounter, 51995 mSDsCounter, 0 mSdLazyCounter, 19416 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37937 SdHoareTripleChecker+Valid, 87588 SdHoareTripleChecker+Invalid, 20374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 19416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time
[2023-11-29 04:31:11,287 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37937 Valid, 87588 Invalid, 20374 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 19416 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time]
[2023-11-29 04:31:11,313 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25960 states.
[2023-11-29 04:31:11,454 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25960 to 13721.
[2023-11-29 04:31:11,467 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13721 states, 13720 states have (on average 1.6684402332361516) internal successors, (22891), 13720 states have internal predecessors, (22891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:31:11,482 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13721 states to 13721 states and 22891 transitions.
[2023-11-29 04:31:11,483 INFO  L78                 Accepts]: Start accepts. Automaton has 13721 states and 22891 transitions. Word has length 8925
[2023-11-29 04:31:11,487 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:31:11,487 INFO  L495      AbstractCegarLoop]: Abstraction has 13721 states and 22891 transitions.
[2023-11-29 04:31:11,489 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1628.8) internal successors, (8144), 5 states have internal predecessors, (8144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:31:11,489 INFO  L276                IsEmpty]: Start isEmpty. Operand 13721 states and 22891 transitions.
[2023-11-29 04:31:11,782 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8927
[2023-11-29 04:31:11,783 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:31:11,784 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:11,895 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-29 04:31:11,985 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:31:11,985 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:31:11,985 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:31:11,986 INFO  L85        PathProgramCache]: Analyzing trace with hash -1009372623, now seen corresponding path program 1 times
[2023-11-29 04:31:11,986 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:31:11,986 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552323500]
[2023-11-29 04:31:11,987 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:31:11,987 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:31:12,627 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:31:12,628 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311516739]
[2023-11-29 04:31:12,629 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:31:12,629 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:31:12,629 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:31:12,630 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:31:12,631 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-29 04:31:22,652 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:31:22,910 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39695 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:31:23,006 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:31:23,938 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 12 proven. 741 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked.
[2023-11-29 04:31:23,939 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:31:24,089 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked.
[2023-11-29 04:31:24,089 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:31:24,089 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552323500]
[2023-11-29 04:31:24,089 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:31:24,090 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311516739]
[2023-11-29 04:31:24,090 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [311516739] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:31:24,090 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:31:24,096 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:31:24,096 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518467564]
[2023-11-29 04:31:24,096 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:31:24,100 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:31:24,100 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:31:24,104 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:31:24,104 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:31:24,106 INFO  L87              Difference]: Start difference. First operand 13721 states and 22891 transitions. Second operand  has 5 states, 5 states have (on average 1629.4) internal successors, (8147), 5 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:31:36,689 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:31:36,689 INFO  L93              Difference]: Finished difference Result 49511 states and 82295 transitions.
[2023-11-29 04:31:36,689 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:31:36,690 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1629.4) internal successors, (8147), 5 states have internal predecessors, (8147), 0 states have call successors, (0), 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 8926
[2023-11-29 04:31:36,696 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:31:36,715 INFO  L225             Difference]: With dead ends: 49511
[2023-11-29 04:31:36,715 INFO  L226             Difference]: Without dead ends: 25961
[2023-11-29 04:31:36,726 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17851 GetRequests, 17842 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:31:36,727 INFO  L413           NwaCegarLoop]: 35585 mSDtfsCounter, 55463 mSDsluCounter, 34374 mSDsCounter, 0 mSdLazyCounter, 14176 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55463 SdHoareTripleChecker+Valid, 69959 SdHoareTripleChecker+Invalid, 15134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 14176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time
[2023-11-29 04:31:36,727 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [55463 Valid, 69959 Invalid, 15134 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 14176 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time]
[2023-11-29 04:31:36,749 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25961 states.
[2023-11-29 04:31:36,869 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25961 to 13723.
[2023-11-29 04:31:36,880 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13723 states, 13722 states have (on average 1.6683428071709663) internal successors, (22893), 13722 states have internal predecessors, (22893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:31:36,895 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13723 states to 13723 states and 22893 transitions.
[2023-11-29 04:31:36,895 INFO  L78                 Accepts]: Start accepts. Automaton has 13723 states and 22893 transitions. Word has length 8926
[2023-11-29 04:31:36,899 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:31:36,899 INFO  L495      AbstractCegarLoop]: Abstraction has 13723 states and 22893 transitions.
[2023-11-29 04:31:36,900 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1629.4) internal successors, (8147), 5 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:31:36,900 INFO  L276                IsEmpty]: Start isEmpty. Operand 13723 states and 22893 transitions.
[2023-11-29 04:31:37,192 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8928
[2023-11-29 04:31:37,192 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:31:37,194 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:31:37,307 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0
[2023-11-29 04:31:37,394 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2023-11-29 04:31:37,395 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:31:37,395 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:31:37,396 INFO  L85        PathProgramCache]: Analyzing trace with hash 1699288551, now seen corresponding path program 1 times
[2023-11-29 04:31:37,396 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:31:37,396 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008072550]
[2023-11-29 04:31:37,397 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:31:37,397 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:31:38,015 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:31:38,015 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748512953]
[2023-11-29 04:31:38,017 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:31:38,017 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:31:38,017 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:31:38,018 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:31:38,022 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-29 04:31:47,825 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:31:48,090 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39699 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:31:48,187 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:31:49,288 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 14 proven. 741 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked.
[2023-11-29 04:31:49,288 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:31:49,453 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked.
[2023-11-29 04:31:49,454 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:31:49,454 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008072550]
[2023-11-29 04:31:49,454 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:31:49,454 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748512953]
[2023-11-29 04:31:49,454 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748512953] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:31:49,454 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:31:49,460 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:31:49,461 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220803820]
[2023-11-29 04:31:49,461 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:31:49,464 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:31:49,464 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:31:49,468 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:31:49,468 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:31:49,470 INFO  L87              Difference]: Start difference. First operand 13723 states and 22893 transitions. Second operand  has 5 states, 5 states have (on average 1630.0) internal successors, (8150), 5 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:32:03,538 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:32:03,538 INFO  L93              Difference]: Finished difference Result 49519 states and 82303 transitions.
[2023-11-29 04:32:03,539 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:32:03,541 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1630.0) internal successors, (8150), 5 states have internal predecessors, (8150), 0 states have call successors, (0), 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 8927
[2023-11-29 04:32:03,548 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:32:03,726 INFO  L225             Difference]: With dead ends: 49519
[2023-11-29 04:32:03,726 INFO  L226             Difference]: Without dead ends: 25962
[2023-11-29 04:32:03,732 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17853 GetRequests, 17844 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:32:03,732 INFO  L413           NwaCegarLoop]: 35577 mSDtfsCounter, 37925 mSDsluCounter, 51975 mSDsCounter, 0 mSdLazyCounter, 19416 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37925 SdHoareTripleChecker+Valid, 87552 SdHoareTripleChecker+Invalid, 20374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 19416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time
[2023-11-29 04:32:03,733 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37925 Valid, 87552 Invalid, 20374 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 19416 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time]
[2023-11-29 04:32:03,749 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25962 states.
[2023-11-29 04:32:03,857 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25962 to 13725.
[2023-11-29 04:32:03,869 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13725 states, 13724 states have (on average 1.668245409501603) internal successors, (22895), 13724 states have internal predecessors, (22895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:32:03,883 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13725 states to 13725 states and 22895 transitions.
[2023-11-29 04:32:03,884 INFO  L78                 Accepts]: Start accepts. Automaton has 13725 states and 22895 transitions. Word has length 8927
[2023-11-29 04:32:03,888 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:32:03,888 INFO  L495      AbstractCegarLoop]: Abstraction has 13725 states and 22895 transitions.
[2023-11-29 04:32:03,889 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1630.0) internal successors, (8150), 5 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:32:03,889 INFO  L276                IsEmpty]: Start isEmpty. Operand 13725 states and 22895 transitions.
[2023-11-29 04:32:04,181 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8929
[2023-11-29 04:32:04,181 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:32:04,183 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:32:04,289 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-29 04:32:04,383 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21
[2023-11-29 04:32:04,383 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:32:04,384 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:32:04,385 INFO  L85        PathProgramCache]: Analyzing trace with hash -669693735, now seen corresponding path program 1 times
[2023-11-29 04:32:04,385 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:32:04,385 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270687381]
[2023-11-29 04:32:04,386 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:32:04,386 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:32:05,006 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:32:05,006 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360027918]
[2023-11-29 04:32:05,008 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:32:05,008 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:32:05,008 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:32:05,009 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:32:05,010 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-29 04:32:14,723 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:32:14,979 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39702 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:32:15,083 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:32:16,200 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 16 proven. 741 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked.
[2023-11-29 04:32:16,200 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:32:16,365 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked.
[2023-11-29 04:32:16,365 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:32:16,365 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270687381]
[2023-11-29 04:32:16,365 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:32:16,365 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360027918]
[2023-11-29 04:32:16,365 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360027918] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:32:16,366 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:32:16,370 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:32:16,370 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328652162]
[2023-11-29 04:32:16,370 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:32:16,374 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:32:16,374 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:32:16,377 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:32:16,377 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:32:16,379 INFO  L87              Difference]: Start difference. First operand 13725 states and 22895 transitions. Second operand  has 5 states, 5 states have (on average 1630.6) internal successors, (8153), 5 states have internal predecessors, (8153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:32:30,988 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:32:30,988 INFO  L93              Difference]: Finished difference Result 49527 states and 82311 transitions.
[2023-11-29 04:32:30,988 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:32:30,990 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1630.6) internal successors, (8153), 5 states have internal predecessors, (8153), 0 states have call successors, (0), 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 8928
[2023-11-29 04:32:30,995 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:32:31,010 INFO  L225             Difference]: With dead ends: 49527
[2023-11-29 04:32:31,010 INFO  L226             Difference]: Without dead ends: 25963
[2023-11-29 04:32:31,017 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17855 GetRequests, 17846 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:32:31,017 INFO  L413           NwaCegarLoop]: 35569 mSDtfsCounter, 37919 mSDsluCounter, 51965 mSDsCounter, 0 mSdLazyCounter, 19416 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37919 SdHoareTripleChecker+Valid, 87534 SdHoareTripleChecker+Invalid, 20374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 19416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time
[2023-11-29 04:32:31,017 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37919 Valid, 87534 Invalid, 20374 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 19416 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time]
[2023-11-29 04:32:31,038 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25963 states.
[2023-11-29 04:32:31,152 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25963 to 13727.
[2023-11-29 04:32:31,164 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13727 states, 13726 states have (on average 1.6681480402156492) internal successors, (22897), 13726 states have internal predecessors, (22897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:32:31,178 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13727 states to 13727 states and 22897 transitions.
[2023-11-29 04:32:31,179 INFO  L78                 Accepts]: Start accepts. Automaton has 13727 states and 22897 transitions. Word has length 8928
[2023-11-29 04:32:31,183 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:32:31,183 INFO  L495      AbstractCegarLoop]: Abstraction has 13727 states and 22897 transitions.
[2023-11-29 04:32:31,184 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1630.6) internal successors, (8153), 5 states have internal predecessors, (8153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:32:31,184 INFO  L276                IsEmpty]: Start isEmpty. Operand 13727 states and 22897 transitions.
[2023-11-29 04:32:31,477 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8930
[2023-11-29 04:32:31,477 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:32:31,478 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:32:31,584 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0
[2023-11-29 04:32:31,679 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22
[2023-11-29 04:32:31,679 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:32:31,679 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:32:31,681 INFO  L85        PathProgramCache]: Analyzing trace with hash 1388387777, now seen corresponding path program 1 times
[2023-11-29 04:32:31,681 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:32:31,681 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226442533]
[2023-11-29 04:32:31,683 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:32:31,683 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:32:32,318 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:32:32,318 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533574972]
[2023-11-29 04:32:32,320 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:32:32,320 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:32:32,320 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:32:32,321 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:32:32,322 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-29 04:32:42,019 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:32:42,281 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39705 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:32:42,382 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:32:43,433 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 18 proven. 741 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked.
[2023-11-29 04:32:43,433 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:32:43,605 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked.
[2023-11-29 04:32:43,605 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:32:43,606 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226442533]
[2023-11-29 04:32:43,606 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:32:43,606 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533574972]
[2023-11-29 04:32:43,606 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [533574972] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:32:43,606 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:32:43,610 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:32:43,610 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016093576]
[2023-11-29 04:32:43,610 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:32:43,614 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:32:43,614 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:32:43,617 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:32:43,617 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:32:43,619 INFO  L87              Difference]: Start difference. First operand 13727 states and 22897 transitions. Second operand  has 5 states, 5 states have (on average 1631.2) internal successors, (8156), 5 states have internal predecessors, (8156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:32:57,801 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:32:57,802 INFO  L93              Difference]: Finished difference Result 49535 states and 82319 transitions.
[2023-11-29 04:32:57,802 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:32:57,803 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1631.2) internal successors, (8156), 5 states have internal predecessors, (8156), 0 states have call successors, (0), 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 8929
[2023-11-29 04:32:57,810 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:32:57,831 INFO  L225             Difference]: With dead ends: 49535
[2023-11-29 04:32:57,831 INFO  L226             Difference]: Without dead ends: 25964
[2023-11-29 04:32:57,844 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17857 GetRequests, 17848 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:32:57,845 INFO  L413           NwaCegarLoop]: 35561 mSDtfsCounter, 37913 mSDsluCounter, 51955 mSDsCounter, 0 mSdLazyCounter, 19416 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37913 SdHoareTripleChecker+Valid, 87516 SdHoareTripleChecker+Invalid, 20374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 19416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time
[2023-11-29 04:32:57,845 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37913 Valid, 87516 Invalid, 20374 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 19416 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time]
[2023-11-29 04:32:57,870 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25964 states.
[2023-11-29 04:32:57,998 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25964 to 13729.
[2023-11-29 04:32:58,010 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13729 states, 13728 states have (on average 1.6680506993006994) internal successors, (22899), 13728 states have internal predecessors, (22899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:32:58,024 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13729 states to 13729 states and 22899 transitions.
[2023-11-29 04:32:58,025 INFO  L78                 Accepts]: Start accepts. Automaton has 13729 states and 22899 transitions. Word has length 8929
[2023-11-29 04:32:58,029 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:32:58,029 INFO  L495      AbstractCegarLoop]: Abstraction has 13729 states and 22899 transitions.
[2023-11-29 04:32:58,030 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1631.2) internal successors, (8156), 5 states have internal predecessors, (8156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:32:58,030 INFO  L276                IsEmpty]: Start isEmpty. Operand 13729 states and 22899 transitions.
[2023-11-29 04:32:58,326 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8931
[2023-11-29 04:32:58,326 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:32:58,327 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:32:58,429 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0
[2023-11-29 04:32:58,528 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:32:58,528 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:32:58,528 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:32:58,529 INFO  L85        PathProgramCache]: Analyzing trace with hash -1793614337, now seen corresponding path program 1 times
[2023-11-29 04:32:58,529 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:32:58,529 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883516293]
[2023-11-29 04:32:58,530 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:32:58,530 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:32:59,138 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:32:59,138 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135445015]
[2023-11-29 04:32:59,139 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:32:59,140 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:32:59,140 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:32:59,140 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:32:59,141 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-29 04:33:08,756 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:33:09,022 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39708 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:33:09,316 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:33:10,219 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 20 proven. 741 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked.
[2023-11-29 04:33:10,219 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:33:10,394 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked.
[2023-11-29 04:33:10,395 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:33:10,395 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883516293]
[2023-11-29 04:33:10,395 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:33:10,395 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135445015]
[2023-11-29 04:33:10,395 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135445015] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:33:10,395 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:33:10,399 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:33:10,400 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495027097]
[2023-11-29 04:33:10,400 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:33:10,403 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:33:10,403 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:33:10,407 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:33:10,407 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:33:10,409 INFO  L87              Difference]: Start difference. First operand 13729 states and 22899 transitions. Second operand  has 5 states, 5 states have (on average 1631.8) internal successors, (8159), 5 states have internal predecessors, (8159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:33:24,154 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:33:24,154 INFO  L93              Difference]: Finished difference Result 49543 states and 82327 transitions.
[2023-11-29 04:33:24,155 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:33:24,156 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1631.8) internal successors, (8159), 5 states have internal predecessors, (8159), 0 states have call successors, (0), 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 8930
[2023-11-29 04:33:24,162 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:33:24,177 INFO  L225             Difference]: With dead ends: 49543
[2023-11-29 04:33:24,177 INFO  L226             Difference]: Without dead ends: 25965
[2023-11-29 04:33:24,183 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17859 GetRequests, 17850 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:33:24,183 INFO  L413           NwaCegarLoop]: 35553 mSDtfsCounter, 37915 mSDsluCounter, 50909 mSDsCounter, 0 mSdLazyCounter, 18012 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37915 SdHoareTripleChecker+Valid, 86462 SdHoareTripleChecker+Invalid, 18970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 18012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time
[2023-11-29 04:33:24,184 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37915 Valid, 86462 Invalid, 18970 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 18012 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time]
[2023-11-29 04:33:24,204 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25965 states.
[2023-11-29 04:33:24,312 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25965 to 13731.
[2023-11-29 04:33:24,323 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13731 states, 13730 states have (on average 1.6679533867443554) internal successors, (22901), 13730 states have internal predecessors, (22901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:33:24,337 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13731 states to 13731 states and 22901 transitions.
[2023-11-29 04:33:24,337 INFO  L78                 Accepts]: Start accepts. Automaton has 13731 states and 22901 transitions. Word has length 8930
[2023-11-29 04:33:24,341 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:33:24,341 INFO  L495      AbstractCegarLoop]: Abstraction has 13731 states and 22901 transitions.
[2023-11-29 04:33:24,343 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1631.8) internal successors, (8159), 5 states have internal predecessors, (8159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:33:24,343 INFO  L276                IsEmpty]: Start isEmpty. Operand 13731 states and 22901 transitions.
[2023-11-29 04:33:24,634 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8932
[2023-11-29 04:33:24,634 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:33:24,636 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:33:24,741 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0
[2023-11-29 04:33:24,836 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:33:24,837 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:33:24,837 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:33:24,838 INFO  L85        PathProgramCache]: Analyzing trace with hash -1305394147, now seen corresponding path program 1 times
[2023-11-29 04:33:24,838 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:33:24,838 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285398069]
[2023-11-29 04:33:24,839 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:33:24,839 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:33:25,479 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:33:25,479 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043889981]
[2023-11-29 04:33:25,480 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:33:25,481 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:33:25,481 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:33:25,481 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:33:25,482 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-29 04:33:35,615 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:33:35,897 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39712 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:33:36,022 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:33:37,086 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 22 proven. 741 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked.
[2023-11-29 04:33:37,086 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:33:37,243 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked.
[2023-11-29 04:33:37,243 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:33:37,243 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285398069]
[2023-11-29 04:33:37,244 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:33:37,244 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043889981]
[2023-11-29 04:33:37,244 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043889981] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:33:37,244 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:33:37,250 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:33:37,250 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892394826]
[2023-11-29 04:33:37,251 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:33:37,256 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:33:37,256 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:33:37,259 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:33:37,259 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:33:37,261 INFO  L87              Difference]: Start difference. First operand 13731 states and 22901 transitions. Second operand  has 5 states, 5 states have (on average 1632.4) internal successors, (8162), 5 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:33:51,485 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:33:51,486 INFO  L93              Difference]: Finished difference Result 49551 states and 82335 transitions.
[2023-11-29 04:33:51,486 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:33:51,487 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1632.4) internal successors, (8162), 5 states have internal predecessors, (8162), 0 states have call successors, (0), 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 8931
[2023-11-29 04:33:51,492 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:33:51,508 INFO  L225             Difference]: With dead ends: 49551
[2023-11-29 04:33:51,508 INFO  L226             Difference]: Without dead ends: 25966
[2023-11-29 04:33:51,514 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17861 GetRequests, 17852 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:33:51,515 INFO  L413           NwaCegarLoop]: 35545 mSDtfsCounter, 37901 mSDsluCounter, 51935 mSDsCounter, 0 mSdLazyCounter, 19416 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37901 SdHoareTripleChecker+Valid, 87480 SdHoareTripleChecker+Invalid, 20374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 19416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time
[2023-11-29 04:33:51,515 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37901 Valid, 87480 Invalid, 20374 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 19416 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time]
[2023-11-29 04:33:51,535 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25966 states.
[2023-11-29 04:33:51,649 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25966 to 13733.
[2023-11-29 04:33:51,661 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13733 states, 13732 states have (on average 1.6678561025342267) internal successors, (22903), 13732 states have internal predecessors, (22903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:33:51,675 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13733 states to 13733 states and 22903 transitions.
[2023-11-29 04:33:51,676 INFO  L78                 Accepts]: Start accepts. Automaton has 13733 states and 22903 transitions. Word has length 8931
[2023-11-29 04:33:51,680 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:33:51,680 INFO  L495      AbstractCegarLoop]: Abstraction has 13733 states and 22903 transitions.
[2023-11-29 04:33:51,681 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1632.4) internal successors, (8162), 5 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:33:51,681 INFO  L276                IsEmpty]: Start isEmpty. Operand 13733 states and 22903 transitions.
[2023-11-29 04:33:51,974 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8933
[2023-11-29 04:33:51,974 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:33:51,975 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:33:52,077 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0
[2023-11-29 04:33:52,176 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25
[2023-11-29 04:33:52,176 INFO  L420      AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:33:52,176 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:33:52,178 INFO  L85        PathProgramCache]: Analyzing trace with hash -487168601, now seen corresponding path program 1 times
[2023-11-29 04:33:52,178 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:33:52,178 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857212168]
[2023-11-29 04:33:52,179 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:33:52,179 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:33:52,865 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:33:52,865 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727725588]
[2023-11-29 04:33:52,868 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:33:52,868 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:33:52,868 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:33:52,869 INFO  L229       MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:33:52,870 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process
[2023-11-29 04:34:02,535 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:34:02,800 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39715 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:34:02,899 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:34:03,807 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 24 proven. 741 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked.
[2023-11-29 04:34:03,807 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:34:04,162 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked.
[2023-11-29 04:34:04,162 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:34:04,162 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857212168]
[2023-11-29 04:34:04,162 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:34:04,163 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727725588]
[2023-11-29 04:34:04,163 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727725588] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:34:04,163 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:34:04,167 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:34:04,167 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289375066]
[2023-11-29 04:34:04,167 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:34:04,171 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:34:04,171 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:34:04,174 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:34:04,174 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:34:04,176 INFO  L87              Difference]: Start difference. First operand 13733 states and 22903 transitions. Second operand  has 5 states, 5 states have (on average 1633.0) internal successors, (8165), 5 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:34:16,354 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:34:16,354 INFO  L93              Difference]: Finished difference Result 49559 states and 82343 transitions.
[2023-11-29 04:34:16,354 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:34:16,356 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1633.0) internal successors, (8165), 5 states have internal predecessors, (8165), 0 states have call successors, (0), 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 8932
[2023-11-29 04:34:16,362 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:34:16,382 INFO  L225             Difference]: With dead ends: 49559
[2023-11-29 04:34:16,382 INFO  L226             Difference]: Without dead ends: 25967
[2023-11-29 04:34:16,394 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17863 GetRequests, 17854 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:34:16,395 INFO  L413           NwaCegarLoop]: 35537 mSDtfsCounter, 55415 mSDsluCounter, 34344 mSDsCounter, 0 mSdLazyCounter, 14176 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55415 SdHoareTripleChecker+Valid, 69881 SdHoareTripleChecker+Invalid, 15134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 14176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time
[2023-11-29 04:34:16,395 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [55415 Valid, 69881 Invalid, 15134 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 14176 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time]
[2023-11-29 04:34:16,418 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25967 states.
[2023-11-29 04:34:16,550 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25967 to 13735.
[2023-11-29 04:34:16,561 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13735 states, 13734 states have (on average 1.6677588466579292) internal successors, (22905), 13734 states have internal predecessors, (22905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:34:16,576 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13735 states to 13735 states and 22905 transitions.
[2023-11-29 04:34:16,576 INFO  L78                 Accepts]: Start accepts. Automaton has 13735 states and 22905 transitions. Word has length 8932
[2023-11-29 04:34:16,581 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:34:16,581 INFO  L495      AbstractCegarLoop]: Abstraction has 13735 states and 22905 transitions.
[2023-11-29 04:34:16,582 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1633.0) internal successors, (8165), 5 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:34:16,583 INFO  L276                IsEmpty]: Start isEmpty. Operand 13735 states and 22905 transitions.
[2023-11-29 04:34:16,981 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8934
[2023-11-29 04:34:16,982 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:34:16,983 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:34:17,083 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0
[2023-11-29 04:34:17,183 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:34:17,184 INFO  L420      AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:34:17,185 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:34:17,186 INFO  L85        PathProgramCache]: Analyzing trace with hash -144472073, now seen corresponding path program 1 times
[2023-11-29 04:34:17,186 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:34:17,186 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569884009]
[2023-11-29 04:34:17,187 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:34:17,187 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:34:17,856 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:34:17,857 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219020226]
[2023-11-29 04:34:17,859 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:34:17,859 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:34:17,859 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:34:17,860 INFO  L229       MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:34:17,861 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process
[2023-11-29 04:34:27,936 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:34:28,199 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39718 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:34:28,295 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:34:29,221 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 26 proven. 741 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked.
[2023-11-29 04:34:29,221 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:34:29,382 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked.
[2023-11-29 04:34:29,383 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:34:29,383 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569884009]
[2023-11-29 04:34:29,383 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:34:29,383 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219020226]
[2023-11-29 04:34:29,383 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [219020226] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:34:29,383 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:34:29,387 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:34:29,387 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860712997]
[2023-11-29 04:34:29,387 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:34:29,391 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:34:29,391 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:34:29,395 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:34:29,395 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:34:29,396 INFO  L87              Difference]: Start difference. First operand 13735 states and 22905 transitions. Second operand  has 5 states, 5 states have (on average 1633.6) internal successors, (8168), 5 states have internal predecessors, (8168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:34:42,915 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:34:42,916 INFO  L93              Difference]: Finished difference Result 49567 states and 82351 transitions.
[2023-11-29 04:34:42,916 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:34:42,918 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1633.6) internal successors, (8168), 5 states have internal predecessors, (8168), 0 states have call successors, (0), 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 8933
[2023-11-29 04:34:42,924 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:34:42,944 INFO  L225             Difference]: With dead ends: 49567
[2023-11-29 04:34:42,944 INFO  L226             Difference]: Without dead ends: 25968
[2023-11-29 04:34:42,956 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17865 GetRequests, 17856 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:34:42,957 INFO  L413           NwaCegarLoop]: 35529 mSDtfsCounter, 37900 mSDsluCounter, 50885 mSDsCounter, 0 mSdLazyCounter, 18012 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37900 SdHoareTripleChecker+Valid, 86414 SdHoareTripleChecker+Invalid, 18970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 18012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time
[2023-11-29 04:34:42,957 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37900 Valid, 86414 Invalid, 18970 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 18012 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time]
[2023-11-29 04:34:42,980 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25968 states.
[2023-11-29 04:34:43,107 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25968 to 13737.
[2023-11-29 04:34:43,119 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13737 states, 13736 states have (on average 1.6676616191030869) internal successors, (22907), 13736 states have internal predecessors, (22907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:34:43,133 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 22907 transitions.
[2023-11-29 04:34:43,133 INFO  L78                 Accepts]: Start accepts. Automaton has 13737 states and 22907 transitions. Word has length 8933
[2023-11-29 04:34:43,137 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:34:43,137 INFO  L495      AbstractCegarLoop]: Abstraction has 13737 states and 22907 transitions.
[2023-11-29 04:34:43,139 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1633.6) internal successors, (8168), 5 states have internal predecessors, (8168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:34:43,139 INFO  L276                IsEmpty]: Start isEmpty. Operand 13737 states and 22907 transitions.
[2023-11-29 04:34:43,550 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8935
[2023-11-29 04:34:43,550 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:34:43,552 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:34:43,653 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0
[2023-11-29 04:34:43,752 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27
[2023-11-29 04:34:43,753 INFO  L420      AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:34:43,754 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:34:43,755 INFO  L85        PathProgramCache]: Analyzing trace with hash 1505844941, now seen corresponding path program 1 times
[2023-11-29 04:34:43,755 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:34:43,755 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804771148]
[2023-11-29 04:34:43,756 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:34:43,756 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:34:44,365 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:34:44,365 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274166451]
[2023-11-29 04:34:44,366 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:34:44,366 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:34:44,366 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:34:44,367 INFO  L229       MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:34:44,368 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process
[2023-11-29 04:34:54,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:34:54,571 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39721 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:34:54,661 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:34:55,559 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 28 proven. 741 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked.
[2023-11-29 04:34:55,559 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:34:55,725 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked.
[2023-11-29 04:34:55,726 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:34:55,726 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804771148]
[2023-11-29 04:34:55,726 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:34:55,726 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274166451]
[2023-11-29 04:34:55,726 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274166451] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:34:55,726 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:34:55,730 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:34:55,730 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988015500]
[2023-11-29 04:34:55,730 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:34:55,734 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:34:55,734 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:34:55,739 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:34:55,739 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:34:55,741 INFO  L87              Difference]: Start difference. First operand 13737 states and 22907 transitions. Second operand  has 5 states, 5 states have (on average 1634.2) internal successors, (8171), 5 states have internal predecessors, (8171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:35:10,676 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:35:10,676 INFO  L93              Difference]: Finished difference Result 49575 states and 82359 transitions.
[2023-11-29 04:35:10,676 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:35:10,678 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1634.2) internal successors, (8171), 5 states have internal predecessors, (8171), 0 states have call successors, (0), 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 8934
[2023-11-29 04:35:10,683 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:35:10,697 INFO  L225             Difference]: With dead ends: 49575
[2023-11-29 04:35:10,697 INFO  L226             Difference]: Without dead ends: 25969
[2023-11-29 04:35:10,703 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17867 GetRequests, 17858 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:35:10,703 INFO  L413           NwaCegarLoop]: 35521 mSDtfsCounter, 37883 mSDsluCounter, 51905 mSDsCounter, 0 mSdLazyCounter, 19416 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37883 SdHoareTripleChecker+Valid, 87426 SdHoareTripleChecker+Invalid, 20374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 19416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:35:10,704 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37883 Valid, 87426 Invalid, 20374 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 19416 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time]
[2023-11-29 04:35:10,722 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25969 states.
[2023-11-29 04:35:10,829 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25969 to 13739.
[2023-11-29 04:35:10,841 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13739 states, 13738 states have (on average 1.66756441985733) internal successors, (22909), 13738 states have internal predecessors, (22909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:35:10,855 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13739 states to 13739 states and 22909 transitions.
[2023-11-29 04:35:10,855 INFO  L78                 Accepts]: Start accepts. Automaton has 13739 states and 22909 transitions. Word has length 8934
[2023-11-29 04:35:10,859 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:35:10,859 INFO  L495      AbstractCegarLoop]: Abstraction has 13739 states and 22909 transitions.
[2023-11-29 04:35:10,860 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1634.2) internal successors, (8171), 5 states have internal predecessors, (8171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:35:10,860 INFO  L276                IsEmpty]: Start isEmpty. Operand 13739 states and 22909 transitions.
[2023-11-29 04:35:11,153 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8936
[2023-11-29 04:35:11,153 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:35:11,155 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:35:11,259 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0
[2023-11-29 04:35:11,355 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:35:11,356 INFO  L420      AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:35:11,356 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:35:11,357 INFO  L85        PathProgramCache]: Analyzing trace with hash 442070867, now seen corresponding path program 1 times
[2023-11-29 04:35:11,357 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:35:11,357 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702056662]
[2023-11-29 04:35:11,358 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:35:11,358 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:35:12,058 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:35:12,058 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942704552]
[2023-11-29 04:35:12,059 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:35:12,059 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:35:12,060 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:35:12,060 INFO  L229       MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:35:12,061 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process
[2023-11-29 04:35:22,331 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:35:22,706 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39725 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:35:22,832 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:35:24,324 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 30 proven. 741 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked.
[2023-11-29 04:35:24,324 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:35:24,540 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked.
[2023-11-29 04:35:24,541 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:35:24,541 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702056662]
[2023-11-29 04:35:24,541 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:35:24,541 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942704552]
[2023-11-29 04:35:24,541 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [942704552] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:35:24,541 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:35:24,549 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:35:24,549 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555123473]
[2023-11-29 04:35:24,549 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:35:24,554 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:35:24,554 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:35:24,559 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:35:24,559 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:35:24,562 INFO  L87              Difference]: Start difference. First operand 13739 states and 22909 transitions. Second operand  has 5 states, 5 states have (on average 1634.8) internal successors, (8174), 5 states have internal predecessors, (8174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:35:40,479 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:35:40,479 INFO  L93              Difference]: Finished difference Result 49583 states and 82367 transitions.
[2023-11-29 04:35:40,479 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:35:40,481 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1634.8) internal successors, (8174), 5 states have internal predecessors, (8174), 0 states have call successors, (0), 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 8935
[2023-11-29 04:35:40,489 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:35:40,515 INFO  L225             Difference]: With dead ends: 49583
[2023-11-29 04:35:40,515 INFO  L226             Difference]: Without dead ends: 25970
[2023-11-29 04:35:40,531 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17869 GetRequests, 17860 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:35:40,531 INFO  L413           NwaCegarLoop]: 35513 mSDtfsCounter, 55378 mSDsluCounter, 34330 mSDsCounter, 0 mSdLazyCounter, 14176 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55378 SdHoareTripleChecker+Valid, 69843 SdHoareTripleChecker+Invalid, 15134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 14176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time
[2023-11-29 04:35:40,532 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [55378 Valid, 69843 Invalid, 15134 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [958 Valid, 14176 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time]
[2023-11-29 04:35:40,562 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25970 states.
[2023-11-29 04:35:40,742 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25970 to 13741.
[2023-11-29 04:35:40,757 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13741 states, 13740 states have (on average 1.667467248908297) internal successors, (22911), 13740 states have internal predecessors, (22911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:35:40,777 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13741 states to 13741 states and 22911 transitions.
[2023-11-29 04:35:40,778 INFO  L78                 Accepts]: Start accepts. Automaton has 13741 states and 22911 transitions. Word has length 8935
[2023-11-29 04:35:40,783 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:35:40,783 INFO  L495      AbstractCegarLoop]: Abstraction has 13741 states and 22911 transitions.
[2023-11-29 04:35:40,786 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1634.8) internal successors, (8174), 5 states have internal predecessors, (8174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:35:40,786 INFO  L276                IsEmpty]: Start isEmpty. Operand 13741 states and 22911 transitions.
[2023-11-29 04:35:41,336 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8937
[2023-11-29 04:35:41,336 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:35:41,338 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:35:41,487 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0
[2023-11-29 04:35:41,539 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:35:41,539 INFO  L420      AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:35:41,541 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:35:41,542 INFO  L85        PathProgramCache]: Analyzing trace with hash 406837109, now seen corresponding path program 1 times
[2023-11-29 04:35:41,542 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:35:41,542 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228496287]
[2023-11-29 04:35:41,544 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:35:41,544 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:35:42,442 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:35:42,442 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816135989]
[2023-11-29 04:35:42,444 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:35:42,444 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:35:42,444 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:35:42,445 INFO  L229       MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:35:42,446 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process
[2023-11-29 04:35:54,121 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:35:54,469 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39728 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:35:54,593 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:35:55,721 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 32 proven. 741 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked.
[2023-11-29 04:35:55,721 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:35:55,935 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked.
[2023-11-29 04:35:55,935 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:35:55,935 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228496287]
[2023-11-29 04:35:55,935 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:35:55,935 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816135989]
[2023-11-29 04:35:55,935 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [816135989] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:35:55,935 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:35:55,941 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:35:55,941 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022094257]
[2023-11-29 04:35:55,941 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:35:55,946 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:35:55,946 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:35:55,951 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:35:55,951 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:35:55,953 INFO  L87              Difference]: Start difference. First operand 13741 states and 22911 transitions. Second operand  has 5 states, 5 states have (on average 1635.4) internal successors, (8177), 5 states have internal predecessors, (8177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:36:09,794 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:36:09,794 INFO  L93              Difference]: Finished difference Result 49591 states and 82375 transitions.
[2023-11-29 04:36:09,794 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:36:09,795 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1635.4) internal successors, (8177), 5 states have internal predecessors, (8177), 0 states have call successors, (0), 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 8936
[2023-11-29 04:36:09,801 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:36:09,820 INFO  L225             Difference]: With dead ends: 49591
[2023-11-29 04:36:09,820 INFO  L226             Difference]: Without dead ends: 25971
[2023-11-29 04:36:09,833 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17871 GetRequests, 17862 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:36:09,833 INFO  L413           NwaCegarLoop]: 35505 mSDtfsCounter, 55383 mSDsluCounter, 34324 mSDsCounter, 0 mSdLazyCounter, 14176 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55383 SdHoareTripleChecker+Valid, 69829 SdHoareTripleChecker+Invalid, 15134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 14176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time
[2023-11-29 04:36:09,834 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [55383 Valid, 69829 Invalid, 15134 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 14176 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time]
[2023-11-29 04:36:09,856 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25971 states.
[2023-11-29 04:36:09,992 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25971 to 13743.
[2023-11-29 04:36:10,004 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13743 states, 13742 states have (on average 1.6673701062436326) internal successors, (22913), 13742 states have internal predecessors, (22913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:36:10,021 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13743 states to 13743 states and 22913 transitions.
[2023-11-29 04:36:10,021 INFO  L78                 Accepts]: Start accepts. Automaton has 13743 states and 22913 transitions. Word has length 8936
[2023-11-29 04:36:10,026 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:36:10,026 INFO  L495      AbstractCegarLoop]: Abstraction has 13743 states and 22913 transitions.
[2023-11-29 04:36:10,027 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1635.4) internal successors, (8177), 5 states have internal predecessors, (8177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:36:10,027 INFO  L276                IsEmpty]: Start isEmpty. Operand 13743 states and 22913 transitions.
[2023-11-29 04:36:10,324 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8938
[2023-11-29 04:36:10,324 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:36:10,326 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:36:10,426 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0
[2023-11-29 04:36:10,526 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:36:10,526 INFO  L420      AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:36:10,527 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:36:10,528 INFO  L85        PathProgramCache]: Analyzing trace with hash 1341814573, now seen corresponding path program 1 times
[2023-11-29 04:36:10,528 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:36:10,528 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047399652]
[2023-11-29 04:36:10,528 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:36:10,528 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:36:11,172 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:36:11,172 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140803141]
[2023-11-29 04:36:11,174 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:36:11,174 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:36:11,174 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:36:11,175 INFO  L229       MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:36:11,176 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process
[2023-11-29 04:36:21,586 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:36:21,842 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39731 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:36:21,947 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:36:22,941 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 34 proven. 741 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked.
[2023-11-29 04:36:22,941 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:36:23,117 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 758 trivial. 0 not checked.
[2023-11-29 04:36:23,117 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:36:23,117 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047399652]
[2023-11-29 04:36:23,117 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:36:23,117 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140803141]
[2023-11-29 04:36:23,117 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140803141] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:36:23,117 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:36:23,122 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:36:23,122 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990560622]
[2023-11-29 04:36:23,122 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:36:23,126 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:36:23,126 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:36:23,129 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:36:23,129 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:36:23,131 INFO  L87              Difference]: Start difference. First operand 13743 states and 22913 transitions. Second operand  has 5 states, 5 states have (on average 1636.0) internal successors, (8180), 5 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:36:35,503 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:36:35,504 INFO  L93              Difference]: Finished difference Result 49599 states and 82383 transitions.
[2023-11-29 04:36:35,504 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:36:35,505 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1636.0) internal successors, (8180), 5 states have internal predecessors, (8180), 0 states have call successors, (0), 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 8937
[2023-11-29 04:36:35,511 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:36:35,529 INFO  L225             Difference]: With dead ends: 49599
[2023-11-29 04:36:35,529 INFO  L226             Difference]: Without dead ends: 25972
[2023-11-29 04:36:35,538 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17873 GetRequests, 17864 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:36:35,539 INFO  L413           NwaCegarLoop]: 35497 mSDtfsCounter, 55375 mSDsluCounter, 34319 mSDsCounter, 0 mSdLazyCounter, 14176 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55375 SdHoareTripleChecker+Valid, 69816 SdHoareTripleChecker+Invalid, 15134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 14176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time
[2023-11-29 04:36:35,539 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [55375 Valid, 69816 Invalid, 15134 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 14176 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time]
[2023-11-29 04:36:35,560 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25972 states.
[2023-11-29 04:36:35,680 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25972 to 13745.
[2023-11-29 04:36:35,692 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13745 states, 13744 states have (on average 1.6672729918509894) internal successors, (22915), 13744 states have internal predecessors, (22915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:36:35,707 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13745 states to 13745 states and 22915 transitions.
[2023-11-29 04:36:35,707 INFO  L78                 Accepts]: Start accepts. Automaton has 13745 states and 22915 transitions. Word has length 8937
[2023-11-29 04:36:35,712 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:36:35,712 INFO  L495      AbstractCegarLoop]: Abstraction has 13745 states and 22915 transitions.
[2023-11-29 04:36:35,713 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1636.0) internal successors, (8180), 5 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:36:35,713 INFO  L276                IsEmpty]: Start isEmpty. Operand 13745 states and 22915 transitions.
[2023-11-29 04:36:36,011 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8939
[2023-11-29 04:36:36,011 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:36:36,013 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:36:36,117 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0
[2023-11-29 04:36:36,213 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:36:36,214 INFO  L420      AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:36:36,214 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:36:36,215 INFO  L85        PathProgramCache]: Analyzing trace with hash 1755247771, now seen corresponding path program 1 times
[2023-11-29 04:36:36,215 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:36:36,215 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951179453]
[2023-11-29 04:36:36,216 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:36:36,216 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:36:36,836 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:36:36,836 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788329633]
[2023-11-29 04:36:36,838 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:36:36,838 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:36:36,838 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:36:36,839 INFO  L229       MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:36:36,839 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process
[2023-11-29 04:36:46,780 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:36:47,080 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39734 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:36:47,230 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:36:48,246 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 36 proven. 741 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2023-11-29 04:36:48,246 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:36:48,423 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked.
[2023-11-29 04:36:48,424 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:36:48,424 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951179453]
[2023-11-29 04:36:48,424 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:36:48,424 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788329633]
[2023-11-29 04:36:48,424 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [788329633] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:36:48,424 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:36:48,430 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:36:48,430 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103637252]
[2023-11-29 04:36:48,430 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:36:48,434 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:36:48,434 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:36:48,438 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:36:48,438 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:36:48,440 INFO  L87              Difference]: Start difference. First operand 13745 states and 22915 transitions. Second operand  has 5 states, 5 states have (on average 1636.6) internal successors, (8183), 5 states have internal predecessors, (8183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:37:03,176 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:37:03,177 INFO  L93              Difference]: Finished difference Result 49607 states and 82391 transitions.
[2023-11-29 04:37:03,177 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:37:03,179 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1636.6) internal successors, (8183), 5 states have internal predecessors, (8183), 0 states have call successors, (0), 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 8938
[2023-11-29 04:37:03,184 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:37:03,205 INFO  L225             Difference]: With dead ends: 49607
[2023-11-29 04:37:03,205 INFO  L226             Difference]: Without dead ends: 25973
[2023-11-29 04:37:03,215 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17875 GetRequests, 17866 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:37:03,215 INFO  L413           NwaCegarLoop]: 35489 mSDtfsCounter, 37875 mSDsluCounter, 50845 mSDsCounter, 0 mSdLazyCounter, 18012 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37875 SdHoareTripleChecker+Valid, 86334 SdHoareTripleChecker+Invalid, 18970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 18012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time
[2023-11-29 04:37:03,216 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37875 Valid, 86334 Invalid, 18970 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [958 Valid, 18012 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time]
[2023-11-29 04:37:03,241 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25973 states.
[2023-11-29 04:37:03,388 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25973 to 13747.
[2023-11-29 04:37:03,401 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13747 states, 13746 states have (on average 1.667175905718027) internal successors, (22917), 13746 states have internal predecessors, (22917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:37:03,421 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13747 states to 13747 states and 22917 transitions.
[2023-11-29 04:37:03,421 INFO  L78                 Accepts]: Start accepts. Automaton has 13747 states and 22917 transitions. Word has length 8938
[2023-11-29 04:37:03,426 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:37:03,426 INFO  L495      AbstractCegarLoop]: Abstraction has 13747 states and 22917 transitions.
[2023-11-29 04:37:03,428 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1636.6) internal successors, (8183), 5 states have internal predecessors, (8183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:37:03,428 INFO  L276                IsEmpty]: Start isEmpty. Operand 13747 states and 22917 transitions.
[2023-11-29 04:37:03,745 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8940
[2023-11-29 04:37:03,745 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:37:03,747 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:37:03,866 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0
[2023-11-29 04:37:03,947 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:37:03,948 INFO  L420      AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:37:03,948 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:37:03,949 INFO  L85        PathProgramCache]: Analyzing trace with hash -811651191, now seen corresponding path program 1 times
[2023-11-29 04:37:03,950 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:37:03,950 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350658098]
[2023-11-29 04:37:03,951 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:37:03,951 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:37:04,630 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:37:04,631 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27228831]
[2023-11-29 04:37:04,632 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:37:04,632 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:37:04,632 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:37:04,633 INFO  L229       MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:37:04,634 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process
[2023-11-29 04:37:14,371 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:37:14,621 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39738 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:37:14,710 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:37:15,590 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 38 proven. 741 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2023-11-29 04:37:15,590 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:37:15,778 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked.
[2023-11-29 04:37:15,778 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:37:15,778 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350658098]
[2023-11-29 04:37:15,778 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:37:15,778 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27228831]
[2023-11-29 04:37:15,778 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [27228831] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:37:15,778 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:37:15,783 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:37:15,783 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592736217]
[2023-11-29 04:37:15,783 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:37:15,787 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:37:15,787 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:37:15,790 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:37:15,790 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:37:15,792 INFO  L87              Difference]: Start difference. First operand 13747 states and 22917 transitions. Second operand  has 5 states, 5 states have (on average 1637.2) internal successors, (8186), 5 states have internal predecessors, (8186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:37:27,752 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:37:27,753 INFO  L93              Difference]: Finished difference Result 49615 states and 82399 transitions.
[2023-11-29 04:37:27,753 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:37:27,754 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1637.2) internal successors, (8186), 5 states have internal predecessors, (8186), 0 states have call successors, (0), 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 8939
[2023-11-29 04:37:27,760 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:37:27,777 INFO  L225             Difference]: With dead ends: 49615
[2023-11-29 04:37:27,777 INFO  L226             Difference]: Without dead ends: 25974
[2023-11-29 04:37:27,786 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17877 GetRequests, 17868 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:37:27,787 INFO  L413           NwaCegarLoop]: 35481 mSDtfsCounter, 55342 mSDsluCounter, 34310 mSDsCounter, 0 mSdLazyCounter, 14176 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55342 SdHoareTripleChecker+Valid, 69791 SdHoareTripleChecker+Invalid, 15134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 14176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time
[2023-11-29 04:37:27,787 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [55342 Valid, 69791 Invalid, 15134 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 14176 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time]
[2023-11-29 04:37:27,809 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25974 states.
[2023-11-29 04:37:27,943 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25974 to 13749.
[2023-11-29 04:37:27,955 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13749 states, 13748 states have (on average 1.667078847832412) internal successors, (22919), 13748 states have internal predecessors, (22919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:37:27,972 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13749 states to 13749 states and 22919 transitions.
[2023-11-29 04:37:27,973 INFO  L78                 Accepts]: Start accepts. Automaton has 13749 states and 22919 transitions. Word has length 8939
[2023-11-29 04:37:27,977 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:37:27,977 INFO  L495      AbstractCegarLoop]: Abstraction has 13749 states and 22919 transitions.
[2023-11-29 04:37:27,979 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1637.2) internal successors, (8186), 5 states have internal predecessors, (8186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:37:27,979 INFO  L276                IsEmpty]: Start isEmpty. Operand 13749 states and 22919 transitions.
[2023-11-29 04:37:28,307 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8941
[2023-11-29 04:37:28,307 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:37:28,309 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:37:28,438 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0
[2023-11-29 04:37:28,509 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:37:28,510 INFO  L420      AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:37:28,510 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:37:28,512 INFO  L85        PathProgramCache]: Analyzing trace with hash 1912413763, now seen corresponding path program 1 times
[2023-11-29 04:37:28,512 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:37:28,512 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920623091]
[2023-11-29 04:37:28,513 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:37:28,513 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:37:29,147 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:37:29,147 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981927983]
[2023-11-29 04:37:29,149 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:37:29,149 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:37:29,149 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:37:29,150 INFO  L229       MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:37:29,151 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process
[2023-11-29 04:37:39,738 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:37:40,020 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39741 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:37:40,127 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:37:41,101 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 40 proven. 741 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2023-11-29 04:37:41,102 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:37:41,289 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked.
[2023-11-29 04:37:41,289 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:37:41,289 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920623091]
[2023-11-29 04:37:41,289 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:37:41,289 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981927983]
[2023-11-29 04:37:41,289 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981927983] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:37:41,289 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:37:41,295 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:37:41,296 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135938436]
[2023-11-29 04:37:41,296 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:37:41,299 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:37:41,300 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:37:41,303 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:37:41,304 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:37:41,306 INFO  L87              Difference]: Start difference. First operand 13749 states and 22919 transitions. Second operand  has 5 states, 5 states have (on average 1637.8) internal successors, (8189), 5 states have internal predecessors, (8189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:37:56,645 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:37:56,645 INFO  L93              Difference]: Finished difference Result 49623 states and 82407 transitions.
[2023-11-29 04:37:56,645 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:37:56,647 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1637.8) internal successors, (8189), 5 states have internal predecessors, (8189), 0 states have call successors, (0), 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 8940
[2023-11-29 04:37:56,652 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:37:56,669 INFO  L225             Difference]: With dead ends: 49623
[2023-11-29 04:37:56,669 INFO  L226             Difference]: Without dead ends: 25975
[2023-11-29 04:37:56,678 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17879 GetRequests, 17870 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:37:56,678 INFO  L413           NwaCegarLoop]: 35473 mSDtfsCounter, 37847 mSDsluCounter, 51845 mSDsCounter, 0 mSdLazyCounter, 19416 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37847 SdHoareTripleChecker+Valid, 87318 SdHoareTripleChecker+Invalid, 20374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 19416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time
[2023-11-29 04:37:56,678 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37847 Valid, 87318 Invalid, 20374 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 19416 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time]
[2023-11-29 04:37:56,698 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25975 states.
[2023-11-29 04:37:56,820 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25975 to 13751.
[2023-11-29 04:37:56,832 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13751 states, 13750 states have (on average 1.6669818181818181) internal successors, (22921), 13750 states have internal predecessors, (22921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:37:56,847 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13751 states to 13751 states and 22921 transitions.
[2023-11-29 04:37:56,848 INFO  L78                 Accepts]: Start accepts. Automaton has 13751 states and 22921 transitions. Word has length 8940
[2023-11-29 04:37:56,852 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:37:56,852 INFO  L495      AbstractCegarLoop]: Abstraction has 13751 states and 22921 transitions.
[2023-11-29 04:37:56,853 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1637.8) internal successors, (8189), 5 states have internal predecessors, (8189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:37:56,853 INFO  L276                IsEmpty]: Start isEmpty. Operand 13751 states and 22921 transitions.
[2023-11-29 04:37:57,147 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8942
[2023-11-29 04:37:57,147 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:37:57,149 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:37:57,249 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0
[2023-11-29 04:37:57,349 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34
[2023-11-29 04:37:57,350 INFO  L420      AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:37:57,350 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:37:57,351 INFO  L85        PathProgramCache]: Analyzing trace with hash -396137629, now seen corresponding path program 1 times
[2023-11-29 04:37:57,351 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:37:57,351 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302392123]
[2023-11-29 04:37:57,352 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:37:57,352 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:37:57,967 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:37:57,967 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097215352]
[2023-11-29 04:37:57,968 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:37:57,968 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:37:57,968 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:37:57,969 INFO  L229       MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:37:57,970 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process
[2023-11-29 04:38:07,896 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:38:08,149 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39744 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:38:08,244 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:38:09,134 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 42 proven. 741 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2023-11-29 04:38:09,134 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:38:09,322 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked.
[2023-11-29 04:38:09,322 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:38:09,322 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302392123]
[2023-11-29 04:38:09,322 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:38:09,322 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097215352]
[2023-11-29 04:38:09,322 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097215352] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:38:09,322 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:38:09,329 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:38:09,329 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187145436]
[2023-11-29 04:38:09,329 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:38:09,332 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:38:09,332 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:38:09,336 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:38:09,336 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:38:09,337 INFO  L87              Difference]: Start difference. First operand 13751 states and 22921 transitions. Second operand  has 5 states, 5 states have (on average 1638.4) internal successors, (8192), 5 states have internal predecessors, (8192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:38:21,441 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:38:21,441 INFO  L93              Difference]: Finished difference Result 49631 states and 82415 transitions.
[2023-11-29 04:38:21,441 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:38:21,443 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1638.4) internal successors, (8192), 5 states have internal predecessors, (8192), 0 states have call successors, (0), 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 8941
[2023-11-29 04:38:21,448 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:38:21,466 INFO  L225             Difference]: With dead ends: 49631
[2023-11-29 04:38:21,466 INFO  L226             Difference]: Without dead ends: 25976
[2023-11-29 04:38:21,475 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17881 GetRequests, 17872 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:38:21,476 INFO  L413           NwaCegarLoop]: 35465 mSDtfsCounter, 55324 mSDsluCounter, 34300 mSDsCounter, 0 mSdLazyCounter, 14176 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55324 SdHoareTripleChecker+Valid, 69765 SdHoareTripleChecker+Invalid, 15134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 14176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time
[2023-11-29 04:38:21,476 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [55324 Valid, 69765 Invalid, 15134 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [958 Valid, 14176 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time]
[2023-11-29 04:38:21,496 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25976 states.
[2023-11-29 04:38:21,620 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25976 to 13753.
[2023-11-29 04:38:21,632 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13753 states, 13752 states have (on average 1.6668848167539267) internal successors, (22923), 13752 states have internal predecessors, (22923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:38:21,647 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13753 states to 13753 states and 22923 transitions.
[2023-11-29 04:38:21,648 INFO  L78                 Accepts]: Start accepts. Automaton has 13753 states and 22923 transitions. Word has length 8941
[2023-11-29 04:38:21,652 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:38:21,652 INFO  L495      AbstractCegarLoop]: Abstraction has 13753 states and 22923 transitions.
[2023-11-29 04:38:21,653 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1638.4) internal successors, (8192), 5 states have internal predecessors, (8192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:38:21,653 INFO  L276                IsEmpty]: Start isEmpty. Operand 13753 states and 22923 transitions.
[2023-11-29 04:38:21,946 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8943
[2023-11-29 04:38:21,946 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:38:21,948 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:38:22,051 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0
[2023-11-29 04:38:22,148 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35
[2023-11-29 04:38:22,149 INFO  L420      AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:38:22,149 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:38:22,150 INFO  L85        PathProgramCache]: Analyzing trace with hash 968613737, now seen corresponding path program 1 times
[2023-11-29 04:38:22,150 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:38:22,150 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015797799]
[2023-11-29 04:38:22,151 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:38:22,151 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:38:22,769 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:38:22,770 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987030241]
[2023-11-29 04:38:22,771 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:38:22,771 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:38:22,771 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:38:22,772 INFO  L229       MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:38:22,773 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process
[2023-11-29 04:38:32,958 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:38:33,218 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39747 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:38:33,313 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:38:34,208 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 44 proven. 741 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2023-11-29 04:38:34,208 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:38:34,397 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked.
[2023-11-29 04:38:34,397 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:38:34,397 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015797799]
[2023-11-29 04:38:34,398 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:38:34,398 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987030241]
[2023-11-29 04:38:34,398 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987030241] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:38:34,398 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:38:34,402 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:38:34,402 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864474072]
[2023-11-29 04:38:34,402 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:38:34,406 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:38:34,406 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:38:34,411 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:38:34,411 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:38:34,413 INFO  L87              Difference]: Start difference. First operand 13753 states and 22923 transitions. Second operand  has 5 states, 5 states have (on average 1639.0) internal successors, (8195), 5 states have internal predecessors, (8195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:38:49,220 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:38:49,221 INFO  L93              Difference]: Finished difference Result 49639 states and 82423 transitions.
[2023-11-29 04:38:49,221 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:38:49,223 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1639.0) internal successors, (8195), 5 states have internal predecessors, (8195), 0 states have call successors, (0), 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 8942
[2023-11-29 04:38:49,228 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:38:49,249 INFO  L225             Difference]: With dead ends: 49639
[2023-11-29 04:38:49,250 INFO  L226             Difference]: Without dead ends: 25977
[2023-11-29 04:38:49,260 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17883 GetRequests, 17874 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:38:49,261 INFO  L413           NwaCegarLoop]: 35457 mSDtfsCounter, 37855 mSDsluCounter, 50813 mSDsCounter, 0 mSdLazyCounter, 18012 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37855 SdHoareTripleChecker+Valid, 86270 SdHoareTripleChecker+Invalid, 18970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 18012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time
[2023-11-29 04:38:49,261 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37855 Valid, 86270 Invalid, 18970 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 18012 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time]
[2023-11-29 04:38:49,288 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25977 states.
[2023-11-29 04:38:49,420 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25977 to 13755.
[2023-11-29 04:38:49,433 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13755 states, 13754 states have (on average 1.6667878435364258) internal successors, (22925), 13754 states have internal predecessors, (22925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:38:49,449 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13755 states to 13755 states and 22925 transitions.
[2023-11-29 04:38:49,449 INFO  L78                 Accepts]: Start accepts. Automaton has 13755 states and 22925 transitions. Word has length 8942
[2023-11-29 04:38:49,454 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:38:49,454 INFO  L495      AbstractCegarLoop]: Abstraction has 13755 states and 22925 transitions.
[2023-11-29 04:38:49,455 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1639.0) internal successors, (8195), 5 states have internal predecessors, (8195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:38:49,456 INFO  L276                IsEmpty]: Start isEmpty. Operand 13755 states and 22925 transitions.
[2023-11-29 04:38:49,785 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8944
[2023-11-29 04:38:49,785 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:38:49,787 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:38:49,903 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0
[2023-11-29 04:38:49,987 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36
[2023-11-29 04:38:49,988 INFO  L420      AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:38:49,988 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:38:49,989 INFO  L85        PathProgramCache]: Analyzing trace with hash -48239425, now seen corresponding path program 1 times
[2023-11-29 04:38:49,989 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:38:49,989 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229120399]
[2023-11-29 04:38:49,990 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:38:49,990 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:38:50,632 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:38:50,632 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844257030]
[2023-11-29 04:38:50,634 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:38:50,634 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:38:50,634 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:38:50,635 INFO  L229       MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:38:50,635 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process
[2023-11-29 04:39:02,279 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:39:02,644 INFO  L262         TraceCheckSpWp]: Trace formula consists of 39751 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 04:39:02,778 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:39:03,874 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 46 proven. 741 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2023-11-29 04:39:03,875 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:39:04,060 INFO  L134       CoverageAnalysis]: Checked inductivity of 792 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 746 trivial. 0 not checked.
[2023-11-29 04:39:04,061 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:39:04,061 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229120399]
[2023-11-29 04:39:04,061 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:39:04,061 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844257030]
[2023-11-29 04:39:04,061 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [844257030] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:39:04,061 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:39:04,067 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 04:39:04,067 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97549438]
[2023-11-29 04:39:04,067 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:39:04,071 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:39:04,071 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:39:04,075 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:39:04,075 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:39:04,077 INFO  L87              Difference]: Start difference. First operand 13755 states and 22925 transitions. Second operand  has 5 states, 5 states have (on average 1639.6) internal successors, (8198), 5 states have internal predecessors, (8198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:39:18,509 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:39:18,509 INFO  L93              Difference]: Finished difference Result 49647 states and 82431 transitions.
[2023-11-29 04:39:18,509 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:39:18,510 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1639.6) internal successors, (8198), 5 states have internal predecessors, (8198), 0 states have call successors, (0), 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 8943
[2023-11-29 04:39:18,516 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:39:18,537 INFO  L225             Difference]: With dead ends: 49647
[2023-11-29 04:39:18,537 INFO  L226             Difference]: Without dead ends: 25978
[2023-11-29 04:39:18,550 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17885 GetRequests, 17876 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 04:39:18,551 INFO  L413           NwaCegarLoop]: 35449 mSDtfsCounter, 37829 mSDsluCounter, 51815 mSDsCounter, 0 mSdLazyCounter, 19416 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37829 SdHoareTripleChecker+Valid, 87264 SdHoareTripleChecker+Invalid, 20374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 19416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time
[2023-11-29 04:39:18,551 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37829 Valid, 87264 Invalid, 20374 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [958 Valid, 19416 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time]
[2023-11-29 04:39:18,576 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25978 states.
[2023-11-29 04:39:18,710 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25978 to 13757.
[2023-11-29 04:39:18,721 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13757 states, 13756 states have (on average 1.6666908985170108) internal successors, (22927), 13756 states have internal predecessors, (22927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:39:18,736 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13757 states to 13757 states and 22927 transitions.
[2023-11-29 04:39:18,736 INFO  L78                 Accepts]: Start accepts. Automaton has 13757 states and 22927 transitions. Word has length 8943
[2023-11-29 04:39:18,740 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:39:18,741 INFO  L495      AbstractCegarLoop]: Abstraction has 13757 states and 22927 transitions.
[2023-11-29 04:39:18,742 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1639.6) internal successors, (8198), 5 states have internal predecessors, (8198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 04:39:18,742 INFO  L276                IsEmpty]: Start isEmpty. Operand 13757 states and 22927 transitions.
[2023-11-29 04:39:19,034 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8945
[2023-11-29 04:39:19,034 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:39:19,036 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 04:39:19,137 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0
[2023-11-29 04:39:19,236 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37
[2023-11-29 04:39:19,236 INFO  L420      AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:39:19,237 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:39:19,237 INFO  L85        PathProgramCache]: Analyzing trace with hash -1954956783, now seen corresponding path program 1 times
[2023-11-29 04:39:19,238 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:39:19,238 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133860671]
[2023-11-29 04:39:19,238 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:39:19,238 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:39:19,884 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:39:19,884 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956129712]
[2023-11-29 04:39:19,886 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:39:19,886 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:39:19,886 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:39:19,887 INFO  L229       MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:39:19,888 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_361d48bd-35d8-4ba3-8eba-7a3bed21b056/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process