./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.2.prop6-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/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_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.2.prop6-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/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_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/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 32781cad35fca72aeea4c48efae561604a8ad8d54f77104e3d8ce2fe3cee5a97
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-29 00:55:29,909 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-29 00:55:29,990 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-29 00:55:29,995 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-29 00:55:29,996 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-29 00:55:30,023 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-29 00:55:30,024 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-29 00:55:30,025 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-29 00:55:30,026 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-29 00:55:30,027 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-29 00:55:30,027 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-29 00:55:30,028 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-29 00:55:30,029 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-29 00:55:30,030 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-29 00:55:30,030 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-29 00:55:30,031 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-29 00:55:30,031 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-29 00:55:30,032 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-29 00:55:30,033 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-29 00:55:30,033 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-29 00:55:30,034 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-29 00:55:30,035 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-29 00:55:30,036 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-29 00:55:30,037 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-29 00:55:30,037 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-29 00:55:30,038 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-29 00:55:30,039 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-29 00:55:30,039 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-29 00:55:30,040 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 00:55:30,040 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-29 00:55:30,041 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-29 00:55:30,041 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-29 00:55:30,042 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-29 00:55:30,042 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-29 00:55:30,051 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-29 00:55:30,051 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-29 00:55:30,052 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-29 00:55:30,052 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-29 00:55:30,052 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-29 00:55:30,053 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_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/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_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/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 -> 32781cad35fca72aeea4c48efae561604a8ad8d54f77104e3d8ce2fe3cee5a97
[2023-11-29 00:55:30,299 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-29 00:55:30,321 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-29 00:55:30,324 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-29 00:55:30,325 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-29 00:55:30,326 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-29 00:55:30,327 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.2.prop6-back-serstep.c
[2023-11-29 00:55:33,622 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-29 00:55:34,226 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-29 00:55:34,227 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.2.prop6-back-serstep.c
[2023-11-29 00:55:34,329 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/data/5d62289ef/24c2ec0486e24f658dd7646964ba9b47/FLAG2791243ef
[2023-11-29 00:55:34,346 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/data/5d62289ef/24c2ec0486e24f658dd7646964ba9b47
[2023-11-29 00:55:34,349 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-29 00:55:34,351 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-29 00:55:34,352 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-29 00:55:34,353 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-29 00:55:34,358 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-29 00:55:34,359 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:55:34" (1/1) ...
[2023-11-29 00:55:34,360 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dd32801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:34, skipping insertion in model container
[2023-11-29 00:55:34,361 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:55:34" (1/1) ...
[2023-11-29 00:55:34,630 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-29 00:55:34,986 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_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.2.prop6-back-serstep.c[1180,1193]
[2023-11-29 00:55:36,630 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 00:55:36,643 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-29 00:55:36,657 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_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.2.prop6-back-serstep.c[1180,1193]
[2023-11-29 00:55:37,891 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 00:55:37,909 INFO  L206         MainTranslator]: Completed translation
[2023-11-29 00:55:37,909 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:37 WrapperNode
[2023-11-29 00:55:37,910 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-29 00:55:37,911 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-29 00:55:37,911 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-29 00:55:37,911 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-29 00:55:37,920 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:37" (1/1) ...
[2023-11-29 00:55:38,234 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:37" (1/1) ...
[2023-11-29 00:55:42,312 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55700
[2023-11-29 00:55:42,312 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-29 00:55:42,313 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-29 00:55:42,313 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-29 00:55:42,313 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-29 00:55:42,324 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:37" (1/1) ...
[2023-11-29 00:55:42,324 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:37" (1/1) ...
[2023-11-29 00:55:43,539 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:37" (1/1) ...
[2023-11-29 00:55:44,117 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 00:55:44,117 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:37" (1/1) ...
[2023-11-29 00:55:44,117 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:37" (1/1) ...
[2023-11-29 00:55:45,026 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:37" (1/1) ...
[2023-11-29 00:55:45,551 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:37" (1/1) ...
[2023-11-29 00:55:45,791 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:37" (1/1) ...
[2023-11-29 00:55:45,949 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:37" (1/1) ...
[2023-11-29 00:55:46,700 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-29 00:55:46,701 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-29 00:55:46,701 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-29 00:55:46,702 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-29 00:55:46,702 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:37" (1/1) ...
[2023-11-29 00:55:46,708 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 00:55:46,720 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:55:46,738 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-29 00:55:46,741 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-29 00:55:46,771 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-29 00:55:46,771 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-29 00:55:46,771 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-29 00:55:46,771 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-29 00:55:48,853 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-29 00:55:48,855 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-29 00:56:18,255 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-29 00:56:18,913 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-29 00:56:18,913 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-29 00:56:18,919 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:56:18 BoogieIcfgContainer
[2023-11-29 00:56:18,920 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-29 00:56:18,923 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-29 00:56:18,923 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-29 00:56:18,927 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-29 00:56:18,927 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:55:34" (1/3) ...
[2023-11-29 00:56:18,928 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d09dd8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:56:18, skipping insertion in model container
[2023-11-29 00:56:18,928 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:55:37" (2/3) ...
[2023-11-29 00:56:18,929 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d09dd8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:56:18, skipping insertion in model container
[2023-11-29 00:56:18,929 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:56:18" (3/3) ...
[2023-11-29 00:56:18,930 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.pgm_protocol.2.prop6-back-serstep.c
[2023-11-29 00:56:18,951 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-29 00:56:18,952 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-29 00:56:19,208 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-29 00:56:19,215 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;@338e830e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-29 00:56:19,216 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-29 00:56:19,257 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12052 states, 12050 states have (on average 1.6668879668049792) internal successors, (20086), 12051 states have internal predecessors, (20086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:56:19,511 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1255
[2023-11-29 00:56:19,512 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:56:19,514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:56:19,514 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:56:19,524 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:56:19,525 INFO  L85        PathProgramCache]: Analyzing trace with hash 513727700, now seen corresponding path program 1 times
[2023-11-29 00:56:19,535 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:56:19,535 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418720984]
[2023-11-29 00:56:19,536 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:56:19,536 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:56:20,722 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:56:25,438 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 00:56:25,438 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:56:25,439 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418720984]
[2023-11-29 00:56:25,439 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418720984] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 00:56:25,439 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 00:56:25,440 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 00:56:25,442 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523699739]
[2023-11-29 00:56:25,443 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:56:25,451 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 00:56:25,451 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:56:25,488 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 00:56:25,488 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 00:56:25,518 INFO  L87              Difference]: Start difference. First operand  has 12052 states, 12050 states have (on average 1.6668879668049792) internal successors, (20086), 12051 states have internal predecessors, (20086), 0 states have call successors, (0), 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 313.5) internal successors, (1254), 4 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:56:26,281 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:56:26,282 INFO  L93              Difference]: Finished difference Result 23581 states and 39303 transitions.
[2023-11-29 00:56:26,283 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 00:56:26,286 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 313.5) internal successors, (1254), 4 states have internal predecessors, (1254), 0 states have call successors, (0), 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 1254
[2023-11-29 00:56:26,294 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:56:26,379 INFO  L225             Difference]: With dead ends: 23581
[2023-11-29 00:56:26,379 INFO  L226             Difference]: Without dead ends: 12052
[2023-11-29 00:56:26,399 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 00:56:26,403 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 1 mSDsluCounter, 40153 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60232 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 00:56:26,404 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60232 Invalid, 13 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 00:56:26,453 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12052 states.
[2023-11-29 00:56:26,738 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12052 to 12052.
[2023-11-29 00:56:26,765 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12052 states, 12051 states have (on average 1.6665836860011618) internal successors, (20084), 12051 states have internal predecessors, (20084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:56:26,821 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12052 states to 12052 states and 20084 transitions.
[2023-11-29 00:56:26,822 INFO  L78                 Accepts]: Start accepts. Automaton has 12052 states and 20084 transitions. Word has length 1254
[2023-11-29 00:56:26,825 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:56:26,825 INFO  L495      AbstractCegarLoop]: Abstraction has 12052 states and 20084 transitions.
[2023-11-29 00:56:26,827 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 313.5) internal successors, (1254), 4 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:56:26,827 INFO  L276                IsEmpty]: Start isEmpty. Operand 12052 states and 20084 transitions.
[2023-11-29 00:56:26,900 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1256
[2023-11-29 00:56:26,900 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:56:26,902 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:56:26,902 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-29 00:56:26,902 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:56:26,903 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:56:26,904 INFO  L85        PathProgramCache]: Analyzing trace with hash -1252578036, now seen corresponding path program 1 times
[2023-11-29 00:56:26,904 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:56:26,905 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913045402]
[2023-11-29 00:56:26,905 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:56:26,906 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:56:27,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:56:29,730 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 00:56:29,730 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:56:29,730 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913045402]
[2023-11-29 00:56:29,731 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913045402] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 00:56:29,731 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 00:56:29,731 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 00:56:29,731 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449384466]
[2023-11-29 00:56:29,732 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:56:29,735 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 00:56:29,736 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:56:29,737 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 00:56:29,738 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 00:56:29,738 INFO  L87              Difference]: Start difference. First operand 12052 states and 20084 transitions. Second operand  has 4 states, 4 states have (on average 313.75) internal successors, (1255), 4 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:56:30,160 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:56:30,161 INFO  L93              Difference]: Finished difference Result 23584 states and 39301 transitions.
[2023-11-29 00:56:30,161 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 00:56:30,162 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 313.75) internal successors, (1255), 4 states have internal predecessors, (1255), 0 states have call successors, (0), 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 1255
[2023-11-29 00:56:30,165 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:56:30,220 INFO  L225             Difference]: With dead ends: 23584
[2023-11-29 00:56:30,221 INFO  L226             Difference]: Without dead ends: 12055
[2023-11-29 00:56:30,233 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 00:56:30,234 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 1 mSDsluCounter, 40151 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60230 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 00:56:30,234 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60230 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 00:56:30,256 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12055 states.
[2023-11-29 00:56:30,423 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12055 to 12054.
[2023-11-29 00:56:30,438 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12054 states, 12053 states have (on average 1.6664730772421803) internal successors, (20086), 12053 states have internal predecessors, (20086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:56:30,464 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12054 states to 12054 states and 20086 transitions.
[2023-11-29 00:56:30,464 INFO  L78                 Accepts]: Start accepts. Automaton has 12054 states and 20086 transitions. Word has length 1255
[2023-11-29 00:56:30,466 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:56:30,466 INFO  L495      AbstractCegarLoop]: Abstraction has 12054 states and 20086 transitions.
[2023-11-29 00:56:30,467 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 313.75) internal successors, (1255), 4 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:56:30,467 INFO  L276                IsEmpty]: Start isEmpty. Operand 12054 states and 20086 transitions.
[2023-11-29 00:56:30,480 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1257
[2023-11-29 00:56:30,480 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:56:30,481 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:56:30,481 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-29 00:56:30,482 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:56:30,482 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:56:30,483 INFO  L85        PathProgramCache]: Analyzing trace with hash -385638418, now seen corresponding path program 1 times
[2023-11-29 00:56:30,483 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:56:30,484 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537306790]
[2023-11-29 00:56:30,484 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:56:30,485 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:56:31,027 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:56:33,275 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 00:56:33,275 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:56:33,276 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537306790]
[2023-11-29 00:56:33,276 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537306790] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 00:56:33,276 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 00:56:33,277 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 00:56:33,277 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132679625]
[2023-11-29 00:56:33,277 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:56:33,279 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:56:33,279 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:56:33,281 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:56:33,282 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-29 00:56:33,282 INFO  L87              Difference]: Start difference. First operand 12054 states and 20086 transitions. Second operand  has 5 states, 5 states have (on average 251.2) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:56:33,969 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:56:33,969 INFO  L93              Difference]: Finished difference Result 36456 states and 60751 transitions.
[2023-11-29 00:56:33,969 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:56:33,970 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 251.2) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 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 1256
[2023-11-29 00:56:33,973 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:56:34,016 INFO  L225             Difference]: With dead ends: 36456
[2023-11-29 00:56:34,017 INFO  L226             Difference]: Without dead ends: 24925
[2023-11-29 00:56:34,033 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 00:56:34,035 INFO  L413           NwaCegarLoop]: 22323 mSDtfsCounter, 78689 mSDsluCounter, 40152 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78689 SdHoareTripleChecker+Valid, 62475 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 00:56:34,036 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [78689 Valid, 62475 Invalid, 16 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 00:56:34,068 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24925 states.
[2023-11-29 00:56:34,287 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24925 to 13403.
[2023-11-29 00:56:34,304 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13403 states, 13402 states have (on average 1.666393075660349) internal successors, (22333), 13402 states have internal predecessors, (22333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:56:34,326 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13403 states to 13403 states and 22333 transitions.
[2023-11-29 00:56:34,326 INFO  L78                 Accepts]: Start accepts. Automaton has 13403 states and 22333 transitions. Word has length 1256
[2023-11-29 00:56:34,328 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:56:34,328 INFO  L495      AbstractCegarLoop]: Abstraction has 13403 states and 22333 transitions.
[2023-11-29 00:56:34,329 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 251.2) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:56:34,329 INFO  L276                IsEmpty]: Start isEmpty. Operand 13403 states and 22333 transitions.
[2023-11-29 00:56:34,743 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8928
[2023-11-29 00:56:34,743 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:56:34,750 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]
[2023-11-29 00:56:34,750 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-29 00:56:34,750 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:56:34,751 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:56:34,756 INFO  L85        PathProgramCache]: Analyzing trace with hash 1173782582, now seen corresponding path program 1 times
[2023-11-29 00:56:34,756 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:56:34,756 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162669888]
[2023-11-29 00:56:34,758 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:56:34,759 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:56:36,091 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:56:36,092 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45952655]
[2023-11-29 00:56:36,095 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:56:36,095 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:56:36,095 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:56:36,099 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:56:36,100 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-29 00:56:50,050 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:56:50,390 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44668 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 00:56:50,604 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:56:50,936 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 904 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 00:56:50,936 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 00:56:50,936 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:56:50,937 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162669888]
[2023-11-29 00:56:50,937 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:56:50,937 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45952655]
[2023-11-29 00:56:50,937 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [45952655] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 00:56:50,937 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 00:56:50,941 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 00:56:50,941 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628316099]
[2023-11-29 00:56:50,941 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:56:50,952 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 00:56:50,952 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:56:50,961 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 00:56:50,961 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 00:56:50,964 INFO  L87              Difference]: Start difference. First operand 13403 states and 22333 transitions. Second operand  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:56:51,501 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:56:51,502 INFO  L93              Difference]: Finished difference Result 24944 states and 41564 transitions.
[2023-11-29 00:56:51,502 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 00:56:51,505 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 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 00:56:51,511 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:56:51,557 INFO  L225             Difference]: With dead ends: 24944
[2023-11-29 00:56:51,557 INFO  L226             Difference]: Without dead ends: 13413
[2023-11-29 00:56:51,571 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8926 GetRequests, 8924 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 00:56:51,572 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 12 mSDsluCounter, 40148 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 60227 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 00:56:51,573 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 60227 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 00:56:51,595 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13413 states.
[2023-11-29 00:56:51,795 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13413 to 13405.
[2023-11-29 00:56:51,815 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13405 states, 13404 states have (on average 1.6662936436884512) internal successors, (22335), 13404 states have internal predecessors, (22335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:56:51,841 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13405 states to 13405 states and 22335 transitions.
[2023-11-29 00:56:51,842 INFO  L78                 Accepts]: Start accepts. Automaton has 13405 states and 22335 transitions. Word has length 8927
[2023-11-29 00:56:51,849 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:56:51,849 INFO  L495      AbstractCegarLoop]: Abstraction has 13405 states and 22335 transitions.
[2023-11-29 00:56:51,852 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:56:51,853 INFO  L276                IsEmpty]: Start isEmpty. Operand 13405 states and 22335 transitions.
[2023-11-29 00:56:52,447 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8928
[2023-11-29 00:56:52,448 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:56:52,453 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]
[2023-11-29 00:56:52,582 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-29 00:56:52,653 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:56:52,654 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:56:52,654 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:56:52,658 INFO  L85        PathProgramCache]: Analyzing trace with hash -1451468924, now seen corresponding path program 1 times
[2023-11-29 00:56:52,658 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:56:52,658 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126523966]
[2023-11-29 00:56:52,659 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:56:52,660 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:56:53,802 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:56:53,802 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52780808]
[2023-11-29 00:56:53,804 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:56:53,804 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:56:53,804 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:56:53,805 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:56:53,807 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-29 00:57:07,547 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:57:07,829 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44669 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 00:57:07,957 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:57:08,171 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 904 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 00:57:08,171 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 00:57:08,171 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:57:08,171 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126523966]
[2023-11-29 00:57:08,171 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:57:08,171 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52780808]
[2023-11-29 00:57:08,171 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [52780808] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 00:57:08,171 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 00:57:08,174 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 00:57:08,175 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778235154]
[2023-11-29 00:57:08,175 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:57:08,184 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 00:57:08,184 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:57:08,190 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 00:57:08,190 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 00:57:08,193 INFO  L87              Difference]: Start difference. First operand 13405 states and 22335 transitions. Second operand  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:57:08,475 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:57:08,475 INFO  L93              Difference]: Finished difference Result 24947 states and 41566 transitions.
[2023-11-29 00:57:08,475 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 00:57:08,478 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 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 00:57:08,488 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:57:08,503 INFO  L225             Difference]: With dead ends: 24947
[2023-11-29 00:57:08,503 INFO  L226             Difference]: Without dead ends: 13414
[2023-11-29 00:57:08,514 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8926 GetRequests, 8924 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 00:57:08,515 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 12 mSDsluCounter, 40148 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 60227 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 00:57:08,515 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 60227 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 00:57:08,536 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13414 states.
[2023-11-29 00:57:08,678 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13414 to 13406.
[2023-11-29 00:57:08,692 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13406 states, 13405 states have (on average 1.6662439388287953) internal successors, (22336), 13405 states have internal predecessors, (22336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:57:08,720 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13406 states to 13406 states and 22336 transitions.
[2023-11-29 00:57:08,720 INFO  L78                 Accepts]: Start accepts. Automaton has 13406 states and 22336 transitions. Word has length 8927
[2023-11-29 00:57:08,728 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:57:08,728 INFO  L495      AbstractCegarLoop]: Abstraction has 13406 states and 22336 transitions.
[2023-11-29 00:57:08,731 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:57:08,731 INFO  L276                IsEmpty]: Start isEmpty. Operand 13406 states and 22336 transitions.
[2023-11-29 00:57:09,248 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8928
[2023-11-29 00:57:09,248 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:57:09,254 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]
[2023-11-29 00:57:09,390 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-29 00:57:09,454 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:57:09,455 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:57:09,455 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:57:09,459 INFO  L85        PathProgramCache]: Analyzing trace with hash 1255258578, now seen corresponding path program 1 times
[2023-11-29 00:57:09,459 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:57:09,459 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319701791]
[2023-11-29 00:57:09,462 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:57:09,462 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:57:10,599 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:57:10,599 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317129384]
[2023-11-29 00:57:10,602 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:57:10,602 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:57:10,602 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:57:10,603 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:57:10,605 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-29 00:57:24,880 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:57:25,201 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44670 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-29 00:57:25,406 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:57:26,924 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 6 proven. 671 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked.
[2023-11-29 00:57:26,925 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:57:27,290 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked.
[2023-11-29 00:57:27,291 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:57:27,291 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319701791]
[2023-11-29 00:57:27,291 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:57:27,291 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317129384]
[2023-11-29 00:57:27,291 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317129384] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:57:27,291 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:57:27,297 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-29 00:57:27,297 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102744330]
[2023-11-29 00:57:27,297 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:57:27,306 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 00:57:27,306 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:57:27,314 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 00:57:27,314 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-29 00:57:27,316 INFO  L87              Difference]: Start difference. First operand 13406 states and 22336 transitions. Second operand  has 6 states, 6 states have (on average 1338.3333333333333) internal successors, (8030), 6 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:57:59,259 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:57:59,259 INFO  L93              Difference]: Finished difference Result 58325 states and 96780 transitions.
[2023-11-29 00:57:59,259 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-29 00:57:59,261 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1338.3333333333333) internal successors, (8030), 6 states have internal predecessors, (8030), 0 states have call successors, (0), 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 00:57:59,275 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:57:59,329 INFO  L225             Difference]: With dead ends: 58325
[2023-11-29 00:57:59,329 INFO  L226             Difference]: Without dead ends: 36467
[2023-11-29 00:57:59,342 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17854 GetRequests, 17842 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182
[2023-11-29 00:57:59,343 INFO  L413           NwaCegarLoop]: 31887 mSDtfsCounter, 85173 mSDsluCounter, 77032 mSDsCounter, 0 mSdLazyCounter, 35768 mSolverCounterSat, 1208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85173 SdHoareTripleChecker+Valid, 108919 SdHoareTripleChecker+Invalid, 36976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.5s SdHoareTripleChecker+Time, 1208 IncrementalHoareTripleChecker+Valid, 35768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.4s IncrementalHoareTripleChecker+Time
[2023-11-29 00:57:59,344 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [85173 Valid, 108919 Invalid, 36976 Unknown, 0 Unchecked, 0.5s Time], IncrementalHoareTripleChecker [1208 Valid, 35768 Invalid, 0 Unknown, 0 Unchecked, 30.4s Time]
[2023-11-29 00:57:59,384 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36467 states.
[2023-11-29 00:57:59,575 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36467 to 13406.
[2023-11-29 00:57:59,587 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13406 states, 13405 states have (on average 1.6662439388287953) internal successors, (22336), 13405 states have internal predecessors, (22336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:57:59,605 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13406 states to 13406 states and 22336 transitions.
[2023-11-29 00:57:59,605 INFO  L78                 Accepts]: Start accepts. Automaton has 13406 states and 22336 transitions. Word has length 8927
[2023-11-29 00:57:59,612 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:57:59,612 INFO  L495      AbstractCegarLoop]: Abstraction has 13406 states and 22336 transitions.
[2023-11-29 00:57:59,613 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1338.3333333333333) internal successors, (8030), 6 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:57:59,614 INFO  L276                IsEmpty]: Start isEmpty. Operand 13406 states and 22336 transitions.
[2023-11-29 00:58:00,005 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8929
[2023-11-29 00:58:00,005 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:58:00,010 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 00:58:00,140 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-29 00:58:00,211 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-11-29 00:58:00,211 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:58:00,212 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:58:00,216 INFO  L85        PathProgramCache]: Analyzing trace with hash 1858224526, now seen corresponding path program 1 times
[2023-11-29 00:58:00,216 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:58:00,216 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937650025]
[2023-11-29 00:58:00,216 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:58:00,217 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:58:01,056 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:58:01,056 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482587195]
[2023-11-29 00:58:01,057 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:58:01,058 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:58:01,058 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:58:01,058 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:58:01,060 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-29 00:58:14,942 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:58:15,265 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44673 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:58:15,409 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:58:16,846 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 8 proven. 671 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked.
[2023-11-29 00:58:16,846 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:58:17,050 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked.
[2023-11-29 00:58:17,050 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:58:17,050 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937650025]
[2023-11-29 00:58:17,050 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:58:17,051 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482587195]
[2023-11-29 00:58:17,051 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482587195] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:58:17,051 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:58:17,056 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:58:17,056 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010203017]
[2023-11-29 00:58:17,057 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:58:17,066 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:58:17,066 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:58:17,077 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:58:17,077 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:58:17,080 INFO  L87              Difference]: Start difference. First operand 13406 states and 22336 transitions. Second operand  has 5 states, 5 states have (on average 1606.6) internal successors, (8033), 5 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:58:34,804 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:58:34,804 INFO  L93              Difference]: Finished difference Result 46798 states and 77571 transitions.
[2023-11-29 00:58:34,804 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:58:34,806 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1606.6) internal successors, (8033), 5 states have internal predecessors, (8033), 0 states have call successors, (0), 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 00:58:34,814 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:58:34,840 INFO  L225             Difference]: With dead ends: 46798
[2023-11-29 00:58:34,841 INFO  L226             Difference]: Without dead ends: 24935
[2023-11-29 00:58:34,847 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 00:58:34,848 INFO  L413           NwaCegarLoop]: 31877 mSDtfsCounter, 50368 mSDsluCounter, 31643 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50368 SdHoareTripleChecker+Valid, 63520 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time
[2023-11-29 00:58:34,848 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50368 Valid, 63520 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 16.8s Time]
[2023-11-29 00:58:34,868 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24935 states.
[2023-11-29 00:58:35,054 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24935 to 13408.
[2023-11-29 00:58:35,067 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13408 states, 13407 states have (on average 1.6661445513537705) internal successors, (22338), 13407 states have internal predecessors, (22338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:58:35,085 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13408 states to 13408 states and 22338 transitions.
[2023-11-29 00:58:35,085 INFO  L78                 Accepts]: Start accepts. Automaton has 13408 states and 22338 transitions. Word has length 8928
[2023-11-29 00:58:35,091 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:58:35,091 INFO  L495      AbstractCegarLoop]: Abstraction has 13408 states and 22338 transitions.
[2023-11-29 00:58:35,093 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1606.6) internal successors, (8033), 5 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:58:35,093 INFO  L276                IsEmpty]: Start isEmpty. Operand 13408 states and 22338 transitions.
[2023-11-29 00:58:35,460 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8930
[2023-11-29 00:58:35,460 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:58:35,465 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 00:58:35,607 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-29 00:58:35,666 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2023-11-29 00:58:35,667 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:58:35,667 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:58:35,671 INFO  L85        PathProgramCache]: Analyzing trace with hash -1599570194, now seen corresponding path program 1 times
[2023-11-29 00:58:35,671 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:58:35,671 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966886222]
[2023-11-29 00:58:35,672 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:58:35,672 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:58:36,688 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:58:36,688 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362781504]
[2023-11-29 00:58:36,691 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:58:36,691 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:58:36,691 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:58:36,692 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:58:36,696 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 00:58:49,729 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:58:50,010 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44677 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:58:50,200 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:58:51,351 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 10 proven. 671 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked.
[2023-11-29 00:58:51,352 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:58:51,753 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked.
[2023-11-29 00:58:51,753 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:58:51,754 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966886222]
[2023-11-29 00:58:51,754 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:58:51,754 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362781504]
[2023-11-29 00:58:51,754 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [362781504] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:58:51,754 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:58:51,762 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:58:51,762 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002675285]
[2023-11-29 00:58:51,762 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:58:51,770 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:58:51,770 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:58:51,777 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:58:51,777 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:58:51,779 INFO  L87              Difference]: Start difference. First operand 13408 states and 22338 transitions. Second operand  has 5 states, 5 states have (on average 1607.2) internal successors, (8036), 5 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:59:09,718 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:59:09,718 INFO  L93              Difference]: Finished difference Result 46806 states and 77579 transitions.
[2023-11-29 00:59:09,718 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:59:09,720 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1607.2) internal successors, (8036), 5 states have internal predecessors, (8036), 0 states have call successors, (0), 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 00:59:09,725 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:59:09,747 INFO  L225             Difference]: With dead ends: 46806
[2023-11-29 00:59:09,748 INFO  L226             Difference]: Without dead ends: 24936
[2023-11-29 00:59:09,754 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 00:59:09,755 INFO  L413           NwaCegarLoop]: 31869 mSDtfsCounter, 50359 mSDsluCounter, 31638 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50359 SdHoareTripleChecker+Valid, 63507 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time
[2023-11-29 00:59:09,755 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50359 Valid, 63507 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 17.0s Time]
[2023-11-29 00:59:09,773 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24936 states.
[2023-11-29 00:59:09,896 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24936 to 13410.
[2023-11-29 00:59:09,907 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13410 states, 13409 states have (on average 1.6660451935267357) internal successors, (22340), 13409 states have internal predecessors, (22340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:59:09,922 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13410 states to 13410 states and 22340 transitions.
[2023-11-29 00:59:09,922 INFO  L78                 Accepts]: Start accepts. Automaton has 13410 states and 22340 transitions. Word has length 8929
[2023-11-29 00:59:09,927 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:59:09,927 INFO  L495      AbstractCegarLoop]: Abstraction has 13410 states and 22340 transitions.
[2023-11-29 00:59:09,928 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1607.2) internal successors, (8036), 5 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:59:09,928 INFO  L276                IsEmpty]: Start isEmpty. Operand 13410 states and 22340 transitions.
[2023-11-29 00:59:10,297 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8931
[2023-11-29 00:59:10,298 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:59:10,301 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]
[2023-11-29 00:59:10,422 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-29 00:59:10,501 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:59:10,502 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:59:10,502 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:59:10,505 INFO  L85        PathProgramCache]: Analyzing trace with hash -667116682, now seen corresponding path program 1 times
[2023-11-29 00:59:10,505 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:59:10,505 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542062842]
[2023-11-29 00:59:10,507 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:59:10,507 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:59:11,451 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:59:11,451 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727049937]
[2023-11-29 00:59:11,453 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:59:11,454 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:59:11,454 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:59:11,455 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:59:11,457 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 00:59:24,781 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 00:59:25,131 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44680 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 00:59:25,274 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 00:59:26,786 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 12 proven. 671 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked.
[2023-11-29 00:59:26,786 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 00:59:26,984 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 892 trivial. 0 not checked.
[2023-11-29 00:59:26,984 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 00:59:26,985 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542062842]
[2023-11-29 00:59:26,985 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 00:59:26,985 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727049937]
[2023-11-29 00:59:26,985 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [727049937] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 00:59:26,985 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 00:59:26,993 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 00:59:26,993 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364200871]
[2023-11-29 00:59:26,993 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 00:59:27,001 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 00:59:27,001 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 00:59:27,008 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 00:59:27,008 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 00:59:27,011 INFO  L87              Difference]: Start difference. First operand 13410 states and 22340 transitions. Second operand  has 5 states, 5 states have (on average 1607.8) internal successors, (8039), 5 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:59:44,204 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 00:59:44,204 INFO  L93              Difference]: Finished difference Result 46814 states and 77587 transitions.
[2023-11-29 00:59:44,204 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 00:59:44,206 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1607.8) internal successors, (8039), 5 states have internal predecessors, (8039), 0 states have call successors, (0), 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 00:59:44,212 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 00:59:44,249 INFO  L225             Difference]: With dead ends: 46814
[2023-11-29 00:59:44,249 INFO  L226             Difference]: Without dead ends: 24937
[2023-11-29 00:59:44,262 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 00:59:44,263 INFO  L413           NwaCegarLoop]: 31861 mSDtfsCounter, 50354 mSDsluCounter, 31632 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50354 SdHoareTripleChecker+Valid, 63493 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time
[2023-11-29 00:59:44,263 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50354 Valid, 63493 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 16.3s Time]
[2023-11-29 00:59:44,293 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24937 states.
[2023-11-29 00:59:44,451 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24937 to 13412.
[2023-11-29 00:59:44,463 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13412 states, 13411 states have (on average 1.665945865334427) internal successors, (22342), 13411 states have internal predecessors, (22342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:59:44,480 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13412 states to 13412 states and 22342 transitions.
[2023-11-29 00:59:44,480 INFO  L78                 Accepts]: Start accepts. Automaton has 13412 states and 22342 transitions. Word has length 8930
[2023-11-29 00:59:44,485 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 00:59:44,485 INFO  L495      AbstractCegarLoop]: Abstraction has 13412 states and 22342 transitions.
[2023-11-29 00:59:44,487 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1607.8) internal successors, (8039), 5 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 00:59:44,487 INFO  L276                IsEmpty]: Start isEmpty. Operand 13412 states and 22342 transitions.
[2023-11-29 00:59:44,980 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8932
[2023-11-29 00:59:44,980 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 00:59:44,984 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]
[2023-11-29 00:59:45,131 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-29 00:59:45,184 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:59:45,185 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 00:59:45,186 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 00:59:45,189 INFO  L85        PathProgramCache]: Analyzing trace with hash -1046776568, now seen corresponding path program 1 times
[2023-11-29 00:59:45,189 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 00:59:45,190 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950764265]
[2023-11-29 00:59:45,191 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:59:45,191 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 00:59:46,190 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 00:59:46,191 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602466388]
[2023-11-29 00:59:46,192 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 00:59:46,193 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 00:59:46,193 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 00:59:46,194 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 00:59:46,195 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 00:59:59,810 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:00:00,099 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44683 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 01:00:00,218 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:00:01,755 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 14 proven. 671 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked.
[2023-11-29 01:00:01,755 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 01:00:01,960 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked.
[2023-11-29 01:00:01,960 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:00:01,960 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950764265]
[2023-11-29 01:00:01,960 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:00:01,960 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602466388]
[2023-11-29 01:00:01,960 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [602466388] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 01:00:01,961 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 01:00:01,966 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 01:00:01,966 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41956242]
[2023-11-29 01:00:01,966 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:00:01,976 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 01:00:01,976 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:00:01,984 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 01:00:01,984 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 01:00:01,987 INFO  L87              Difference]: Start difference. First operand 13412 states and 22342 transitions. Second operand  has 5 states, 5 states have (on average 1608.4) internal successors, (8042), 5 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:00:20,039 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:00:20,039 INFO  L93              Difference]: Finished difference Result 46822 states and 77595 transitions.
[2023-11-29 01:00:20,040 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 01:00:20,041 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1608.4) internal successors, (8042), 5 states have internal predecessors, (8042), 0 states have call successors, (0), 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 01:00:20,047 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:00:20,063 INFO  L225             Difference]: With dead ends: 46822
[2023-11-29 01:00:20,064 INFO  L226             Difference]: Without dead ends: 24938
[2023-11-29 01:00:20,071 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17861 GetRequests, 17852 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 01:00:20,072 INFO  L413           NwaCegarLoop]: 31853 mSDtfsCounter, 50346 mSDsluCounter, 31627 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50346 SdHoareTripleChecker+Valid, 63480 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time
[2023-11-29 01:00:20,072 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50346 Valid, 63480 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 17.1s Time]
[2023-11-29 01:00:20,091 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24938 states.
[2023-11-29 01:00:20,212 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24938 to 13414.
[2023-11-29 01:00:20,224 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13414 states, 13413 states have (on average 1.6658465667635876) internal successors, (22344), 13413 states have internal predecessors, (22344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:00:20,241 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13414 states to 13414 states and 22344 transitions.
[2023-11-29 01:00:20,241 INFO  L78                 Accepts]: Start accepts. Automaton has 13414 states and 22344 transitions. Word has length 8931
[2023-11-29 01:00:20,246 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:00:20,246 INFO  L495      AbstractCegarLoop]: Abstraction has 13414 states and 22344 transitions.
[2023-11-29 01:00:20,247 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1608.4) internal successors, (8042), 5 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:00:20,248 INFO  L276                IsEmpty]: Start isEmpty. Operand 13414 states and 22344 transitions.
[2023-11-29 01:00:20,646 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8933
[2023-11-29 01:00:20,647 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:00:20,648 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]
[2023-11-29 01:00:20,773 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-29 01:00:20,849 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-29 01:00:20,849 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:00:20,850 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:00:20,852 INFO  L85        PathProgramCache]: Analyzing trace with hash -1187112356, now seen corresponding path program 1 times
[2023-11-29 01:00:20,852 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:00:20,852 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731284134]
[2023-11-29 01:00:20,853 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:00:20,853 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:00:21,835 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:00:21,835 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789611787]
[2023-11-29 01:00:21,837 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:00:21,837 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:00:21,838 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:00:21,838 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:00:21,839 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 01:00:34,998 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:00:35,322 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44686 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 01:00:35,431 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:00:36,834 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 16 proven. 671 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked.
[2023-11-29 01:00:36,835 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 01:00:37,019 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked.
[2023-11-29 01:00:37,019 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:00:37,019 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731284134]
[2023-11-29 01:00:37,019 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:00:37,019 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789611787]
[2023-11-29 01:00:37,019 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [789611787] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 01:00:37,020 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 01:00:37,026 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 01:00:37,026 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736631202]
[2023-11-29 01:00:37,026 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:00:37,032 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 01:00:37,032 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:00:37,037 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 01:00:37,037 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 01:00:37,039 INFO  L87              Difference]: Start difference. First operand 13414 states and 22344 transitions. Second operand  has 5 states, 5 states have (on average 1609.0) internal successors, (8045), 5 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:00:57,027 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:00:57,027 INFO  L93              Difference]: Finished difference Result 46830 states and 77603 transitions.
[2023-11-29 01:00:57,027 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 01:00:57,029 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1609.0) internal successors, (8045), 5 states have internal predecessors, (8045), 0 states have call successors, (0), 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 01:00:57,036 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:00:57,057 INFO  L225             Difference]: With dead ends: 46830
[2023-11-29 01:00:57,058 INFO  L226             Difference]: Without dead ends: 24939
[2023-11-29 01:00:57,069 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 01:00:57,069 INFO  L413           NwaCegarLoop]: 31845 mSDtfsCounter, 34760 mSDsluCounter, 48224 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34760 SdHoareTripleChecker+Valid, 80069 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time
[2023-11-29 01:00:57,070 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34760 Valid, 80069 Invalid, 23700 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 19.0s Time]
[2023-11-29 01:00:57,093 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24939 states.
[2023-11-29 01:00:57,243 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24939 to 13416.
[2023-11-29 01:00:57,256 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13416 states, 13415 states have (on average 1.665747297800969) internal successors, (22346), 13415 states have internal predecessors, (22346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:00:57,278 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13416 states to 13416 states and 22346 transitions.
[2023-11-29 01:00:57,279 INFO  L78                 Accepts]: Start accepts. Automaton has 13416 states and 22346 transitions. Word has length 8932
[2023-11-29 01:00:57,283 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:00:57,283 INFO  L495      AbstractCegarLoop]: Abstraction has 13416 states and 22346 transitions.
[2023-11-29 01:00:57,285 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1609.0) internal successors, (8045), 5 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:00:57,285 INFO  L276                IsEmpty]: Start isEmpty. Operand 13416 states and 22346 transitions.
[2023-11-29 01:00:57,741 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8934
[2023-11-29 01:00:57,742 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:00:57,744 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 01:00:57,884 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-29 01:00:57,944 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:00:57,945 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:00:57,946 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:00:57,948 INFO  L85        PathProgramCache]: Analyzing trace with hash 1380082468, now seen corresponding path program 1 times
[2023-11-29 01:00:57,948 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:00:57,948 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655168839]
[2023-11-29 01:00:57,949 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:00:57,949 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:00:58,913 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:00:58,913 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942313647]
[2023-11-29 01:00:58,915 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:00:58,915 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:00:58,915 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:00:58,916 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:00:58,916 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 01:01:11,699 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:01:11,979 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44690 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 01:01:12,086 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:01:13,104 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 18 proven. 671 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked.
[2023-11-29 01:01:13,104 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 01:01:13,275 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked.
[2023-11-29 01:01:13,275 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:01:13,275 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655168839]
[2023-11-29 01:01:13,275 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:01:13,275 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942313647]
[2023-11-29 01:01:13,275 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942313647] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 01:01:13,275 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 01:01:13,281 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 01:01:13,281 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566773075]
[2023-11-29 01:01:13,281 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:01:13,285 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 01:01:13,285 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:01:13,290 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 01:01:13,290 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 01:01:13,292 INFO  L87              Difference]: Start difference. First operand 13416 states and 22346 transitions. Second operand  has 5 states, 5 states have (on average 1609.6) internal successors, (8048), 5 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:01:30,297 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:01:30,297 INFO  L93              Difference]: Finished difference Result 46838 states and 77611 transitions.
[2023-11-29 01:01:30,297 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 01:01:30,299 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1609.6) internal successors, (8048), 5 states have internal predecessors, (8048), 0 states have call successors, (0), 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 01:01:30,306 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:01:30,328 INFO  L225             Difference]: With dead ends: 46838
[2023-11-29 01:01:30,328 INFO  L226             Difference]: Without dead ends: 24940
[2023-11-29 01:01:30,341 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17865 GetRequests, 17856 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 01:01:30,342 INFO  L413           NwaCegarLoop]: 31837 mSDtfsCounter, 34754 mSDsluCounter, 48214 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34754 SdHoareTripleChecker+Valid, 80051 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time
[2023-11-29 01:01:30,342 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34754 Valid, 80051 Invalid, 23700 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 16.2s Time]
[2023-11-29 01:01:30,372 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24940 states.
[2023-11-29 01:01:30,538 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24940 to 13418.
[2023-11-29 01:01:30,550 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13418 states, 13417 states have (on average 1.6656480584333309) internal successors, (22348), 13417 states have internal predecessors, (22348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:01:30,567 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13418 states to 13418 states and 22348 transitions.
[2023-11-29 01:01:30,567 INFO  L78                 Accepts]: Start accepts. Automaton has 13418 states and 22348 transitions. Word has length 8933
[2023-11-29 01:01:30,573 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:01:30,573 INFO  L495      AbstractCegarLoop]: Abstraction has 13418 states and 22348 transitions.
[2023-11-29 01:01:30,574 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1609.6) internal successors, (8048), 5 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:01:30,574 INFO  L276                IsEmpty]: Start isEmpty. Operand 13418 states and 22348 transitions.
[2023-11-29 01:01:30,984 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8935
[2023-11-29 01:01:30,984 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:01:30,986 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 01:01:31,098 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-29 01:01:31,187 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:01:31,187 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:01:31,188 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:01:31,190 INFO  L85        PathProgramCache]: Analyzing trace with hash 1033651524, now seen corresponding path program 1 times
[2023-11-29 01:01:31,190 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:01:31,190 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368079372]
[2023-11-29 01:01:31,191 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:01:31,191 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:01:31,998 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:01:31,998 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344717564]
[2023-11-29 01:01:31,999 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:01:31,999 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:01:32,000 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:01:32,000 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:01:32,001 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 01:01:44,505 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:01:44,811 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44693 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 01:01:44,923 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:01:46,217 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 20 proven. 671 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked.
[2023-11-29 01:01:46,217 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 01:01:46,371 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked.
[2023-11-29 01:01:46,371 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:01:46,371 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368079372]
[2023-11-29 01:01:46,371 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:01:46,371 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344717564]
[2023-11-29 01:01:46,372 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344717564] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 01:01:46,372 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 01:01:46,378 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 01:01:46,378 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491178025]
[2023-11-29 01:01:46,378 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:01:46,382 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 01:01:46,382 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:01:46,386 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 01:01:46,387 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 01:01:46,389 INFO  L87              Difference]: Start difference. First operand 13418 states and 22348 transitions. Second operand  has 5 states, 5 states have (on average 1610.2) internal successors, (8051), 5 states have internal predecessors, (8051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:02:03,597 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:02:03,597 INFO  L93              Difference]: Finished difference Result 46846 states and 77619 transitions.
[2023-11-29 01:02:03,597 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 01:02:03,599 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1610.2) internal successors, (8051), 5 states have internal predecessors, (8051), 0 states have call successors, (0), 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 01:02:03,604 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:02:03,624 INFO  L225             Difference]: With dead ends: 46846
[2023-11-29 01:02:03,624 INFO  L226             Difference]: Without dead ends: 24941
[2023-11-29 01:02:03,634 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 01:02:03,634 INFO  L413           NwaCegarLoop]: 31829 mSDtfsCounter, 34748 mSDsluCounter, 48204 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34748 SdHoareTripleChecker+Valid, 80033 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time
[2023-11-29 01:02:03,634 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34748 Valid, 80033 Invalid, 23700 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 16.3s Time]
[2023-11-29 01:02:03,656 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24941 states.
[2023-11-29 01:02:03,795 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24941 to 13420.
[2023-11-29 01:02:03,807 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13420 states, 13419 states have (on average 1.6655488486474401) internal successors, (22350), 13419 states have internal predecessors, (22350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:02:03,824 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13420 states to 13420 states and 22350 transitions.
[2023-11-29 01:02:03,824 INFO  L78                 Accepts]: Start accepts. Automaton has 13420 states and 22350 transitions. Word has length 8934
[2023-11-29 01:02:03,828 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:02:03,828 INFO  L495      AbstractCegarLoop]: Abstraction has 13420 states and 22350 transitions.
[2023-11-29 01:02:03,830 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1610.2) internal successors, (8051), 5 states have internal predecessors, (8051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:02:03,830 INFO  L276                IsEmpty]: Start isEmpty. Operand 13420 states and 22350 transitions.
[2023-11-29 01:02:04,261 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8936
[2023-11-29 01:02:04,261 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:02:04,264 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]
[2023-11-29 01:02:04,394 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-29 01:02:04,464 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:02:04,465 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:02:04,465 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:02:04,469 INFO  L85        PathProgramCache]: Analyzing trace with hash -1471335106, now seen corresponding path program 1 times
[2023-11-29 01:02:04,469 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:02:04,469 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787610607]
[2023-11-29 01:02:04,472 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:02:04,472 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:02:05,637 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:02:05,637 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394843971]
[2023-11-29 01:02:05,639 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:02:05,639 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:02:05,639 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:02:05,640 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:02:05,642 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 01:02:18,032 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:02:18,373 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44696 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 01:02:18,486 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:02:19,628 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 22 proven. 671 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked.
[2023-11-29 01:02:19,628 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 01:02:19,814 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked.
[2023-11-29 01:02:19,814 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:02:19,814 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787610607]
[2023-11-29 01:02:19,815 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:02:19,815 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394843971]
[2023-11-29 01:02:19,815 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [394843971] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 01:02:19,815 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 01:02:19,820 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 01:02:19,820 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938727050]
[2023-11-29 01:02:19,820 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:02:19,825 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 01:02:19,825 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:02:19,830 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 01:02:19,831 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 01:02:19,833 INFO  L87              Difference]: Start difference. First operand 13420 states and 22350 transitions. Second operand  has 5 states, 5 states have (on average 1610.8) internal successors, (8054), 5 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:02:36,194 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:02:36,194 INFO  L93              Difference]: Finished difference Result 46854 states and 77627 transitions.
[2023-11-29 01:02:36,194 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 01:02:36,196 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1610.8) internal successors, (8054), 5 states have internal predecessors, (8054), 0 states have call successors, (0), 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 01:02:36,205 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:02:36,231 INFO  L225             Difference]: With dead ends: 46854
[2023-11-29 01:02:36,231 INFO  L226             Difference]: Without dead ends: 24942
[2023-11-29 01:02:36,247 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 01:02:36,248 INFO  L413           NwaCegarLoop]: 31821 mSDtfsCounter, 50314 mSDsluCounter, 31607 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50314 SdHoareTripleChecker+Valid, 63428 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time
[2023-11-29 01:02:36,248 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50314 Valid, 63428 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 15.5s Time]
[2023-11-29 01:02:36,276 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24942 states.
[2023-11-29 01:02:36,482 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24942 to 13422.
[2023-11-29 01:02:36,495 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13422 states, 13421 states have (on average 1.6654496684300724) internal successors, (22352), 13421 states have internal predecessors, (22352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:02:36,517 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13422 states to 13422 states and 22352 transitions.
[2023-11-29 01:02:36,517 INFO  L78                 Accepts]: Start accepts. Automaton has 13422 states and 22352 transitions. Word has length 8935
[2023-11-29 01:02:36,523 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:02:36,523 INFO  L495      AbstractCegarLoop]: Abstraction has 13422 states and 22352 transitions.
[2023-11-29 01:02:36,526 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1610.8) internal successors, (8054), 5 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:02:36,526 INFO  L276                IsEmpty]: Start isEmpty. Operand 13422 states and 22352 transitions.
[2023-11-29 01:02:37,298 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8937
[2023-11-29 01:02:37,299 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:02:37,302 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:02:37,428 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-29 01:02:37,504 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:02:37,505 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:02:37,505 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:02:37,507 INFO  L85        PathProgramCache]: Analyzing trace with hash 1321519146, now seen corresponding path program 1 times
[2023-11-29 01:02:37,507 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:02:37,508 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864191045]
[2023-11-29 01:02:37,509 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:02:37,509 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:02:38,655 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:02:38,655 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94165167]
[2023-11-29 01:02:38,657 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:02:38,657 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:02:38,657 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:02:38,658 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:02:38,659 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 01:02:52,428 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:02:52,725 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44699 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 01:02:52,839 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:02:53,943 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 24 proven. 671 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked.
[2023-11-29 01:02:53,943 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 01:02:54,114 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked.
[2023-11-29 01:02:54,114 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:02:54,115 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864191045]
[2023-11-29 01:02:54,115 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:02:54,115 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94165167]
[2023-11-29 01:02:54,115 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [94165167] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 01:02:54,115 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 01:02:54,121 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 01:02:54,122 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318018920]
[2023-11-29 01:02:54,122 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:02:54,126 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 01:02:54,127 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:02:54,131 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 01:02:54,131 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 01:02:54,134 INFO  L87              Difference]: Start difference. First operand 13422 states and 22352 transitions. Second operand  has 5 states, 5 states have (on average 1611.4) internal successors, (8057), 5 states have internal predecessors, (8057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:03:10,040 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:03:10,040 INFO  L93              Difference]: Finished difference Result 46862 states and 77635 transitions.
[2023-11-29 01:03:10,040 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 01:03:10,042 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1611.4) internal successors, (8057), 5 states have internal predecessors, (8057), 0 states have call successors, (0), 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 01:03:10,048 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:03:10,072 INFO  L225             Difference]: With dead ends: 46862
[2023-11-29 01:03:10,072 INFO  L226             Difference]: Without dead ends: 24943
[2023-11-29 01:03:10,085 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 01:03:10,086 INFO  L413           NwaCegarLoop]: 31813 mSDtfsCounter, 50306 mSDsluCounter, 31602 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50306 SdHoareTripleChecker+Valid, 63415 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time
[2023-11-29 01:03:10,086 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50306 Valid, 63415 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time]
[2023-11-29 01:03:10,110 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24943 states.
[2023-11-29 01:03:10,256 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24943 to 13424.
[2023-11-29 01:03:10,268 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13424 states, 13423 states have (on average 1.6653505177680101) internal successors, (22354), 13423 states have internal predecessors, (22354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:03:10,285 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13424 states to 13424 states and 22354 transitions.
[2023-11-29 01:03:10,285 INFO  L78                 Accepts]: Start accepts. Automaton has 13424 states and 22354 transitions. Word has length 8936
[2023-11-29 01:03:10,290 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:03:10,290 INFO  L495      AbstractCegarLoop]: Abstraction has 13424 states and 22354 transitions.
[2023-11-29 01:03:10,292 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1611.4) internal successors, (8057), 5 states have internal predecessors, (8057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:03:10,292 INFO  L276                IsEmpty]: Start isEmpty. Operand 13424 states and 22354 transitions.
[2023-11-29 01:03:10,652 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8938
[2023-11-29 01:03:10,652 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:03:10,653 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]
[2023-11-29 01:03:10,780 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-29 01:03:10,854 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:03:10,854 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:03:10,856 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:03:10,857 INFO  L85        PathProgramCache]: Analyzing trace with hash -887272358, now seen corresponding path program 1 times
[2023-11-29 01:03:10,857 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:03:10,857 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632367930]
[2023-11-29 01:03:10,858 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:03:10,858 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:03:11,711 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:03:11,711 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065274837]
[2023-11-29 01:03:11,713 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:03:11,713 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:03:11,713 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:03:11,714 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:03:11,715 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 01:03:23,599 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:03:23,902 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44703 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 01:03:24,009 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:03:25,207 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 26 proven. 671 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked.
[2023-11-29 01:03:25,207 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 01:03:25,371 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 878 trivial. 0 not checked.
[2023-11-29 01:03:25,371 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:03:25,372 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632367930]
[2023-11-29 01:03:25,372 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:03:25,372 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065274837]
[2023-11-29 01:03:25,372 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065274837] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 01:03:25,372 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 01:03:25,378 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 01:03:25,378 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576089012]
[2023-11-29 01:03:25,378 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:03:25,382 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 01:03:25,383 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:03:25,387 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 01:03:25,387 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 01:03:25,389 INFO  L87              Difference]: Start difference. First operand 13424 states and 22354 transitions. Second operand  has 5 states, 5 states have (on average 1612.0) internal successors, (8060), 5 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:03:41,019 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:03:41,019 INFO  L93              Difference]: Finished difference Result 46870 states and 77643 transitions.
[2023-11-29 01:03:41,020 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 01:03:41,021 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1612.0) internal successors, (8060), 5 states have internal predecessors, (8060), 0 states have call successors, (0), 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 01:03:41,027 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:03:41,048 INFO  L225             Difference]: With dead ends: 46870
[2023-11-29 01:03:41,048 INFO  L226             Difference]: Without dead ends: 24944
[2023-11-29 01:03:41,056 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17873 GetRequests, 17864 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 01:03:41,057 INFO  L413           NwaCegarLoop]: 31805 mSDtfsCounter, 50287 mSDsluCounter, 31598 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50287 SdHoareTripleChecker+Valid, 63403 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time
[2023-11-29 01:03:41,057 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50287 Valid, 63403 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.8s Time]
[2023-11-29 01:03:41,081 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24944 states.
[2023-11-29 01:03:41,234 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24944 to 13426.
[2023-11-29 01:03:41,247 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13426 states, 13425 states have (on average 1.6652513966480447) internal successors, (22356), 13425 states have internal predecessors, (22356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:03:41,266 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13426 states to 13426 states and 22356 transitions.
[2023-11-29 01:03:41,266 INFO  L78                 Accepts]: Start accepts. Automaton has 13426 states and 22356 transitions. Word has length 8937
[2023-11-29 01:03:41,272 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:03:41,272 INFO  L495      AbstractCegarLoop]: Abstraction has 13426 states and 22356 transitions.
[2023-11-29 01:03:41,273 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1612.0) internal successors, (8060), 5 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:03:41,273 INFO  L276                IsEmpty]: Start isEmpty. Operand 13426 states and 22356 transitions.
[2023-11-29 01:03:41,598 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8939
[2023-11-29 01:03:41,598 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:03:41,599 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 01:03:41,723 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-29 01:03:41,800 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:03:41,800 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:03:41,800 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:03:41,803 INFO  L85        PathProgramCache]: Analyzing trace with hash 5686290, now seen corresponding path program 1 times
[2023-11-29 01:03:41,803 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:03:41,803 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488686008]
[2023-11-29 01:03:41,805 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:03:41,805 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:03:42,832 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:03:42,832 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078342704]
[2023-11-29 01:03:42,836 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:03:42,836 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:03:42,836 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:03:42,837 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:03:42,838 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 01:03:55,582 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:03:55,891 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44706 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 01:03:56,007 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:03:57,301 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 28 proven. 671 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked.
[2023-11-29 01:03:57,301 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 01:03:57,525 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked.
[2023-11-29 01:03:57,525 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:03:57,525 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488686008]
[2023-11-29 01:03:57,525 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:03:57,525 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078342704]
[2023-11-29 01:03:57,525 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078342704] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 01:03:57,525 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 01:03:57,532 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-29 01:03:57,532 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281646429]
[2023-11-29 01:03:57,532 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:03:57,539 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 01:03:57,539 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:03:57,545 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 01:03:57,545 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-29 01:03:57,548 INFO  L87              Difference]: Start difference. First operand 13426 states and 22356 transitions. Second operand  has 6 states, 6 states have (on average 1343.8333333333333) internal successors, (8063), 6 states have internal predecessors, (8063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:04:27,639 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:04:27,639 INFO  L93              Difference]: Finished difference Result 58461 states and 96936 transitions.
[2023-11-29 01:04:27,639 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-29 01:04:27,641 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1343.8333333333333) internal successors, (8063), 6 states have internal predecessors, (8063), 0 states have call successors, (0), 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 01:04:27,647 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:04:27,673 INFO  L225             Difference]: With dead ends: 58461
[2023-11-29 01:04:27,674 INFO  L226             Difference]: Without dead ends: 36528
[2023-11-29 01:04:27,687 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17876 GetRequests, 17864 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182
[2023-11-29 01:04:27,687 INFO  L413           NwaCegarLoop]: 31799 mSDtfsCounter, 53943 mSDsluCounter, 91269 mSDsCounter, 0 mSdLazyCounter, 40593 mSolverCounterSat, 1207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53943 SdHoareTripleChecker+Valid, 123068 SdHoareTripleChecker+Invalid, 41800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1207 IncrementalHoareTripleChecker+Valid, 40593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.7s IncrementalHoareTripleChecker+Time
[2023-11-29 01:04:27,688 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [53943 Valid, 123068 Invalid, 41800 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1207 Valid, 40593 Invalid, 0 Unknown, 0 Unchecked, 28.7s Time]
[2023-11-29 01:04:27,715 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36528 states.
[2023-11-29 01:04:27,926 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36528 to 13428.
[2023-11-29 01:04:27,938 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13428 states, 13427 states have (on average 1.6651523050569748) internal successors, (22358), 13427 states have internal predecessors, (22358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:04:27,954 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13428 states to 13428 states and 22358 transitions.
[2023-11-29 01:04:27,955 INFO  L78                 Accepts]: Start accepts. Automaton has 13428 states and 22358 transitions. Word has length 8938
[2023-11-29 01:04:27,959 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:04:27,959 INFO  L495      AbstractCegarLoop]: Abstraction has 13428 states and 22358 transitions.
[2023-11-29 01:04:27,961 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1343.8333333333333) internal successors, (8063), 6 states have internal predecessors, (8063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:04:27,961 INFO  L276                IsEmpty]: Start isEmpty. Operand 13428 states and 22358 transitions.
[2023-11-29 01:04:28,282 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8940
[2023-11-29 01:04:28,282 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:04:28,283 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 01:04:28,414 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-29 01:04:28,484 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:04:28,484 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:04:28,485 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:04:28,486 INFO  L85        PathProgramCache]: Analyzing trace with hash 2130999924, now seen corresponding path program 1 times
[2023-11-29 01:04:28,486 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:04:28,486 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212562425]
[2023-11-29 01:04:28,486 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:04:28,487 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:04:29,302 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:04:29,303 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870209748]
[2023-11-29 01:04:29,304 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:04:29,304 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:04:29,304 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:04:29,305 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:04:29,306 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-29 01:04:41,350 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:04:41,656 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44709 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 01:04:41,762 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:04:42,793 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 30 proven. 671 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked.
[2023-11-29 01:04:42,793 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 01:04:42,992 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked.
[2023-11-29 01:04:42,992 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:04:42,992 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212562425]
[2023-11-29 01:04:42,992 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:04:42,992 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870209748]
[2023-11-29 01:04:42,992 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870209748] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 01:04:42,992 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 01:04:42,997 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 01:04:42,997 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857901819]
[2023-11-29 01:04:42,997 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:04:43,001 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 01:04:43,001 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:04:43,005 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 01:04:43,005 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 01:04:43,008 INFO  L87              Difference]: Start difference. First operand 13428 states and 22358 transitions. Second operand  has 5 states, 5 states have (on average 1613.2) internal successors, (8066), 5 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:04:58,315 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:04:58,315 INFO  L93              Difference]: Finished difference Result 46886 states and 77659 transitions.
[2023-11-29 01:04:58,316 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 01:04:58,317 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1613.2) internal successors, (8066), 5 states have internal predecessors, (8066), 0 states have call successors, (0), 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 01:04:58,323 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:04:58,344 INFO  L225             Difference]: With dead ends: 46886
[2023-11-29 01:04:58,344 INFO  L226             Difference]: Without dead ends: 24946
[2023-11-29 01:04:58,356 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17877 GetRequests, 17868 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 01:04:58,356 INFO  L413           NwaCegarLoop]: 31789 mSDtfsCounter, 50282 mSDsluCounter, 31587 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50282 SdHoareTripleChecker+Valid, 63376 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time
[2023-11-29 01:04:58,356 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50282 Valid, 63376 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time]
[2023-11-29 01:04:58,379 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24946 states.
[2023-11-29 01:04:58,525 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24946 to 13430.
[2023-11-29 01:04:58,538 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13430 states, 13429 states have (on average 1.665053242981607) internal successors, (22360), 13429 states have internal predecessors, (22360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:04:58,555 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13430 states to 13430 states and 22360 transitions.
[2023-11-29 01:04:58,555 INFO  L78                 Accepts]: Start accepts. Automaton has 13430 states and 22360 transitions. Word has length 8939
[2023-11-29 01:04:58,560 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:04:58,560 INFO  L495      AbstractCegarLoop]: Abstraction has 13430 states and 22360 transitions.
[2023-11-29 01:04:58,561 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1613.2) internal successors, (8066), 5 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:04:58,561 INFO  L276                IsEmpty]: Start isEmpty. Operand 13430 states and 22360 transitions.
[2023-11-29 01:04:59,007 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8941
[2023-11-29 01:04:59,007 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:04:59,009 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 01:04:59,136 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-29 01:04:59,209 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:04:59,210 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:04:59,211 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:04:59,212 INFO  L85        PathProgramCache]: Analyzing trace with hash 123849464, now seen corresponding path program 1 times
[2023-11-29 01:04:59,212 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:04:59,212 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072157294]
[2023-11-29 01:04:59,213 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:04:59,213 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:05:00,042 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:05:00,042 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133065056]
[2023-11-29 01:05:00,044 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:05:00,044 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:05:00,044 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:05:00,045 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:05:00,046 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-29 01:05:12,093 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:05:12,399 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44712 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 01:05:12,515 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:05:13,710 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 32 proven. 671 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked.
[2023-11-29 01:05:13,710 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 01:05:13,884 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked.
[2023-11-29 01:05:13,884 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:05:13,884 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072157294]
[2023-11-29 01:05:13,884 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:05:13,884 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133065056]
[2023-11-29 01:05:13,884 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133065056] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 01:05:13,884 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 01:05:13,890 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 01:05:13,891 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849772256]
[2023-11-29 01:05:13,891 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:05:13,895 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 01:05:13,895 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:05:13,898 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 01:05:13,898 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 01:05:13,900 INFO  L87              Difference]: Start difference. First operand 13430 states and 22360 transitions. Second operand  has 5 states, 5 states have (on average 1613.8) internal successors, (8069), 5 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:05:31,512 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:05:31,512 INFO  L93              Difference]: Finished difference Result 46894 states and 77667 transitions.
[2023-11-29 01:05:31,512 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 01:05:31,514 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1613.8) internal successors, (8069), 5 states have internal predecessors, (8069), 0 states have call successors, (0), 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 01:05:31,519 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:05:31,535 INFO  L225             Difference]: With dead ends: 46894
[2023-11-29 01:05:31,535 INFO  L226             Difference]: Without dead ends: 24947
[2023-11-29 01:05:31,543 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17879 GetRequests, 17870 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 01:05:31,544 INFO  L413           NwaCegarLoop]: 31781 mSDtfsCounter, 34712 mSDsluCounter, 48144 mSDsCounter, 0 mSdLazyCounter, 22495 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34712 SdHoareTripleChecker+Valid, 79925 SdHoareTripleChecker+Invalid, 23700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 22495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time
[2023-11-29 01:05:31,544 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34712 Valid, 79925 Invalid, 23700 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1205 Valid, 22495 Invalid, 0 Unknown, 0 Unchecked, 16.7s Time]
[2023-11-29 01:05:31,564 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24947 states.
[2023-11-29 01:05:31,686 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24947 to 13432.
[2023-11-29 01:05:31,697 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13432 states, 13431 states have (on average 1.6649542104087558) internal successors, (22362), 13431 states have internal predecessors, (22362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:05:31,713 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13432 states to 13432 states and 22362 transitions.
[2023-11-29 01:05:31,713 INFO  L78                 Accepts]: Start accepts. Automaton has 13432 states and 22362 transitions. Word has length 8940
[2023-11-29 01:05:31,718 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:05:31,718 INFO  L495      AbstractCegarLoop]: Abstraction has 13432 states and 22362 transitions.
[2023-11-29 01:05:31,720 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1613.8) internal successors, (8069), 5 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:05:31,720 INFO  L276                IsEmpty]: Start isEmpty. Operand 13432 states and 22362 transitions.
[2023-11-29 01:05:32,039 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8942
[2023-11-29 01:05:32,039 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:05:32,040 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]
[2023-11-29 01:05:32,188 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-29 01:05:32,241 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:05:32,242 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:05:32,242 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:05:32,243 INFO  L85        PathProgramCache]: Analyzing trace with hash 43432592, now seen corresponding path program 1 times
[2023-11-29 01:05:32,243 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:05:32,244 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174100720]
[2023-11-29 01:05:32,245 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:05:32,245 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:05:33,116 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:05:33,116 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535599603]
[2023-11-29 01:05:33,117 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:05:33,117 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:05:33,118 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:05:33,118 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:05:33,119 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-29 01:05:44,751 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:05:45,063 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44716 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 01:05:45,171 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:05:46,276 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 34 proven. 671 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked.
[2023-11-29 01:05:46,276 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 01:05:46,460 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked.
[2023-11-29 01:05:46,460 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:05:46,460 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174100720]
[2023-11-29 01:05:46,460 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:05:46,460 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535599603]
[2023-11-29 01:05:46,460 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535599603] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 01:05:46,460 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 01:05:46,465 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 01:05:46,465 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104773770]
[2023-11-29 01:05:46,465 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:05:46,469 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 01:05:46,470 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:05:46,473 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 01:05:46,474 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 01:05:46,476 INFO  L87              Difference]: Start difference. First operand 13432 states and 22362 transitions. Second operand  has 5 states, 5 states have (on average 1614.4) internal successors, (8072), 5 states have internal predecessors, (8072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:06:03,616 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:06:03,616 INFO  L93              Difference]: Finished difference Result 46902 states and 77675 transitions.
[2023-11-29 01:06:03,616 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 01:06:03,618 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1614.4) internal successors, (8072), 5 states have internal predecessors, (8072), 0 states have call successors, (0), 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 01:06:03,625 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:06:03,647 INFO  L225             Difference]: With dead ends: 46902
[2023-11-29 01:06:03,647 INFO  L226             Difference]: Without dead ends: 24948
[2023-11-29 01:06:03,661 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17881 GetRequests, 17872 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 01:06:03,661 INFO  L413           NwaCegarLoop]: 31773 mSDtfsCounter, 34721 mSDsluCounter, 45914 mSDsCounter, 0 mSdLazyCounter, 21619 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34721 SdHoareTripleChecker+Valid, 77687 SdHoareTripleChecker+Invalid, 22824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 21619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time
[2023-11-29 01:06:03,661 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34721 Valid, 77687 Invalid, 22824 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 21619 Invalid, 0 Unknown, 0 Unchecked, 16.3s Time]
[2023-11-29 01:06:03,683 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24948 states.
[2023-11-29 01:06:03,819 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24948 to 13434.
[2023-11-29 01:06:03,831 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13434 states, 13433 states have (on average 1.6648552073252438) internal successors, (22364), 13433 states have internal predecessors, (22364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:06:03,847 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13434 states to 13434 states and 22364 transitions.
[2023-11-29 01:06:03,848 INFO  L78                 Accepts]: Start accepts. Automaton has 13434 states and 22364 transitions. Word has length 8941
[2023-11-29 01:06:03,852 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:06:03,852 INFO  L495      AbstractCegarLoop]: Abstraction has 13434 states and 22364 transitions.
[2023-11-29 01:06:03,854 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1614.4) internal successors, (8072), 5 states have internal predecessors, (8072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:06:03,854 INFO  L276                IsEmpty]: Start isEmpty. Operand 13434 states and 22364 transitions.
[2023-11-29 01:06:04,255 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8943
[2023-11-29 01:06:04,255 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:06:04,256 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]
[2023-11-29 01:06:04,386 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-29 01:06:04,457 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:06:04,457 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:06:04,459 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:06:04,460 INFO  L85        PathProgramCache]: Analyzing trace with hash -474507296, now seen corresponding path program 1 times
[2023-11-29 01:06:04,460 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:06:04,460 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039851110]
[2023-11-29 01:06:04,461 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:06:04,461 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:06:05,296 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:06:05,296 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891296309]
[2023-11-29 01:06:05,298 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:06:05,298 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:06:05,298 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:06:05,299 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:06:05,300 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-29 01:06:17,764 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:06:18,059 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44719 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 01:06:18,174 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:06:19,245 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 36 proven. 671 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked.
[2023-11-29 01:06:19,245 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 01:06:19,446 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked.
[2023-11-29 01:06:19,446 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:06:19,446 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039851110]
[2023-11-29 01:06:19,446 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:06:19,446 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891296309]
[2023-11-29 01:06:19,446 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891296309] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 01:06:19,446 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 01:06:19,452 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 01:06:19,452 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685085810]
[2023-11-29 01:06:19,452 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:06:19,457 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 01:06:19,457 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:06:19,461 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 01:06:19,461 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 01:06:19,463 INFO  L87              Difference]: Start difference. First operand 13434 states and 22364 transitions. Second operand  has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:06:34,828 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:06:34,828 INFO  L93              Difference]: Finished difference Result 46910 states and 77683 transitions.
[2023-11-29 01:06:34,828 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 01:06:34,830 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 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 01:06:34,835 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:06:34,854 INFO  L225             Difference]: With dead ends: 46910
[2023-11-29 01:06:34,854 INFO  L226             Difference]: Without dead ends: 24949
[2023-11-29 01:06:34,863 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 01:06:34,864 INFO  L413           NwaCegarLoop]: 31765 mSDtfsCounter, 50242 mSDsluCounter, 31573 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50242 SdHoareTripleChecker+Valid, 63338 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time
[2023-11-29 01:06:34,864 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50242 Valid, 63338 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time]
[2023-11-29 01:06:34,885 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24949 states.
[2023-11-29 01:06:35,020 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24949 to 13436.
[2023-11-29 01:06:35,032 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13436 states, 13435 states have (on average 1.664756233717901) internal successors, (22366), 13435 states have internal predecessors, (22366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:06:35,048 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13436 states to 13436 states and 22366 transitions.
[2023-11-29 01:06:35,049 INFO  L78                 Accepts]: Start accepts. Automaton has 13436 states and 22366 transitions. Word has length 8942
[2023-11-29 01:06:35,053 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:06:35,053 INFO  L495      AbstractCegarLoop]: Abstraction has 13436 states and 22366 transitions.
[2023-11-29 01:06:35,055 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:06:35,055 INFO  L276                IsEmpty]: Start isEmpty. Operand 13436 states and 22366 transitions.
[2023-11-29 01:06:35,382 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8944
[2023-11-29 01:06:35,383 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:06:35,384 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]
[2023-11-29 01:06:35,508 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-29 01:06:35,585 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:06:35,585 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:06:35,585 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:06:35,587 INFO  L85        PathProgramCache]: Analyzing trace with hash 1058981034, now seen corresponding path program 1 times
[2023-11-29 01:06:35,587 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:06:35,587 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420141925]
[2023-11-29 01:06:35,588 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:06:35,588 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:06:36,621 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:06:36,622 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420350842]
[2023-11-29 01:06:36,623 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:06:36,624 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:06:36,624 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:06:36,625 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:06:36,628 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-29 01:06:49,209 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:06:49,511 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44722 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 01:06:49,623 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:06:50,636 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 38 proven. 671 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked.
[2023-11-29 01:06:50,636 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 01:06:50,817 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked.
[2023-11-29 01:06:50,818 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:06:50,818 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420141925]
[2023-11-29 01:06:50,818 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:06:50,818 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420350842]
[2023-11-29 01:06:50,818 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [420350842] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 01:06:50,818 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 01:06:50,823 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 01:06:50,823 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702853508]
[2023-11-29 01:06:50,823 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:06:50,827 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 01:06:50,827 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:06:50,830 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 01:06:50,830 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 01:06:50,832 INFO  L87              Difference]: Start difference. First operand 13436 states and 22366 transitions. Second operand  has 5 states, 5 states have (on average 1615.6) internal successors, (8078), 5 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:07:08,070 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:07:08,071 INFO  L93              Difference]: Finished difference Result 46918 states and 77691 transitions.
[2023-11-29 01:07:08,071 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 01:07:08,073 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1615.6) internal successors, (8078), 5 states have internal predecessors, (8078), 0 states have call successors, (0), 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 01:07:08,079 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:07:08,100 INFO  L225             Difference]: With dead ends: 46918
[2023-11-29 01:07:08,100 INFO  L226             Difference]: Without dead ends: 24950
[2023-11-29 01:07:08,113 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17885 GetRequests, 17876 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 01:07:08,114 INFO  L413           NwaCegarLoop]: 31757 mSDtfsCounter, 34711 mSDsluCounter, 45898 mSDsCounter, 0 mSdLazyCounter, 21619 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34711 SdHoareTripleChecker+Valid, 77655 SdHoareTripleChecker+Invalid, 22824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 21619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time
[2023-11-29 01:07:08,114 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34711 Valid, 77655 Invalid, 22824 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 21619 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time]
[2023-11-29 01:07:08,137 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24950 states.
[2023-11-29 01:07:08,274 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24950 to 13438.
[2023-11-29 01:07:08,286 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13438 states, 13437 states have (on average 1.6646572895735656) internal successors, (22368), 13437 states have internal predecessors, (22368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:07:08,302 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13438 states to 13438 states and 22368 transitions.
[2023-11-29 01:07:08,302 INFO  L78                 Accepts]: Start accepts. Automaton has 13438 states and 22368 transitions. Word has length 8943
[2023-11-29 01:07:08,307 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:07:08,307 INFO  L495      AbstractCegarLoop]: Abstraction has 13438 states and 22368 transitions.
[2023-11-29 01:07:08,309 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1615.6) internal successors, (8078), 5 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:07:08,309 INFO  L276                IsEmpty]: Start isEmpty. Operand 13438 states and 22368 transitions.
[2023-11-29 01:07:08,717 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8945
[2023-11-29 01:07:08,717 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:07:08,719 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]
[2023-11-29 01:07:08,841 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0
[2023-11-29 01:07:08,920 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21
[2023-11-29 01:07:08,920 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:07:08,922 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:07:08,923 INFO  L85        PathProgramCache]: Analyzing trace with hash 2086707910, now seen corresponding path program 1 times
[2023-11-29 01:07:08,923 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:07:08,923 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98846784]
[2023-11-29 01:07:08,924 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:07:08,924 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:07:09,768 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:07:09,769 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838845181]
[2023-11-29 01:07:09,770 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:07:09,770 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:07:09,770 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:07:09,771 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:07:09,772 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-29 01:07:21,825 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:07:22,136 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44725 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 01:07:22,245 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 01:07:23,423 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 40 proven. 671 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked.
[2023-11-29 01:07:23,424 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 01:07:23,614 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked.
[2023-11-29 01:07:23,614 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 01:07:23,614 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98846784]
[2023-11-29 01:07:23,614 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 01:07:23,614 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838845181]
[2023-11-29 01:07:23,614 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [838845181] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 01:07:23,614 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 01:07:23,620 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 01:07:23,620 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216145232]
[2023-11-29 01:07:23,620 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 01:07:23,624 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 01:07:23,624 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 01:07:23,627 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 01:07:23,627 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 01:07:23,629 INFO  L87              Difference]: Start difference. First operand 13438 states and 22368 transitions. Second operand  has 5 states, 5 states have (on average 1616.2) internal successors, (8081), 5 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:07:38,810 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 01:07:38,811 INFO  L93              Difference]: Finished difference Result 46926 states and 77699 transitions.
[2023-11-29 01:07:38,811 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 01:07:38,812 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1616.2) internal successors, (8081), 5 states have internal predecessors, (8081), 0 states have call successors, (0), 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 8944
[2023-11-29 01:07:38,818 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 01:07:38,833 INFO  L225             Difference]: With dead ends: 46926
[2023-11-29 01:07:38,834 INFO  L226             Difference]: Without dead ends: 24951
[2023-11-29 01:07:38,841 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17887 GetRequests, 17878 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 01:07:38,841 INFO  L413           NwaCegarLoop]: 31749 mSDtfsCounter, 50224 mSDsluCounter, 31563 mSDsCounter, 0 mSdLazyCounter, 16795 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50224 SdHoareTripleChecker+Valid, 63312 SdHoareTripleChecker+Invalid, 18000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 16795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time
[2023-11-29 01:07:38,841 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50224 Valid, 63312 Invalid, 18000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 16795 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time]
[2023-11-29 01:07:38,860 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24951 states.
[2023-11-29 01:07:38,980 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24951 to 13440.
[2023-11-29 01:07:38,991 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13440 states, 13439 states have (on average 1.6645583748790833) internal successors, (22370), 13439 states have internal predecessors, (22370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:07:39,007 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13440 states to 13440 states and 22370 transitions.
[2023-11-29 01:07:39,007 INFO  L78                 Accepts]: Start accepts. Automaton has 13440 states and 22370 transitions. Word has length 8944
[2023-11-29 01:07:39,012 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 01:07:39,012 INFO  L495      AbstractCegarLoop]: Abstraction has 13440 states and 22370 transitions.
[2023-11-29 01:07:39,013 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1616.2) internal successors, (8081), 5 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 01:07:39,013 INFO  L276                IsEmpty]: Start isEmpty. Operand 13440 states and 22370 transitions.
[2023-11-29 01:07:39,331 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8946
[2023-11-29 01:07:39,331 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 01:07:39,333 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 01:07:39,454 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0
[2023-11-29 01:07:39,533 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22
[2023-11-29 01:07:39,534 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 01:07:39,534 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 01:07:39,536 INFO  L85        PathProgramCache]: Analyzing trace with hash 692858310, now seen corresponding path program 1 times
[2023-11-29 01:07:39,536 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 01:07:39,536 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910731571]
[2023-11-29 01:07:39,537 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:07:39,537 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 01:07:40,361 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 01:07:40,361 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374106252]
[2023-11-29 01:07:40,363 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 01:07:40,363 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 01:07:40,363 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 01:07:40,364 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 01:07:40,365 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bf1431-e273-4fef-ae46-dd95d2fec3a9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-29 01:07:52,877 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 01:07:53,193 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44729 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 01:07:53,300 INFO  L285         TraceCheckSpWp]: Computing forward predicates...