./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synapse.4.prop1-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/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_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synapse.4.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/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_dc1129e2-495f-41e6-a2d9-669b91edd506/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 4b46ea9fd89320db5c56d7b3991823214e0cc5559a3eb207799b4e496bb9fb4d
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-29 03:02:09,725 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-29 03:02:09,789 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-29 03:02:09,793 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-29 03:02:09,793 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-29 03:02:09,816 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-29 03:02:09,817 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-29 03:02:09,817 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-29 03:02:09,818 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-29 03:02:09,819 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-29 03:02:09,819 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-29 03:02:09,820 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-29 03:02:09,821 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-29 03:02:09,821 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-29 03:02:09,821 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-29 03:02:09,822 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-29 03:02:09,823 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-29 03:02:09,823 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-29 03:02:09,824 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-29 03:02:09,824 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-29 03:02:09,825 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-29 03:02:09,827 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-29 03:02:09,828 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-29 03:02:09,828 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-29 03:02:09,829 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-29 03:02:09,829 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-29 03:02:09,829 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-29 03:02:09,830 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-29 03:02:09,830 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 03:02:09,831 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-29 03:02:09,831 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-29 03:02:09,831 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-29 03:02:09,832 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-29 03:02:09,832 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-29 03:02:09,832 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-29 03:02:09,832 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-29 03:02:09,832 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-29 03:02:09,833 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-29 03:02:09,833 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-29 03:02:09,833 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_dc1129e2-495f-41e6-a2d9-669b91edd506/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_dc1129e2-495f-41e6-a2d9-669b91edd506/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 -> 4b46ea9fd89320db5c56d7b3991823214e0cc5559a3eb207799b4e496bb9fb4d
[2023-11-29 03:02:10,057 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-29 03:02:10,078 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-29 03:02:10,089 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-29 03:02:10,090 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-29 03:02:10,091 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-29 03:02:10,092 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synapse.4.prop1-back-serstep.c
[2023-11-29 03:02:12,827 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-29 03:02:13,227 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-29 03:02:13,227 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synapse.4.prop1-back-serstep.c
[2023-11-29 03:02:13,270 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/data/b49359ff8/55838d1e89ac4cbca1d7b48236e425d6/FLAGe35f9354d
[2023-11-29 03:02:13,281 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/data/b49359ff8/55838d1e89ac4cbca1d7b48236e425d6
[2023-11-29 03:02:13,283 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-29 03:02:13,285 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-29 03:02:13,285 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-29 03:02:13,285 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-29 03:02:13,290 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-29 03:02:13,290 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:02:13" (1/1) ...
[2023-11-29 03:02:13,291 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18faa5aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:13, skipping insertion in model container
[2023-11-29 03:02:13,291 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:02:13" (1/1) ...
[2023-11-29 03:02:13,470 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-29 03:02:13,724 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_dc1129e2-495f-41e6-a2d9-669b91edd506/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synapse.4.prop1-back-serstep.c[1175,1188]
[2023-11-29 03:02:14,886 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 03:02:14,896 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-29 03:02:14,909 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_dc1129e2-495f-41e6-a2d9-669b91edd506/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.synapse.4.prop1-back-serstep.c[1175,1188]
[2023-11-29 03:02:15,674 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 03:02:15,687 INFO  L206         MainTranslator]: Completed translation
[2023-11-29 03:02:15,687 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:15 WrapperNode
[2023-11-29 03:02:15,687 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-29 03:02:15,688 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-29 03:02:15,688 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-29 03:02:15,689 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-29 03:02:15,694 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:15" (1/1) ...
[2023-11-29 03:02:15,930 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:15" (1/1) ...
[2023-11-29 03:02:18,677 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44928
[2023-11-29 03:02:18,677 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-29 03:02:18,678 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-29 03:02:18,678 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-29 03:02:18,678 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-29 03:02:18,690 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:15" (1/1) ...
[2023-11-29 03:02:18,690 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:15" (1/1) ...
[2023-11-29 03:02:19,409 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:15" (1/1) ...
[2023-11-29 03:02:19,830 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 03:02:19,830 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:15" (1/1) ...
[2023-11-29 03:02:19,831 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:15" (1/1) ...
[2023-11-29 03:02:20,527 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:15" (1/1) ...
[2023-11-29 03:02:20,685 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:15" (1/1) ...
[2023-11-29 03:02:20,851 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:15" (1/1) ...
[2023-11-29 03:02:20,982 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:15" (1/1) ...
[2023-11-29 03:02:21,426 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-29 03:02:21,427 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-29 03:02:21,427 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-29 03:02:21,427 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-29 03:02:21,428 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:15" (1/1) ...
[2023-11-29 03:02:21,433 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 03:02:21,442 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:02:21,453 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-29 03:02:21,454 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-29 03:02:21,482 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-29 03:02:21,482 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-29 03:02:21,482 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-29 03:02:21,482 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-29 03:02:23,216 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-29 03:02:23,218 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-29 03:02:51,796 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-29 03:02:52,442 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-29 03:02:52,442 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-29 03:02:52,447 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:02:52 BoogieIcfgContainer
[2023-11-29 03:02:52,447 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-29 03:02:52,450 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-29 03:02:52,450 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-29 03:02:52,453 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-29 03:02:52,453 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:02:13" (1/3) ...
[2023-11-29 03:02:52,454 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf5d23f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:02:52, skipping insertion in model container
[2023-11-29 03:02:52,454 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:02:15" (2/3) ...
[2023-11-29 03:02:52,455 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf5d23f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:02:52, skipping insertion in model container
[2023-11-29 03:02:52,455 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:02:52" (3/3) ...
[2023-11-29 03:02:52,456 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.synapse.4.prop1-back-serstep.c
[2023-11-29 03:02:52,474 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-29 03:02:52,474 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-29 03:02:52,645 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-29 03:02:52,652 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@dfa36, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-29 03:02:52,652 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-29 03:02:52,683 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 9820 states, 9818 states have (on average 1.6675493990629455) internal successors, (16372), 9819 states have internal predecessors, (16372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:02:52,731 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 811
[2023-11-29 03:02:52,731 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:02:52,732 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]
[2023-11-29 03:02:52,733 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:02:52,738 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:02:52,738 INFO  L85        PathProgramCache]: Analyzing trace with hash -1614648047, now seen corresponding path program 1 times
[2023-11-29 03:02:52,747 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:02:52,748 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790583970]
[2023-11-29 03:02:52,748 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:02:52,749 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:02:53,536 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:02:56,692 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 03:02:56,692 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:02:56,693 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790583970]
[2023-11-29 03:02:56,693 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790583970] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:02:56,694 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:02:56,694 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:02:56,696 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861176527]
[2023-11-29 03:02:56,696 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:02:56,702 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:02:56,703 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:02:56,731 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:02:56,732 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:02:56,754 INFO  L87              Difference]: Start difference. First operand  has 9820 states, 9818 states have (on average 1.6675493990629455) internal successors, (16372), 9819 states have internal predecessors, (16372), 0 states have call successors, (0), 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 202.5) internal successors, (810), 4 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:02:57,484 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:02:57,485 INFO  L93              Difference]: Finished difference Result 19450 states and 32430 transitions.
[2023-11-29 03:02:57,486 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:02:57,487 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 202.5) internal successors, (810), 4 states have internal predecessors, (810), 0 states have call successors, (0), 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 810
[2023-11-29 03:02:57,492 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:02:57,558 INFO  L225             Difference]: With dead ends: 19450
[2023-11-29 03:02:57,558 INFO  L226             Difference]: Without dead ends: 9820
[2023-11-29 03:02:57,573 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 03:02:57,576 INFO  L413           NwaCegarLoop]: 16365 mSDtfsCounter, 1 mSDsluCounter, 32725 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49090 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:02:57,577 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49090 Invalid, 13 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:02:57,614 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9820 states.
[2023-11-29 03:02:57,802 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9820 to 9820.
[2023-11-29 03:02:57,826 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9820 states, 9819 states have (on average 1.6671758834911905) internal successors, (16370), 9819 states have internal predecessors, (16370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:02:57,866 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9820 states to 9820 states and 16370 transitions.
[2023-11-29 03:02:57,868 INFO  L78                 Accepts]: Start accepts. Automaton has 9820 states and 16370 transitions. Word has length 810
[2023-11-29 03:02:57,870 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:02:57,871 INFO  L495      AbstractCegarLoop]: Abstraction has 9820 states and 16370 transitions.
[2023-11-29 03:02:57,871 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 202.5) internal successors, (810), 4 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:02:57,872 INFO  L276                IsEmpty]: Start isEmpty. Operand 9820 states and 16370 transitions.
[2023-11-29 03:02:57,900 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 812
[2023-11-29 03:02:57,900 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:02:57,901 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]
[2023-11-29 03:02:57,901 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-29 03:02:57,901 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:02:57,902 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:02:57,903 INFO  L85        PathProgramCache]: Analyzing trace with hash 1487247879, now seen corresponding path program 1 times
[2023-11-29 03:02:57,903 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:02:57,903 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390766129]
[2023-11-29 03:02:57,903 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:02:57,904 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:02:58,302 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:02:59,589 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 03:02:59,589 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:02:59,589 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390766129]
[2023-11-29 03:02:59,589 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390766129] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:02:59,590 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:02:59,590 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:02:59,590 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319930908]
[2023-11-29 03:02:59,590 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:02:59,593 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:02:59,593 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:02:59,595 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:02:59,595 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:02:59,596 INFO  L87              Difference]: Start difference. First operand 9820 states and 16370 transitions. Second operand  has 4 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:00,229 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:03:00,229 INFO  L93              Difference]: Finished difference Result 19453 states and 32428 transitions.
[2023-11-29 03:03:00,230 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:03:00,231 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 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 811
[2023-11-29 03:03:00,233 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:03:00,284 INFO  L225             Difference]: With dead ends: 19453
[2023-11-29 03:03:00,285 INFO  L226             Difference]: Without dead ends: 9823
[2023-11-29 03:03:00,297 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 03:03:00,298 INFO  L413           NwaCegarLoop]: 16365 mSDtfsCounter, 1 mSDsluCounter, 32723 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49088 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:03:00,299 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49088 Invalid, 15 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:03:00,318 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9823 states.
[2023-11-29 03:03:00,481 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9823 to 9822.
[2023-11-29 03:03:00,495 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9822 states, 9821 states have (on average 1.66704001629162) internal successors, (16372), 9821 states have internal predecessors, (16372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:00,529 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9822 states to 9822 states and 16372 transitions.
[2023-11-29 03:03:00,529 INFO  L78                 Accepts]: Start accepts. Automaton has 9822 states and 16372 transitions. Word has length 811
[2023-11-29 03:03:00,531 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:03:00,531 INFO  L495      AbstractCegarLoop]: Abstraction has 9822 states and 16372 transitions.
[2023-11-29 03:03:00,532 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:00,532 INFO  L276                IsEmpty]: Start isEmpty. Operand 9822 states and 16372 transitions.
[2023-11-29 03:03:00,540 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 813
[2023-11-29 03:03:00,540 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:03:00,541 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]
[2023-11-29 03:03:00,541 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-29 03:03:00,541 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:03:00,542 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:03:00,542 INFO  L85        PathProgramCache]: Analyzing trace with hash 424623725, now seen corresponding path program 1 times
[2023-11-29 03:03:00,543 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:03:00,543 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868163598]
[2023-11-29 03:03:00,543 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:03:00,544 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:03:00,912 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:03:02,056 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 03:03:02,056 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:03:02,056 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868163598]
[2023-11-29 03:03:02,056 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868163598] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:03:02,057 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:03:02,057 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:03:02,057 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173786322]
[2023-11-29 03:03:02,057 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:03:02,059 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:03:02,059 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:03:02,060 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:03:02,060 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:03:02,061 INFO  L87              Difference]: Start difference. First operand 9822 states and 16372 transitions. Second operand  has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:02,486 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:03:02,486 INFO  L93              Difference]: Finished difference Result 29080 states and 48475 transitions.
[2023-11-29 03:03:02,486 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 03:03:02,487 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 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 812
[2023-11-29 03:03:02,488 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:03:02,533 INFO  L225             Difference]: With dead ends: 29080
[2023-11-29 03:03:02,533 INFO  L226             Difference]: Without dead ends: 19448
[2023-11-29 03:03:02,545 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 03:03:02,547 INFO  L413           NwaCegarLoop]: 18055 mSDtfsCounter, 16043 mSDsluCounter, 34411 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16043 SdHoareTripleChecker+Valid, 52466 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:03:02,547 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [16043 Valid, 52466 Invalid, 19 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:03:02,570 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19448 states.
[2023-11-29 03:03:02,726 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19448 to 9824.
[2023-11-29 03:03:02,738 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9824 states, 9823 states have (on average 1.666904204418202) internal successors, (16374), 9823 states have internal predecessors, (16374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:02,752 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9824 states to 9824 states and 16374 transitions.
[2023-11-29 03:03:02,753 INFO  L78                 Accepts]: Start accepts. Automaton has 9824 states and 16374 transitions. Word has length 812
[2023-11-29 03:03:02,754 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:03:02,754 INFO  L495      AbstractCegarLoop]: Abstraction has 9824 states and 16374 transitions.
[2023-11-29 03:03:02,754 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:02,755 INFO  L276                IsEmpty]: Start isEmpty. Operand 9824 states and 16374 transitions.
[2023-11-29 03:03:02,760 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 814
[2023-11-29 03:03:02,760 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:03:02,761 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]
[2023-11-29 03:03:02,761 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-29 03:03:02,761 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:03:02,762 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:03:02,762 INFO  L85        PathProgramCache]: Analyzing trace with hash 167731887, now seen corresponding path program 1 times
[2023-11-29 03:03:02,763 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:03:02,763 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278791400]
[2023-11-29 03:03:02,763 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:03:02,763 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:03:02,990 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:03:04,363 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 03:03:04,364 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:03:04,364 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278791400]
[2023-11-29 03:03:04,364 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278791400] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:03:04,364 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:03:04,365 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:03:04,365 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598217257]
[2023-11-29 03:03:04,365 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:03:04,366 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:03:04,367 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:03:04,368 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:03:04,368 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-29 03:03:04,368 INFO  L87              Difference]: Start difference. First operand 9824 states and 16374 transitions. Second operand  has 5 states, 5 states have (on average 162.6) internal successors, (813), 4 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:04,972 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:03:04,972 INFO  L93              Difference]: Finished difference Result 30100 states and 50171 transitions.
[2023-11-29 03:03:04,973 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:03:04,973 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 162.6) internal successors, (813), 4 states have internal predecessors, (813), 0 states have call successors, (0), 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 813
[2023-11-29 03:03:04,974 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:03:04,997 INFO  L225             Difference]: With dead ends: 30100
[2023-11-29 03:03:04,998 INFO  L226             Difference]: Without dead ends: 20466
[2023-11-29 03:03:05,010 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 03:03:05,011 INFO  L413           NwaCegarLoop]: 18054 mSDtfsCounter, 65386 mSDsluCounter, 32724 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65386 SdHoareTripleChecker+Valid, 50778 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 03:03:05,012 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [65386 Valid, 50778 Invalid, 16 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:03:05,030 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20466 states.
[2023-11-29 03:03:05,173 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20466 to 10838.
[2023-11-29 03:03:05,186 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10838 states, 10837 states have (on average 1.6668819784073083) internal successors, (18064), 10837 states have internal predecessors, (18064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:05,200 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10838 states to 10838 states and 18064 transitions.
[2023-11-29 03:03:05,201 INFO  L78                 Accepts]: Start accepts. Automaton has 10838 states and 18064 transitions. Word has length 813
[2023-11-29 03:03:05,201 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:03:05,202 INFO  L495      AbstractCegarLoop]: Abstraction has 10838 states and 18064 transitions.
[2023-11-29 03:03:05,202 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 162.6) internal successors, (813), 4 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:05,202 INFO  L276                IsEmpty]: Start isEmpty. Operand 10838 states and 18064 transitions.
[2023-11-29 03:03:05,458 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7185
[2023-11-29 03:03:05,458 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:03:05,462 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 03:03:05,462 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-29 03:03:05,463 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:03:05,463 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:03:05,465 INFO  L85        PathProgramCache]: Analyzing trace with hash 1862657452, now seen corresponding path program 1 times
[2023-11-29 03:03:05,465 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:03:05,465 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898712758]
[2023-11-29 03:03:05,466 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:03:05,466 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:03:06,630 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:03:06,630 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449065616]
[2023-11-29 03:03:06,632 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:03:06,632 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:03:06,632 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:03:06,635 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:03:06,641 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-29 03:03:15,542 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:03:15,767 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34804 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 03:03:15,960 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:03:16,294 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 682 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:03:16,294 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 03:03:16,295 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:03:16,295 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898712758]
[2023-11-29 03:03:16,295 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:03:16,295 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449065616]
[2023-11-29 03:03:16,295 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [449065616] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:03:16,296 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:03:16,298 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:03:16,299 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859209416]
[2023-11-29 03:03:16,299 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:03:16,308 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:03:16,308 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:03:16,315 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:03:16,316 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:03:16,318 INFO  L87              Difference]: Start difference. First operand 10838 states and 18064 transitions. Second operand  has 4 states, 4 states have (on average 1796.0) internal successors, (7184), 4 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:16,626 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:03:16,627 INFO  L93              Difference]: Finished difference Result 20482 states and 34138 transitions.
[2023-11-29 03:03:16,627 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:03:16,630 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1796.0) internal successors, (7184), 4 states have internal predecessors, (7184), 0 states have call successors, (0), 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 7184
[2023-11-29 03:03:16,634 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:03:16,648 INFO  L225             Difference]: With dead ends: 20482
[2023-11-29 03:03:16,648 INFO  L226             Difference]: Without dead ends: 10848
[2023-11-29 03:03:16,659 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 7183 GetRequests, 7181 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 03:03:16,660 INFO  L413           NwaCegarLoop]: 16365 mSDtfsCounter, 12 mSDsluCounter, 32720 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 49085 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 03:03:16,660 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 49085 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:03:16,675 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10848 states.
[2023-11-29 03:03:16,803 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10848 to 10840.
[2023-11-29 03:03:16,815 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10840 states, 10839 states have (on average 1.6667589261001938) internal successors, (18066), 10839 states have internal predecessors, (18066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:16,831 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10840 states to 10840 states and 18066 transitions.
[2023-11-29 03:03:16,831 INFO  L78                 Accepts]: Start accepts. Automaton has 10840 states and 18066 transitions. Word has length 7184
[2023-11-29 03:03:16,835 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:03:16,835 INFO  L495      AbstractCegarLoop]: Abstraction has 10840 states and 18066 transitions.
[2023-11-29 03:03:16,837 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1796.0) internal successors, (7184), 4 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:16,837 INFO  L276                IsEmpty]: Start isEmpty. Operand 10840 states and 18066 transitions.
[2023-11-29 03:03:17,335 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7185
[2023-11-29 03:03:17,335 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:03:17,339 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 03:03:17,448 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-29 03:03:17,540 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:03:17,540 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:03:17,541 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:03:17,543 INFO  L85        PathProgramCache]: Analyzing trace with hash -42598150, now seen corresponding path program 1 times
[2023-11-29 03:03:17,544 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:03:17,544 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981397161]
[2023-11-29 03:03:17,545 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:03:17,545 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:03:18,624 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:03:18,625 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618803312]
[2023-11-29 03:03:18,626 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:03:18,626 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:03:18,626 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:03:18,627 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:03:18,643 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-29 03:03:27,020 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:03:27,248 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34805 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 03:03:27,418 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:03:27,843 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 682 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:03:27,843 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 03:03:27,843 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:03:27,843 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981397161]
[2023-11-29 03:03:27,844 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:03:27,844 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618803312]
[2023-11-29 03:03:27,844 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618803312] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:03:27,844 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:03:27,846 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:03:27,847 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649800795]
[2023-11-29 03:03:27,847 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:03:27,857 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:03:27,857 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:03:27,867 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:03:27,867 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:03:27,870 INFO  L87              Difference]: Start difference. First operand 10840 states and 18066 transitions. Second operand  has 4 states, 4 states have (on average 1796.0) internal successors, (7184), 4 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:28,196 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:03:28,196 INFO  L93              Difference]: Finished difference Result 20485 states and 34140 transitions.
[2023-11-29 03:03:28,197 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:03:28,199 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1796.0) internal successors, (7184), 4 states have internal predecessors, (7184), 0 states have call successors, (0), 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 7184
[2023-11-29 03:03:28,209 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:03:28,231 INFO  L225             Difference]: With dead ends: 20485
[2023-11-29 03:03:28,231 INFO  L226             Difference]: Without dead ends: 10849
[2023-11-29 03:03:28,246 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 7183 GetRequests, 7181 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 03:03:28,247 INFO  L413           NwaCegarLoop]: 16365 mSDtfsCounter, 12 mSDsluCounter, 32720 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 49085 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 03:03:28,247 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 49085 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:03:28,266 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10849 states.
[2023-11-29 03:03:28,434 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10849 to 10841.
[2023-11-29 03:03:28,446 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10841 states, 10840 states have (on average 1.6666974169741697) internal successors, (18067), 10840 states have internal predecessors, (18067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:28,470 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10841 states to 10841 states and 18067 transitions.
[2023-11-29 03:03:28,471 INFO  L78                 Accepts]: Start accepts. Automaton has 10841 states and 18067 transitions. Word has length 7184
[2023-11-29 03:03:28,478 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:03:28,478 INFO  L495      AbstractCegarLoop]: Abstraction has 10841 states and 18067 transitions.
[2023-11-29 03:03:28,480 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1796.0) internal successors, (7184), 4 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:28,481 INFO  L276                IsEmpty]: Start isEmpty. Operand 10841 states and 18067 transitions.
[2023-11-29 03:03:29,194 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7185
[2023-11-29 03:03:29,194 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:03:29,198 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 03:03:29,287 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-29 03:03:29,398 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-11-29 03:03:29,400 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:03:29,407 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:03:29,414 INFO  L85        PathProgramCache]: Analyzing trace with hash -756384312, now seen corresponding path program 1 times
[2023-11-29 03:03:29,415 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:03:29,415 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364664254]
[2023-11-29 03:03:29,417 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:03:29,418 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:03:30,208 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:03:30,208 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621168441]
[2023-11-29 03:03:30,209 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:03:30,209 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:03:30,209 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:03:30,210 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:03:30,211 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-29 03:03:38,398 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:03:38,615 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34806 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 03:03:38,889 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:03:39,058 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 682 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:03:39,058 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 03:03:39,059 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:03:39,059 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364664254]
[2023-11-29 03:03:39,059 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:03:39,059 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621168441]
[2023-11-29 03:03:39,059 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [621168441] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:03:39,059 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:03:39,062 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:03:39,062 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821621607]
[2023-11-29 03:03:39,062 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:03:39,067 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:03:39,067 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:03:39,072 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:03:39,073 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:03:39,074 INFO  L87              Difference]: Start difference. First operand 10841 states and 18067 transitions. Second operand  has 4 states, 4 states have (on average 1796.0) internal successors, (7184), 4 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:39,296 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:03:39,296 INFO  L93              Difference]: Finished difference Result 20487 states and 34142 transitions.
[2023-11-29 03:03:39,297 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:03:39,298 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1796.0) internal successors, (7184), 4 states have internal predecessors, (7184), 0 states have call successors, (0), 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 7184
[2023-11-29 03:03:39,305 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:03:39,317 INFO  L225             Difference]: With dead ends: 20487
[2023-11-29 03:03:39,317 INFO  L226             Difference]: Without dead ends: 10850
[2023-11-29 03:03:39,325 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 7183 GetRequests, 7181 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 03:03:39,325 INFO  L413           NwaCegarLoop]: 16365 mSDtfsCounter, 12 mSDsluCounter, 32720 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 49085 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 03:03:39,326 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 49085 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:03:39,338 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10850 states.
[2023-11-29 03:03:39,428 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10850 to 10842.
[2023-11-29 03:03:39,438 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10842 states, 10841 states have (on average 1.6666359191956461) internal successors, (18068), 10841 states have internal predecessors, (18068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:39,451 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10842 states to 10842 states and 18068 transitions.
[2023-11-29 03:03:39,451 INFO  L78                 Accepts]: Start accepts. Automaton has 10842 states and 18068 transitions. Word has length 7184
[2023-11-29 03:03:39,455 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:03:39,455 INFO  L495      AbstractCegarLoop]: Abstraction has 10842 states and 18068 transitions.
[2023-11-29 03:03:39,457 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1796.0) internal successors, (7184), 4 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:39,457 INFO  L276                IsEmpty]: Start isEmpty. Operand 10842 states and 18068 transitions.
[2023-11-29 03:03:39,780 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7185
[2023-11-29 03:03:39,780 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:03:39,784 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 03:03:39,873 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-29 03:03:39,985 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2023-11-29 03:03:39,986 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:03:39,987 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:03:39,997 INFO  L85        PathProgramCache]: Analyzing trace with hash -1341571178, now seen corresponding path program 1 times
[2023-11-29 03:03:39,997 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:03:39,998 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164941040]
[2023-11-29 03:03:40,002 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:03:40,003 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:03:40,772 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:03:40,772 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888285434]
[2023-11-29 03:03:40,773 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:03:40,773 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:03:40,774 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:03:40,774 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:03:40,775 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-29 03:03:48,942 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:03:49,154 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34807 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-29 03:03:49,291 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:03:49,438 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 682 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:03:49,438 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 03:03:49,438 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:03:49,438 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164941040]
[2023-11-29 03:03:49,439 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:03:49,439 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888285434]
[2023-11-29 03:03:49,439 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [888285434] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:03:49,439 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:03:49,441 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-29 03:03:49,442 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207391543]
[2023-11-29 03:03:49,442 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:03:49,447 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:03:49,447 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:03:49,585 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:03:49,585 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-29 03:03:49,587 INFO  L87              Difference]: Start difference. First operand 10842 states and 18068 transitions. Second operand  has 5 states, 5 states have (on average 1436.8) internal successors, (7184), 5 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:50,077 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:03:50,077 INFO  L93              Difference]: Finished difference Result 30128 states and 50206 transitions.
[2023-11-29 03:03:50,077 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 03:03:50,079 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1436.8) internal successors, (7184), 5 states have internal predecessors, (7184), 0 states have call successors, (0), 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 7184
[2023-11-29 03:03:50,082 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:03:50,102 INFO  L225             Difference]: With dead ends: 30128
[2023-11-29 03:03:50,102 INFO  L226             Difference]: Without dead ends: 20490
[2023-11-29 03:03:50,116 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 7186 GetRequests, 7181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2023-11-29 03:03:50,117 INFO  L413           NwaCegarLoop]: 22854 mSDtfsCounter, 16063 mSDsluCounter, 62055 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16063 SdHoareTripleChecker+Valid, 84909 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:03:50,118 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [16063 Valid, 84909 Invalid, 36 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:03:50,153 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20490 states.
[2023-11-29 03:03:50,296 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20490 to 10844.
[2023-11-29 03:03:50,307 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10844 states, 10843 states have (on average 1.666512957668542) internal successors, (18070), 10843 states have internal predecessors, (18070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:50,324 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10844 states to 10844 states and 18070 transitions.
[2023-11-29 03:03:50,325 INFO  L78                 Accepts]: Start accepts. Automaton has 10844 states and 18070 transitions. Word has length 7184
[2023-11-29 03:03:50,328 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:03:50,328 INFO  L495      AbstractCegarLoop]: Abstraction has 10844 states and 18070 transitions.
[2023-11-29 03:03:50,329 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1436.8) internal successors, (7184), 5 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:03:50,330 INFO  L276                IsEmpty]: Start isEmpty. Operand 10844 states and 18070 transitions.
[2023-11-29 03:03:50,565 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7185
[2023-11-29 03:03:50,565 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:03:50,568 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 03:03:50,661 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-29 03:03:50,769 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:03:50,770 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:03:50,771 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:03:50,777 INFO  L85        PathProgramCache]: Analyzing trace with hash 331333976, now seen corresponding path program 1 times
[2023-11-29 03:03:50,778 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:03:50,778 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473454263]
[2023-11-29 03:03:50,780 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:03:50,781 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:03:51,570 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:03:51,570 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232874030]
[2023-11-29 03:03:51,571 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:03:51,571 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:03:51,572 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:03:51,572 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:03:51,574 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 03:03:59,571 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:03:59,790 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34807 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:03:59,905 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:04:02,809 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 6 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:04:02,810 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:04:02,956 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked.
[2023-11-29 03:04:02,956 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:04:02,956 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473454263]
[2023-11-29 03:04:02,957 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:04:02,957 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232874030]
[2023-11-29 03:04:02,957 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232874030] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:04:02,957 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:04:02,962 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:04:02,962 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199963248]
[2023-11-29 03:04:02,962 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:04:02,967 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:04:02,968 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:04:02,974 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:04:02,974 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:04:02,976 INFO  L87              Difference]: Start difference. First operand 10844 states and 18070 transitions. Second operand  has 5 states, 5 states have (on average 1302.2) internal successors, (6511), 5 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:04:14,947 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:04:14,947 INFO  L93              Difference]: Finished difference Result 38878 states and 64497 transitions.
[2023-11-29 03:04:14,947 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:04:14,949 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1302.2) internal successors, (6511), 5 states have internal predecessors, (6511), 0 states have call successors, (0), 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 7184
[2023-11-29 03:04:14,955 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:04:14,967 INFO  L225             Difference]: With dead ends: 38878
[2023-11-29 03:04:14,968 INFO  L226             Difference]: Without dead ends: 20477
[2023-11-29 03:04:14,975 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14367 GetRequests, 14358 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:04:14,975 INFO  L413           NwaCegarLoop]: 27089 mSDtfsCounter, 42871 mSDsluCounter, 25988 mSDsCounter, 0 mSdLazyCounter, 12817 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42871 SdHoareTripleChecker+Valid, 53077 SdHoareTripleChecker+Invalid, 13692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 12817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time
[2023-11-29 03:04:14,975 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42871 Valid, 53077 Invalid, 13692 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 12817 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time]
[2023-11-29 03:04:14,992 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20477 states.
[2023-11-29 03:04:15,093 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20477 to 10846.
[2023-11-29 03:04:15,102 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10846 states, 10845 states have (on average 1.666390041493776) internal successors, (18072), 10845 states have internal predecessors, (18072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:04:15,115 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10846 states to 10846 states and 18072 transitions.
[2023-11-29 03:04:15,115 INFO  L78                 Accepts]: Start accepts. Automaton has 10846 states and 18072 transitions. Word has length 7184
[2023-11-29 03:04:15,119 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:04:15,119 INFO  L495      AbstractCegarLoop]: Abstraction has 10846 states and 18072 transitions.
[2023-11-29 03:04:15,120 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1302.2) internal successors, (6511), 5 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:04:15,120 INFO  L276                IsEmpty]: Start isEmpty. Operand 10846 states and 18072 transitions.
[2023-11-29 03:04:15,323 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7186
[2023-11-29 03:04:15,323 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:04:15,326 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 03:04:15,421 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-29 03:04:15,527 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:04:15,527 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:04:15,528 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:04:15,530 INFO  L85        PathProgramCache]: Analyzing trace with hash 1482620350, now seen corresponding path program 1 times
[2023-11-29 03:04:15,530 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:04:15,530 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061820724]
[2023-11-29 03:04:15,530 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:04:15,531 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:04:16,363 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:04:16,364 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242960133]
[2023-11-29 03:04:16,365 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:04:16,365 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:04:16,365 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:04:16,366 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:04:16,367 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 03:04:24,299 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:04:24,535 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34810 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:04:24,638 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:04:27,564 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 8 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:04:27,564 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:04:27,724 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked.
[2023-11-29 03:04:27,724 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:04:27,725 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061820724]
[2023-11-29 03:04:27,725 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:04:27,725 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242960133]
[2023-11-29 03:04:27,725 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242960133] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:04:27,725 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:04:27,729 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:04:27,730 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728634202]
[2023-11-29 03:04:27,730 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:04:27,736 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:04:27,736 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:04:27,741 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:04:27,741 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:04:27,742 INFO  L87              Difference]: Start difference. First operand 10846 states and 18072 transitions. Second operand  has 5 states, 5 states have (on average 1302.8) internal successors, (6514), 5 states have internal predecessors, (6514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:04:39,165 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:04:39,165 INFO  L93              Difference]: Finished difference Result 38886 states and 64505 transitions.
[2023-11-29 03:04:39,166 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:04:39,167 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1302.8) internal successors, (6514), 5 states have internal predecessors, (6514), 0 states have call successors, (0), 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 7185
[2023-11-29 03:04:39,172 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:04:39,187 INFO  L225             Difference]: With dead ends: 38886
[2023-11-29 03:04:39,187 INFO  L226             Difference]: Without dead ends: 20478
[2023-11-29 03:04:39,308 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14369 GetRequests, 14360 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:04:39,309 INFO  L413           NwaCegarLoop]: 27081 mSDtfsCounter, 42865 mSDsluCounter, 25982 mSDsCounter, 0 mSdLazyCounter, 12817 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42865 SdHoareTripleChecker+Valid, 53063 SdHoareTripleChecker+Invalid, 13692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 12817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time
[2023-11-29 03:04:39,310 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42865 Valid, 53063 Invalid, 13692 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 12817 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time]
[2023-11-29 03:04:39,328 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20478 states.
[2023-11-29 03:04:39,451 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20478 to 10848.
[2023-11-29 03:04:39,463 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10848 states, 10847 states have (on average 1.6662671706462617) internal successors, (18074), 10847 states have internal predecessors, (18074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:04:39,480 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10848 states to 10848 states and 18074 transitions.
[2023-11-29 03:04:39,480 INFO  L78                 Accepts]: Start accepts. Automaton has 10848 states and 18074 transitions. Word has length 7185
[2023-11-29 03:04:39,485 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:04:39,485 INFO  L495      AbstractCegarLoop]: Abstraction has 10848 states and 18074 transitions.
[2023-11-29 03:04:39,487 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1302.8) internal successors, (6514), 5 states have internal predecessors, (6514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:04:39,487 INFO  L276                IsEmpty]: Start isEmpty. Operand 10848 states and 18074 transitions.
[2023-11-29 03:04:39,691 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7187
[2023-11-29 03:04:39,691 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:04:39,695 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 03:04:39,793 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-29 03:04:39,907 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-29 03:04:39,909 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:04:39,909 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:04:39,916 INFO  L85        PathProgramCache]: Analyzing trace with hash -1743417538, now seen corresponding path program 1 times
[2023-11-29 03:04:39,917 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:04:39,917 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815996106]
[2023-11-29 03:04:39,919 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:04:39,920 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:04:40,682 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:04:40,682 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049925929]
[2023-11-29 03:04:40,683 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:04:40,683 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:04:40,684 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:04:40,684 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:04:40,685 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 03:04:48,849 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:04:49,074 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34813 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:04:49,175 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:04:52,209 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 10 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:04:52,210 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:04:52,343 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked.
[2023-11-29 03:04:52,344 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:04:52,344 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815996106]
[2023-11-29 03:04:52,344 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:04:52,344 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049925929]
[2023-11-29 03:04:52,344 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049925929] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:04:52,344 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:04:52,347 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:04:52,348 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763090533]
[2023-11-29 03:04:52,348 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:04:52,352 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:04:52,352 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:04:52,359 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:04:52,359 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:04:52,361 INFO  L87              Difference]: Start difference. First operand 10848 states and 18074 transitions. Second operand  has 5 states, 5 states have (on average 1303.4) internal successors, (6517), 5 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:05:03,548 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:05:03,548 INFO  L93              Difference]: Finished difference Result 38894 states and 64513 transitions.
[2023-11-29 03:05:03,549 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:05:03,550 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1303.4) internal successors, (6517), 5 states have internal predecessors, (6517), 0 states have call successors, (0), 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 7186
[2023-11-29 03:05:03,555 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:05:03,569 INFO  L225             Difference]: With dead ends: 38894
[2023-11-29 03:05:03,570 INFO  L226             Difference]: Without dead ends: 20479
[2023-11-29 03:05:03,584 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14371 GetRequests, 14362 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:05:03,584 INFO  L413           NwaCegarLoop]: 27073 mSDtfsCounter, 42857 mSDsluCounter, 25977 mSDsCounter, 0 mSdLazyCounter, 12817 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42857 SdHoareTripleChecker+Valid, 53050 SdHoareTripleChecker+Invalid, 13692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 12817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time
[2023-11-29 03:05:03,585 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42857 Valid, 53050 Invalid, 13692 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 12817 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time]
[2023-11-29 03:05:03,608 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20479 states.
[2023-11-29 03:05:03,717 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20479 to 10850.
[2023-11-29 03:05:03,727 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10850 states, 10849 states have (on average 1.666144345100931) internal successors, (18076), 10849 states have internal predecessors, (18076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:05:03,740 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10850 states to 10850 states and 18076 transitions.
[2023-11-29 03:05:03,740 INFO  L78                 Accepts]: Start accepts. Automaton has 10850 states and 18076 transitions. Word has length 7186
[2023-11-29 03:05:03,744 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:05:03,744 INFO  L495      AbstractCegarLoop]: Abstraction has 10850 states and 18076 transitions.
[2023-11-29 03:05:03,745 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1303.4) internal successors, (6517), 5 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:05:03,745 INFO  L276                IsEmpty]: Start isEmpty. Operand 10850 states and 18076 transitions.
[2023-11-29 03:05:04,021 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7188
[2023-11-29 03:05:04,022 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:05:04,025 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 03:05:04,125 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-29 03:05:04,225 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:05:04,227 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:05:04,230 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:05:04,238 INFO  L85        PathProgramCache]: Analyzing trace with hash 418731610, now seen corresponding path program 1 times
[2023-11-29 03:05:04,238 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:05:04,238 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756217721]
[2023-11-29 03:05:04,241 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:05:04,241 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:05:04,981 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:05:04,981 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617376272]
[2023-11-29 03:05:04,982 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:05:04,982 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:05:04,983 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:05:04,983 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:05:04,984 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 03:05:13,425 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:05:13,638 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34817 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:05:13,736 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:05:16,523 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 12 proven. 670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:05:16,523 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:05:16,914 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 668 trivial. 0 not checked.
[2023-11-29 03:05:16,915 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:05:16,915 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756217721]
[2023-11-29 03:05:16,915 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:05:16,915 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617376272]
[2023-11-29 03:05:16,915 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617376272] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:05:16,915 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:05:16,920 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:05:16,920 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744153725]
[2023-11-29 03:05:16,921 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:05:16,925 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:05:16,925 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:05:16,930 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:05:16,930 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:05:16,932 INFO  L87              Difference]: Start difference. First operand 10850 states and 18076 transitions. Second operand  has 5 states, 5 states have (on average 1304.0) internal successors, (6520), 5 states have internal predecessors, (6520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:05:30,217 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:05:30,217 INFO  L93              Difference]: Finished difference Result 38902 states and 64521 transitions.
[2023-11-29 03:05:30,218 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:05:30,220 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1304.0) internal successors, (6520), 5 states have internal predecessors, (6520), 0 states have call successors, (0), 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 7187
[2023-11-29 03:05:30,227 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:05:30,242 INFO  L225             Difference]: With dead ends: 38902
[2023-11-29 03:05:30,243 INFO  L226             Difference]: Without dead ends: 20480
[2023-11-29 03:05:30,254 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14373 GetRequests, 14364 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:05:30,254 INFO  L413           NwaCegarLoop]: 27065 mSDtfsCounter, 29438 mSDsluCounter, 39274 mSDsCounter, 0 mSdLazyCounter, 17553 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29438 SdHoareTripleChecker+Valid, 66339 SdHoareTripleChecker+Invalid, 18428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 17553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time
[2023-11-29 03:05:30,255 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29438 Valid, 66339 Invalid, 18428 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 17553 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time]
[2023-11-29 03:05:30,275 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20480 states.
[2023-11-29 03:05:30,407 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20480 to 10852.
[2023-11-29 03:05:30,416 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10852 states, 10851 states have (on average 1.6660215648327343) internal successors, (18078), 10851 states have internal predecessors, (18078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:05:30,430 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10852 states to 10852 states and 18078 transitions.
[2023-11-29 03:05:30,430 INFO  L78                 Accepts]: Start accepts. Automaton has 10852 states and 18078 transitions. Word has length 7187
[2023-11-29 03:05:30,434 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:05:30,434 INFO  L495      AbstractCegarLoop]: Abstraction has 10852 states and 18078 transitions.
[2023-11-29 03:05:30,436 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1304.0) internal successors, (6520), 5 states have internal predecessors, (6520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:05:30,436 INFO  L276                IsEmpty]: Start isEmpty. Operand 10852 states and 18078 transitions.
[2023-11-29 03:05:30,676 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7189
[2023-11-29 03:05:30,676 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:05:30,677 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 03:05:30,774 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-29 03:05:30,878 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-29 03:05:30,880 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:05:30,883 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:05:30,887 INFO  L85        PathProgramCache]: Analyzing trace with hash -1712254298, now seen corresponding path program 1 times
[2023-11-29 03:05:30,887 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:05:30,887 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189730593]
[2023-11-29 03:05:30,890 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:05:30,890 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:05:31,619 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:05:31,619 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051599047]
[2023-11-29 03:05:31,620 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:05:31,620 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:05:31,620 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:05:31,621 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:05:31,622 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 03:05:39,631 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:05:39,838 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34820 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:05:39,930 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:05:42,731 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 14 proven. 668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:05:42,731 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:05:42,875 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked.
[2023-11-29 03:05:42,875 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:05:42,875 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189730593]
[2023-11-29 03:05:42,875 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:05:42,875 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051599047]
[2023-11-29 03:05:42,875 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051599047] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:05:42,875 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:05:42,880 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:05:42,880 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275885668]
[2023-11-29 03:05:42,880 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:05:42,885 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:05:42,885 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:05:42,892 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:05:42,892 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:05:42,894 INFO  L87              Difference]: Start difference. First operand 10852 states and 18078 transitions. Second operand  has 5 states, 5 states have (on average 1304.6) internal successors, (6523), 5 states have internal predecessors, (6523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:05:56,102 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:05:56,102 INFO  L93              Difference]: Finished difference Result 38910 states and 64529 transitions.
[2023-11-29 03:05:56,103 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:05:56,104 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1304.6) internal successors, (6523), 5 states have internal predecessors, (6523), 0 states have call successors, (0), 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 7188
[2023-11-29 03:05:56,109 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:05:56,123 INFO  L225             Difference]: With dead ends: 38910
[2023-11-29 03:05:56,123 INFO  L226             Difference]: Without dead ends: 20481
[2023-11-29 03:05:56,133 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14375 GetRequests, 14366 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:05:56,134 INFO  L413           NwaCegarLoop]: 27057 mSDtfsCounter, 29432 mSDsluCounter, 39264 mSDsCounter, 0 mSdLazyCounter, 17553 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29432 SdHoareTripleChecker+Valid, 66321 SdHoareTripleChecker+Invalid, 18428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 17553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time
[2023-11-29 03:05:56,134 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29432 Valid, 66321 Invalid, 18428 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 17553 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time]
[2023-11-29 03:05:56,154 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20481 states.
[2023-11-29 03:05:56,259 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20481 to 10854.
[2023-11-29 03:05:56,268 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10854 states, 10853 states have (on average 1.6658988298166406) internal successors, (18080), 10853 states have internal predecessors, (18080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:05:56,281 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10854 states to 10854 states and 18080 transitions.
[2023-11-29 03:05:56,281 INFO  L78                 Accepts]: Start accepts. Automaton has 10854 states and 18080 transitions. Word has length 7188
[2023-11-29 03:05:56,285 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:05:56,285 INFO  L495      AbstractCegarLoop]: Abstraction has 10854 states and 18080 transitions.
[2023-11-29 03:05:56,286 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1304.6) internal successors, (6523), 5 states have internal predecessors, (6523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:05:56,286 INFO  L276                IsEmpty]: Start isEmpty. Operand 10854 states and 18080 transitions.
[2023-11-29 03:05:56,518 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7190
[2023-11-29 03:05:56,519 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:05:56,520 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 03:05:56,619 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-29 03:05:56,721 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:05:56,722 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:05:56,723 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:05:56,726 INFO  L85        PathProgramCache]: Analyzing trace with hash -866219660, now seen corresponding path program 1 times
[2023-11-29 03:05:56,727 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:05:56,727 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557350982]
[2023-11-29 03:05:56,729 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:05:56,730 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:05:57,489 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:05:57,489 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123824335]
[2023-11-29 03:05:57,490 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:05:57,490 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:05:57,490 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:05:57,491 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:05:57,493 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 03:06:05,250 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:06:05,470 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34823 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:06:05,559 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:06:08,290 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 16 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:06:08,290 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:06:08,443 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked.
[2023-11-29 03:06:08,444 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:06:08,444 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557350982]
[2023-11-29 03:06:08,444 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:06:08,444 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123824335]
[2023-11-29 03:06:08,444 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123824335] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:06:08,444 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:06:08,448 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:06:08,449 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527115344]
[2023-11-29 03:06:08,449 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:06:08,453 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:06:08,454 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:06:08,459 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:06:08,459 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:06:08,461 INFO  L87              Difference]: Start difference. First operand 10854 states and 18080 transitions. Second operand  has 5 states, 5 states have (on average 1305.2) internal successors, (6526), 5 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:06:19,804 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:06:19,804 INFO  L93              Difference]: Finished difference Result 38918 states and 64537 transitions.
[2023-11-29 03:06:19,804 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:06:19,805 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1305.2) internal successors, (6526), 5 states have internal predecessors, (6526), 0 states have call successors, (0), 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 7189
[2023-11-29 03:06:19,810 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:06:19,825 INFO  L225             Difference]: With dead ends: 38918
[2023-11-29 03:06:19,825 INFO  L226             Difference]: Without dead ends: 20482
[2023-11-29 03:06:19,836 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14377 GetRequests, 14368 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:06:19,836 INFO  L413           NwaCegarLoop]: 27049 mSDtfsCounter, 42826 mSDsluCounter, 25963 mSDsCounter, 0 mSdLazyCounter, 12817 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42826 SdHoareTripleChecker+Valid, 53012 SdHoareTripleChecker+Invalid, 13692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 12817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time
[2023-11-29 03:06:19,836 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42826 Valid, 53012 Invalid, 13692 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 12817 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time]
[2023-11-29 03:06:19,857 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20482 states.
[2023-11-29 03:06:19,965 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20482 to 10856.
[2023-11-29 03:06:19,975 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10856 states, 10855 states have (on average 1.665776140027637) internal successors, (18082), 10855 states have internal predecessors, (18082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:06:19,988 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10856 states to 10856 states and 18082 transitions.
[2023-11-29 03:06:19,988 INFO  L78                 Accepts]: Start accepts. Automaton has 10856 states and 18082 transitions. Word has length 7189
[2023-11-29 03:06:19,992 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:06:19,992 INFO  L495      AbstractCegarLoop]: Abstraction has 10856 states and 18082 transitions.
[2023-11-29 03:06:19,993 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1305.2) internal successors, (6526), 5 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:06:19,993 INFO  L276                IsEmpty]: Start isEmpty. Operand 10856 states and 18082 transitions.
[2023-11-29 03:06:20,199 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7191
[2023-11-29 03:06:20,199 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:06:20,200 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:06:20,297 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-29 03:06:20,401 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:06:20,402 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:06:20,403 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:06:20,406 INFO  L85        PathProgramCache]: Analyzing trace with hash 1327998092, now seen corresponding path program 1 times
[2023-11-29 03:06:20,406 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:06:20,406 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473286318]
[2023-11-29 03:06:20,409 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:06:20,409 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:06:21,285 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:06:21,285 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074024163]
[2023-11-29 03:06:21,286 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:06:21,286 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:06:21,286 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:06:21,287 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:06:21,288 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 03:06:29,379 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:06:29,599 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34826 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:06:29,687 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:06:32,481 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 18 proven. 664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:06:32,481 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:06:32,644 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 662 trivial. 0 not checked.
[2023-11-29 03:06:32,644 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:06:32,644 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473286318]
[2023-11-29 03:06:32,644 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:06:32,644 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074024163]
[2023-11-29 03:06:32,644 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074024163] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:06:32,644 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:06:32,648 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:06:32,648 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187172918]
[2023-11-29 03:06:32,648 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:06:32,651 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:06:32,651 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:06:32,654 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:06:32,655 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:06:32,656 INFO  L87              Difference]: Start difference. First operand 10856 states and 18082 transitions. Second operand  has 5 states, 5 states have (on average 1305.8) internal successors, (6529), 5 states have internal predecessors, (6529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:06:45,690 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:06:45,690 INFO  L93              Difference]: Finished difference Result 38926 states and 64545 transitions.
[2023-11-29 03:06:45,691 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:06:45,692 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1305.8) internal successors, (6529), 5 states have internal predecessors, (6529), 0 states have call successors, (0), 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 7190
[2023-11-29 03:06:45,697 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:06:45,710 INFO  L225             Difference]: With dead ends: 38926
[2023-11-29 03:06:45,710 INFO  L226             Difference]: Without dead ends: 20483
[2023-11-29 03:06:45,719 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14379 GetRequests, 14370 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:06:45,719 INFO  L413           NwaCegarLoop]: 27041 mSDtfsCounter, 29420 mSDsluCounter, 39244 mSDsCounter, 0 mSdLazyCounter, 17553 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29420 SdHoareTripleChecker+Valid, 66285 SdHoareTripleChecker+Invalid, 18428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 17553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time
[2023-11-29 03:06:45,719 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29420 Valid, 66285 Invalid, 18428 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 17553 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time]
[2023-11-29 03:06:45,738 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20483 states.
[2023-11-29 03:06:45,861 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20483 to 10858.
[2023-11-29 03:06:45,871 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10858 states, 10857 states have (on average 1.6656534954407294) internal successors, (18084), 10857 states have internal predecessors, (18084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:06:45,888 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10858 states to 10858 states and 18084 transitions.
[2023-11-29 03:06:45,888 INFO  L78                 Accepts]: Start accepts. Automaton has 10858 states and 18084 transitions. Word has length 7190
[2023-11-29 03:06:45,892 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:06:45,892 INFO  L495      AbstractCegarLoop]: Abstraction has 10858 states and 18084 transitions.
[2023-11-29 03:06:45,893 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1305.8) internal successors, (6529), 5 states have internal predecessors, (6529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:06:45,893 INFO  L276                IsEmpty]: Start isEmpty. Operand 10858 states and 18084 transitions.
[2023-11-29 03:06:46,091 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7192
[2023-11-29 03:06:46,091 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:06:46,092 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 03:06:46,193 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-29 03:06:46,293 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:06:46,295 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:06:46,296 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:06:46,299 INFO  L85        PathProgramCache]: Analyzing trace with hash 975309584, now seen corresponding path program 1 times
[2023-11-29 03:06:46,299 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:06:46,300 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242516115]
[2023-11-29 03:06:46,302 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:06:46,302 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:06:47,070 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:06:47,070 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628331614]
[2023-11-29 03:06:47,072 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:06:47,072 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:06:47,072 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:06:47,073 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:06:47,074 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 03:06:55,232 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:06:55,461 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34830 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:06:55,548 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:06:58,290 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 20 proven. 662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:06:58,290 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:06:58,436 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked.
[2023-11-29 03:06:58,436 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:06:58,436 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242516115]
[2023-11-29 03:06:58,436 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:06:58,436 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628331614]
[2023-11-29 03:06:58,436 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [628331614] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:06:58,436 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:06:58,440 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:06:58,440 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695082403]
[2023-11-29 03:06:58,440 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:06:58,443 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:06:58,443 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:06:58,447 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:06:58,447 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:06:58,448 INFO  L87              Difference]: Start difference. First operand 10858 states and 18084 transitions. Second operand  has 5 states, 5 states have (on average 1306.4) internal successors, (6532), 5 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:12,402 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:07:12,402 INFO  L93              Difference]: Finished difference Result 38934 states and 64553 transitions.
[2023-11-29 03:07:12,403 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:07:12,404 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1306.4) internal successors, (6532), 5 states have internal predecessors, (6532), 0 states have call successors, (0), 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 7191
[2023-11-29 03:07:12,409 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:07:12,421 INFO  L225             Difference]: With dead ends: 38934
[2023-11-29 03:07:12,421 INFO  L226             Difference]: Without dead ends: 20484
[2023-11-29 03:07:12,428 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14381 GetRequests, 14372 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:07:12,429 INFO  L413           NwaCegarLoop]: 27033 mSDtfsCounter, 29414 mSDsluCounter, 39234 mSDsCounter, 0 mSdLazyCounter, 17553 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29414 SdHoareTripleChecker+Valid, 66267 SdHoareTripleChecker+Invalid, 18428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 17553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time
[2023-11-29 03:07:12,429 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29414 Valid, 66267 Invalid, 18428 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 17553 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time]
[2023-11-29 03:07:12,446 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20484 states.
[2023-11-29 03:07:12,546 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20484 to 10860.
[2023-11-29 03:07:12,555 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10860 states, 10859 states have (on average 1.665530896030942) internal successors, (18086), 10859 states have internal predecessors, (18086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:12,568 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10860 states to 10860 states and 18086 transitions.
[2023-11-29 03:07:12,568 INFO  L78                 Accepts]: Start accepts. Automaton has 10860 states and 18086 transitions. Word has length 7191
[2023-11-29 03:07:12,572 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:07:12,572 INFO  L495      AbstractCegarLoop]: Abstraction has 10860 states and 18086 transitions.
[2023-11-29 03:07:12,573 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1306.4) internal successors, (6532), 5 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:12,573 INFO  L276                IsEmpty]: Start isEmpty. Operand 10860 states and 18086 transitions.
[2023-11-29 03:07:12,776 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7193
[2023-11-29 03:07:12,776 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:07:12,778 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 03:07:12,874 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-29 03:07:12,978 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-29 03:07:12,978 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:07:12,979 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:07:12,981 INFO  L85        PathProgramCache]: Analyzing trace with hash 1495169268, now seen corresponding path program 1 times
[2023-11-29 03:07:12,981 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:07:12,982 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829325509]
[2023-11-29 03:07:12,982 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:07:12,982 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:07:13,736 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:07:13,736 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353426678]
[2023-11-29 03:07:13,737 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:07:13,737 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:07:13,737 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:07:13,738 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:07:13,739 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 03:07:21,895 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:07:22,100 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34833 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:07:22,178 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:07:26,461 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 22 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:07:26,461 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:07:26,623 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked.
[2023-11-29 03:07:26,623 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:07:26,623 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829325509]
[2023-11-29 03:07:26,623 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:07:26,623 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353426678]
[2023-11-29 03:07:26,623 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [353426678] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:07:26,623 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:07:26,627 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:07:26,627 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731034629]
[2023-11-29 03:07:26,627 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:07:26,630 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:07:26,630 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:07:26,634 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:07:26,634 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:07:26,636 INFO  L87              Difference]: Start difference. First operand 10860 states and 18086 transitions. Second operand  has 5 states, 5 states have (on average 1307.0) internal successors, (6535), 5 states have internal predecessors, (6535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:40,431 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:07:40,431 INFO  L93              Difference]: Finished difference Result 38942 states and 64561 transitions.
[2023-11-29 03:07:40,431 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:07:40,433 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1307.0) internal successors, (6535), 5 states have internal predecessors, (6535), 0 states have call successors, (0), 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 7192
[2023-11-29 03:07:40,438 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:07:40,452 INFO  L225             Difference]: With dead ends: 38942
[2023-11-29 03:07:40,453 INFO  L226             Difference]: Without dead ends: 20485
[2023-11-29 03:07:40,463 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14383 GetRequests, 14374 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:07:40,463 INFO  L413           NwaCegarLoop]: 27025 mSDtfsCounter, 29408 mSDsluCounter, 39224 mSDsCounter, 0 mSdLazyCounter, 17553 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29408 SdHoareTripleChecker+Valid, 66249 SdHoareTripleChecker+Invalid, 18428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 17553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:07:40,463 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29408 Valid, 66249 Invalid, 18428 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 17553 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time]
[2023-11-29 03:07:40,480 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20485 states.
[2023-11-29 03:07:40,731 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20485 to 10862.
[2023-11-29 03:07:40,739 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10862 states, 10861 states have (on average 1.6654083417733174) internal successors, (18088), 10861 states have internal predecessors, (18088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:40,751 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10862 states to 10862 states and 18088 transitions.
[2023-11-29 03:07:40,751 INFO  L78                 Accepts]: Start accepts. Automaton has 10862 states and 18088 transitions. Word has length 7192
[2023-11-29 03:07:40,754 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:07:40,754 INFO  L495      AbstractCegarLoop]: Abstraction has 10862 states and 18088 transitions.
[2023-11-29 03:07:40,755 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1307.0) internal successors, (6535), 5 states have internal predecessors, (6535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:40,755 INFO  L276                IsEmpty]: Start isEmpty. Operand 10862 states and 18088 transitions.
[2023-11-29 03:07:40,952 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7194
[2023-11-29 03:07:40,952 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:07:40,954 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 03:07:41,050 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-29 03:07:41,154 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:07:41,155 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:07:41,155 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:07:41,156 INFO  L85        PathProgramCache]: Analyzing trace with hash 1178458666, now seen corresponding path program 1 times
[2023-11-29 03:07:41,156 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:07:41,156 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834539103]
[2023-11-29 03:07:41,157 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:07:41,157 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:07:41,844 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:07:41,844 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699141040]
[2023-11-29 03:07:41,845 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:07:41,845 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:07:41,845 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:07:41,846 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:07:41,847 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 03:07:49,752 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:07:49,960 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34836 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:07:50,040 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:07:53,057 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 24 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:07:53,058 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:07:53,393 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked.
[2023-11-29 03:07:53,393 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:07:53,393 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834539103]
[2023-11-29 03:07:53,393 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:07:53,393 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699141040]
[2023-11-29 03:07:53,393 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699141040] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:07:53,393 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:07:53,397 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:07:53,397 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151801015]
[2023-11-29 03:07:53,397 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:07:53,400 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:07:53,400 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:07:53,404 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:07:53,404 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:07:53,405 INFO  L87              Difference]: Start difference. First operand 10862 states and 18088 transitions. Second operand  has 5 states, 5 states have (on average 1307.6) internal successors, (6538), 5 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:06,756 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:08:06,756 INFO  L93              Difference]: Finished difference Result 38950 states and 64569 transitions.
[2023-11-29 03:08:06,756 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:08:06,758 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1307.6) internal successors, (6538), 5 states have internal predecessors, (6538), 0 states have call successors, (0), 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 7193
[2023-11-29 03:08:06,763 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:08:06,777 INFO  L225             Difference]: With dead ends: 38950
[2023-11-29 03:08:06,777 INFO  L226             Difference]: Without dead ends: 20486
[2023-11-29 03:08:06,787 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14385 GetRequests, 14376 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:08:06,788 INFO  L413           NwaCegarLoop]: 27017 mSDtfsCounter, 29402 mSDsluCounter, 39214 mSDsCounter, 0 mSdLazyCounter, 17553 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29402 SdHoareTripleChecker+Valid, 66231 SdHoareTripleChecker+Invalid, 18428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 17553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time
[2023-11-29 03:08:06,788 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29402 Valid, 66231 Invalid, 18428 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 17553 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time]
[2023-11-29 03:08:06,805 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20486 states.
[2023-11-29 03:08:06,921 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20486 to 10864.
[2023-11-29 03:08:06,929 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10864 states, 10863 states have (on average 1.6652858326429163) internal successors, (18090), 10863 states have internal predecessors, (18090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:06,941 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10864 states to 10864 states and 18090 transitions.
[2023-11-29 03:08:06,941 INFO  L78                 Accepts]: Start accepts. Automaton has 10864 states and 18090 transitions. Word has length 7193
[2023-11-29 03:08:06,944 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:08:06,944 INFO  L495      AbstractCegarLoop]: Abstraction has 10864 states and 18090 transitions.
[2023-11-29 03:08:06,946 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1307.6) internal successors, (6538), 5 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:06,946 INFO  L276                IsEmpty]: Start isEmpty. Operand 10864 states and 18090 transitions.
[2023-11-29 03:08:07,257 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7195
[2023-11-29 03:08:07,258 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:08:07,260 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 03:08:07,349 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0
[2023-11-29 03:08:07,460 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-29 03:08:07,461 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:08:07,461 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:08:07,463 INFO  L85        PathProgramCache]: Analyzing trace with hash -432976166, now seen corresponding path program 1 times
[2023-11-29 03:08:07,463 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:08:07,463 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479777280]
[2023-11-29 03:08:07,464 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:08:07,465 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:08:08,152 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:08:08,152 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291161840]
[2023-11-29 03:08:08,153 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:08:08,153 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:08:08,154 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:08:08,154 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:08:08,155 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-29 03:08:16,212 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:08:16,421 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34839 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:08:16,502 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:08:19,293 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 26 proven. 656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:08:19,293 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:08:19,450 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked.
[2023-11-29 03:08:19,451 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:08:19,451 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479777280]
[2023-11-29 03:08:19,451 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:08:19,451 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291161840]
[2023-11-29 03:08:19,451 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291161840] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:08:19,451 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:08:19,456 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:08:19,456 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156234198]
[2023-11-29 03:08:19,456 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:08:19,460 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:08:19,460 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:08:19,463 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:08:19,464 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:08:19,465 INFO  L87              Difference]: Start difference. First operand 10864 states and 18090 transitions. Second operand  has 5 states, 5 states have (on average 1308.2) internal successors, (6541), 5 states have internal predecessors, (6541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:31,100 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:08:31,100 INFO  L93              Difference]: Finished difference Result 38958 states and 64577 transitions.
[2023-11-29 03:08:31,100 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:08:31,102 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1308.2) internal successors, (6541), 5 states have internal predecessors, (6541), 0 states have call successors, (0), 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 7194
[2023-11-29 03:08:31,106 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:08:31,121 INFO  L225             Difference]: With dead ends: 38958
[2023-11-29 03:08:31,121 INFO  L226             Difference]: Without dead ends: 20487
[2023-11-29 03:08:31,131 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14387 GetRequests, 14378 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:08:31,131 INFO  L413           NwaCegarLoop]: 27009 mSDtfsCounter, 42793 mSDsluCounter, 25937 mSDsCounter, 0 mSdLazyCounter, 12817 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42793 SdHoareTripleChecker+Valid, 52946 SdHoareTripleChecker+Invalid, 13692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 12817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time
[2023-11-29 03:08:31,132 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42793 Valid, 52946 Invalid, 13692 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 12817 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time]
[2023-11-29 03:08:31,149 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20487 states.
[2023-11-29 03:08:31,249 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20487 to 10866.
[2023-11-29 03:08:31,259 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10866 states, 10865 states have (on average 1.6651633686148182) internal successors, (18092), 10865 states have internal predecessors, (18092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:31,271 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10866 states to 10866 states and 18092 transitions.
[2023-11-29 03:08:31,271 INFO  L78                 Accepts]: Start accepts. Automaton has 10866 states and 18092 transitions. Word has length 7194
[2023-11-29 03:08:31,274 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:08:31,274 INFO  L495      AbstractCegarLoop]: Abstraction has 10866 states and 18092 transitions.
[2023-11-29 03:08:31,276 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1308.2) internal successors, (6541), 5 states have internal predecessors, (6541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:31,276 INFO  L276                IsEmpty]: Start isEmpty. Operand 10866 states and 18092 transitions.
[2023-11-29 03:08:31,593 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7196
[2023-11-29 03:08:31,594 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:08:31,595 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 03:08:31,688 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-29 03:08:31,795 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:08:31,796 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:08:31,797 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:08:31,799 INFO  L85        PathProgramCache]: Analyzing trace with hash 468157638, now seen corresponding path program 1 times
[2023-11-29 03:08:31,799 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:08:31,799 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565241669]
[2023-11-29 03:08:31,799 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:08:31,800 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:08:32,524 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:08:32,524 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265257247]
[2023-11-29 03:08:32,526 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:08:32,526 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:08:32,526 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:08:32,527 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:08:32,527 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-29 03:08:41,296 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:08:41,519 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34843 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:08:41,606 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:08:45,042 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 28 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:08:45,042 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:08:45,206 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked.
[2023-11-29 03:08:45,206 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:08:45,206 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565241669]
[2023-11-29 03:08:45,206 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:08:45,206 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265257247]
[2023-11-29 03:08:45,206 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [265257247] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:08:45,206 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:08:45,210 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:08:45,210 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591085579]
[2023-11-29 03:08:45,210 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:08:45,213 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:08:45,214 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:08:45,217 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:08:45,217 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:08:45,219 INFO  L87              Difference]: Start difference. First operand 10866 states and 18092 transitions. Second operand  has 5 states, 5 states have (on average 1308.8) internal successors, (6544), 5 states have internal predecessors, (6544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:56,828 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:08:56,829 INFO  L93              Difference]: Finished difference Result 38966 states and 64585 transitions.
[2023-11-29 03:08:56,829 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:08:56,830 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1308.8) internal successors, (6544), 5 states have internal predecessors, (6544), 0 states have call successors, (0), 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 7195
[2023-11-29 03:08:56,835 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:08:56,849 INFO  L225             Difference]: With dead ends: 38966
[2023-11-29 03:08:56,849 INFO  L226             Difference]: Without dead ends: 20488
[2023-11-29 03:08:56,859 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14389 GetRequests, 14380 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:08:56,859 INFO  L413           NwaCegarLoop]: 27001 mSDtfsCounter, 42785 mSDsluCounter, 25932 mSDsCounter, 0 mSdLazyCounter, 12817 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42785 SdHoareTripleChecker+Valid, 52933 SdHoareTripleChecker+Invalid, 13692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 12817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time
[2023-11-29 03:08:56,860 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42785 Valid, 52933 Invalid, 13692 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 12817 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time]
[2023-11-29 03:08:56,881 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20488 states.
[2023-11-29 03:08:56,990 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20488 to 10868.
[2023-11-29 03:08:57,001 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10868 states, 10867 states have (on average 1.6650409496641208) internal successors, (18094), 10867 states have internal predecessors, (18094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:57,014 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10868 states to 10868 states and 18094 transitions.
[2023-11-29 03:08:57,015 INFO  L78                 Accepts]: Start accepts. Automaton has 10868 states and 18094 transitions. Word has length 7195
[2023-11-29 03:08:57,018 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:08:57,018 INFO  L495      AbstractCegarLoop]: Abstraction has 10868 states and 18094 transitions.
[2023-11-29 03:08:57,020 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1308.8) internal successors, (6544), 5 states have internal predecessors, (6544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:57,020 INFO  L276                IsEmpty]: Start isEmpty. Operand 10868 states and 18094 transitions.
[2023-11-29 03:08:57,219 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7197
[2023-11-29 03:08:57,220 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:08:57,221 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 03:08:57,319 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-29 03:08:57,421 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:08:57,422 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:08:57,422 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:08:57,423 INFO  L85        PathProgramCache]: Analyzing trace with hash 1215525954, now seen corresponding path program 1 times
[2023-11-29 03:08:57,423 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:08:57,423 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699304693]
[2023-11-29 03:08:57,423 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:08:57,424 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:08:58,152 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:08:58,152 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998922123]
[2023-11-29 03:08:58,153 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:08:58,153 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:08:58,153 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:08:58,154 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:08:58,155 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-29 03:09:06,724 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:09:06,930 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34846 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:09:07,205 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:09:11,000 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 30 proven. 652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:09:11,000 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:09:11,175 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked.
[2023-11-29 03:09:11,175 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:09:11,175 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699304693]
[2023-11-29 03:09:11,175 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:09:11,175 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998922123]
[2023-11-29 03:09:11,175 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [998922123] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:09:11,176 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:09:11,181 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:09:11,181 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150179447]
[2023-11-29 03:09:11,181 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:09:11,184 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:09:11,184 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:09:11,188 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:09:11,188 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:09:11,189 INFO  L87              Difference]: Start difference. First operand 10868 states and 18094 transitions. Second operand  has 5 states, 5 states have (on average 1309.4) internal successors, (6547), 5 states have internal predecessors, (6547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:25,432 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:09:25,432 INFO  L93              Difference]: Finished difference Result 38974 states and 64593 transitions.
[2023-11-29 03:09:25,432 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:09:25,434 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1309.4) internal successors, (6547), 5 states have internal predecessors, (6547), 0 states have call successors, (0), 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 7196
[2023-11-29 03:09:25,439 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:09:25,454 INFO  L225             Difference]: With dead ends: 38974
[2023-11-29 03:09:25,454 INFO  L226             Difference]: Without dead ends: 20489
[2023-11-29 03:09:25,466 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14391 GetRequests, 14382 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:09:25,467 INFO  L413           NwaCegarLoop]: 26993 mSDtfsCounter, 29384 mSDsluCounter, 39184 mSDsCounter, 0 mSdLazyCounter, 17553 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29384 SdHoareTripleChecker+Valid, 66177 SdHoareTripleChecker+Invalid, 18428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 17553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time
[2023-11-29 03:09:25,467 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29384 Valid, 66177 Invalid, 18428 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 17553 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time]
[2023-11-29 03:09:25,488 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20489 states.
[2023-11-29 03:09:25,603 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20489 to 10870.
[2023-11-29 03:09:25,613 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10870 states, 10869 states have (on average 1.66491857576594) internal successors, (18096), 10869 states have internal predecessors, (18096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:25,627 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10870 states to 10870 states and 18096 transitions.
[2023-11-29 03:09:25,627 INFO  L78                 Accepts]: Start accepts. Automaton has 10870 states and 18096 transitions. Word has length 7196
[2023-11-29 03:09:25,631 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:09:25,631 INFO  L495      AbstractCegarLoop]: Abstraction has 10870 states and 18096 transitions.
[2023-11-29 03:09:25,632 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1309.4) internal successors, (6547), 5 states have internal predecessors, (6547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:25,632 INFO  L276                IsEmpty]: Start isEmpty. Operand 10870 states and 18096 transitions.
[2023-11-29 03:09:25,983 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7198
[2023-11-29 03:09:25,983 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:09:25,984 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:09:26,088 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-29 03:09:26,185 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2023-11-29 03:09:26,185 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:09:26,191 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:09:26,192 INFO  L85        PathProgramCache]: Analyzing trace with hash 641363936, now seen corresponding path program 1 times
[2023-11-29 03:09:26,192 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:09:26,192 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522232486]
[2023-11-29 03:09:26,192 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:09:26,193 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:09:26,923 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:09:26,923 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160930105]
[2023-11-29 03:09:26,925 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:09:26,925 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:09:26,926 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:09:26,926 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:09:26,928 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-29 03:09:35,097 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:09:35,322 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34849 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:09:35,405 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:09:38,547 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 32 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:09:38,548 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:09:38,702 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked.
[2023-11-29 03:09:38,702 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:09:38,702 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522232486]
[2023-11-29 03:09:38,702 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:09:38,702 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160930105]
[2023-11-29 03:09:38,702 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160930105] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:09:38,702 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:09:38,706 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:09:38,706 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11218918]
[2023-11-29 03:09:38,706 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:09:38,709 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:09:38,709 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:09:38,712 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:09:38,712 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:09:38,714 INFO  L87              Difference]: Start difference. First operand 10870 states and 18096 transitions. Second operand  has 5 states, 5 states have (on average 1310.0) internal successors, (6550), 5 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:50,722 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:09:50,722 INFO  L93              Difference]: Finished difference Result 38982 states and 64601 transitions.
[2023-11-29 03:09:50,723 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:09:50,725 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1310.0) internal successors, (6550), 5 states have internal predecessors, (6550), 0 states have call successors, (0), 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 7197
[2023-11-29 03:09:50,730 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:09:50,744 INFO  L225             Difference]: With dead ends: 38982
[2023-11-29 03:09:50,744 INFO  L226             Difference]: Without dead ends: 20490
[2023-11-29 03:09:50,755 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14393 GetRequests, 14384 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:09:50,755 INFO  L413           NwaCegarLoop]: 26985 mSDtfsCounter, 42754 mSDsluCounter, 25923 mSDsCounter, 0 mSdLazyCounter, 12817 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42754 SdHoareTripleChecker+Valid, 52908 SdHoareTripleChecker+Invalid, 13692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 12817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time
[2023-11-29 03:09:50,756 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42754 Valid, 52908 Invalid, 13692 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 12817 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time]
[2023-11-29 03:09:50,775 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20490 states.
[2023-11-29 03:09:50,877 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20490 to 10872.
[2023-11-29 03:09:50,886 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10872 states, 10871 states have (on average 1.6647962468954098) internal successors, (18098), 10871 states have internal predecessors, (18098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:51,050 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10872 states to 10872 states and 18098 transitions.
[2023-11-29 03:09:51,051 INFO  L78                 Accepts]: Start accepts. Automaton has 10872 states and 18098 transitions. Word has length 7197
[2023-11-29 03:09:51,054 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:09:51,054 INFO  L495      AbstractCegarLoop]: Abstraction has 10872 states and 18098 transitions.
[2023-11-29 03:09:51,055 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1310.0) internal successors, (6550), 5 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:51,055 INFO  L276                IsEmpty]: Start isEmpty. Operand 10872 states and 18098 transitions.
[2023-11-29 03:09:51,253 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7199
[2023-11-29 03:09:51,254 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:09:51,255 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 03:09:51,352 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-29 03:09:51,455 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21
[2023-11-29 03:09:51,456 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:09:51,457 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:09:51,458 INFO  L85        PathProgramCache]: Analyzing trace with hash 1516113448, now seen corresponding path program 1 times
[2023-11-29 03:09:51,458 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:09:51,458 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718986718]
[2023-11-29 03:09:51,459 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:09:51,459 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:09:52,164 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:09:52,164 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109691880]
[2023-11-29 03:09:52,166 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:09:52,166 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:09:52,166 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:09:52,167 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:09:52,168 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-29 03:10:00,554 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:10:00,773 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34852 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:10:00,854 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:10:03,841 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 34 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:10:03,841 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:10:04,002 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked.
[2023-11-29 03:10:04,002 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:10:04,002 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718986718]
[2023-11-29 03:10:04,002 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:10:04,002 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109691880]
[2023-11-29 03:10:04,002 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109691880] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:10:04,002 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:10:04,006 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:10:04,006 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183620476]
[2023-11-29 03:10:04,006 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:10:04,009 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:10:04,009 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:10:04,012 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:10:04,012 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:10:04,013 INFO  L87              Difference]: Start difference. First operand 10872 states and 18098 transitions. Second operand  has 5 states, 5 states have (on average 1310.6) internal successors, (6553), 5 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:10:17,351 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:10:17,351 INFO  L93              Difference]: Finished difference Result 38990 states and 64609 transitions.
[2023-11-29 03:10:17,351 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:10:17,353 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1310.6) internal successors, (6553), 5 states have internal predecessors, (6553), 0 states have call successors, (0), 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 7198
[2023-11-29 03:10:17,357 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:10:17,367 INFO  L225             Difference]: With dead ends: 38990
[2023-11-29 03:10:17,367 INFO  L226             Difference]: Without dead ends: 20491
[2023-11-29 03:10:17,372 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14395 GetRequests, 14386 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:10:17,372 INFO  L413           NwaCegarLoop]: 26977 mSDtfsCounter, 29388 mSDsluCounter, 38412 mSDsCounter, 0 mSdLazyCounter, 16321 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29388 SdHoareTripleChecker+Valid, 65389 SdHoareTripleChecker+Invalid, 17196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 16321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time
[2023-11-29 03:10:17,373 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29388 Valid, 65389 Invalid, 17196 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 16321 Invalid, 0 Unknown, 0 Unchecked, 12.4s Time]
[2023-11-29 03:10:17,388 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20491 states.
[2023-11-29 03:10:17,475 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20491 to 10874.
[2023-11-29 03:10:17,484 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10874 states, 10873 states have (on average 1.6646739630276832) internal successors, (18100), 10873 states have internal predecessors, (18100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:10:17,497 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10874 states to 10874 states and 18100 transitions.
[2023-11-29 03:10:17,497 INFO  L78                 Accepts]: Start accepts. Automaton has 10874 states and 18100 transitions. Word has length 7198
[2023-11-29 03:10:17,500 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:10:17,500 INFO  L495      AbstractCegarLoop]: Abstraction has 10874 states and 18100 transitions.
[2023-11-29 03:10:17,501 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1310.6) internal successors, (6553), 5 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:10:17,502 INFO  L276                IsEmpty]: Start isEmpty. Operand 10874 states and 18100 transitions.
[2023-11-29 03:10:17,700 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7200
[2023-11-29 03:10:17,700 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:10:17,701 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 03:10:17,800 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0
[2023-11-29 03:10:17,902 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22
[2023-11-29 03:10:17,902 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:10:17,902 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:10:17,903 INFO  L85        PathProgramCache]: Analyzing trace with hash 365118332, now seen corresponding path program 1 times
[2023-11-29 03:10:17,903 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:10:17,903 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259374796]
[2023-11-29 03:10:17,904 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:10:17,904 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:10:18,636 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:10:18,636 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023345746]
[2023-11-29 03:10:18,637 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:10:18,637 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:10:18,637 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:10:18,638 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:10:18,639 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-29 03:10:26,961 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:10:27,192 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34856 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:10:27,280 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:10:30,638 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 36 proven. 646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:10:30,639 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:10:31,004 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked.
[2023-11-29 03:10:31,004 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:10:31,005 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259374796]
[2023-11-29 03:10:31,005 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:10:31,005 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023345746]
[2023-11-29 03:10:31,005 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023345746] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:10:31,005 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:10:31,008 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:10:31,009 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139908169]
[2023-11-29 03:10:31,009 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:10:31,012 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:10:31,012 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:10:31,015 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:10:31,015 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:10:31,016 INFO  L87              Difference]: Start difference. First operand 10874 states and 18100 transitions. Second operand  has 5 states, 5 states have (on average 1311.2) internal successors, (6556), 5 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:10:42,788 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:10:42,788 INFO  L93              Difference]: Finished difference Result 38998 states and 64617 transitions.
[2023-11-29 03:10:42,789 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:10:42,791 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1311.2) internal successors, (6556), 5 states have internal predecessors, (6556), 0 states have call successors, (0), 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 7199
[2023-11-29 03:10:42,798 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:10:42,813 INFO  L225             Difference]: With dead ends: 38998
[2023-11-29 03:10:42,813 INFO  L226             Difference]: Without dead ends: 20492
[2023-11-29 03:10:42,824 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14397 GetRequests, 14388 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:10:42,824 INFO  L413           NwaCegarLoop]: 26969 mSDtfsCounter, 42736 mSDsluCounter, 25913 mSDsCounter, 0 mSdLazyCounter, 12817 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42736 SdHoareTripleChecker+Valid, 52882 SdHoareTripleChecker+Invalid, 13692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 12817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:10:42,825 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42736 Valid, 52882 Invalid, 13692 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 12817 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time]
[2023-11-29 03:10:42,843 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20492 states.
[2023-11-29 03:10:42,950 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20492 to 10876.
[2023-11-29 03:10:42,958 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10876 states, 10875 states have (on average 1.664551724137931) internal successors, (18102), 10875 states have internal predecessors, (18102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:10:42,970 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10876 states to 10876 states and 18102 transitions.
[2023-11-29 03:10:42,970 INFO  L78                 Accepts]: Start accepts. Automaton has 10876 states and 18102 transitions. Word has length 7199
[2023-11-29 03:10:42,973 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:10:42,973 INFO  L495      AbstractCegarLoop]: Abstraction has 10876 states and 18102 transitions.
[2023-11-29 03:10:42,975 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1311.2) internal successors, (6556), 5 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:10:42,975 INFO  L276                IsEmpty]: Start isEmpty. Operand 10876 states and 18102 transitions.
[2023-11-29 03:10:43,289 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7201
[2023-11-29 03:10:43,289 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:10:43,291 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 03:10:43,394 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0
[2023-11-29 03:10:43,491 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23
[2023-11-29 03:10:43,492 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:10:43,493 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:10:43,493 INFO  L85        PathProgramCache]: Analyzing trace with hash -262437744, now seen corresponding path program 1 times
[2023-11-29 03:10:43,493 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:10:43,494 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293371346]
[2023-11-29 03:10:43,495 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:10:43,495 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:10:44,231 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:10:44,231 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802127068]
[2023-11-29 03:10:44,233 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:10:44,233 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:10:44,233 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:10:44,234 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:10:44,235 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-29 03:10:52,026 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:10:52,240 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34859 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:10:52,319 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:10:55,359 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 38 proven. 644 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:10:55,360 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:10:55,541 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked.
[2023-11-29 03:10:55,541 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:10:55,541 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293371346]
[2023-11-29 03:10:55,541 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:10:55,541 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802127068]
[2023-11-29 03:10:55,542 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802127068] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:10:55,542 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:10:55,545 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:10:55,545 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870254055]
[2023-11-29 03:10:55,545 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:10:55,548 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:10:55,548 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:10:55,552 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:10:55,552 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:10:55,553 INFO  L87              Difference]: Start difference. First operand 10876 states and 18102 transitions. Second operand  has 5 states, 5 states have (on average 1311.8) internal successors, (6559), 5 states have internal predecessors, (6559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:11:07,609 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:11:07,609 INFO  L93              Difference]: Finished difference Result 39006 states and 64625 transitions.
[2023-11-29 03:11:07,609 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:11:07,611 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1311.8) internal successors, (6559), 5 states have internal predecessors, (6559), 0 states have call successors, (0), 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 7200
[2023-11-29 03:11:07,615 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:11:07,628 INFO  L225             Difference]: With dead ends: 39006
[2023-11-29 03:11:07,628 INFO  L226             Difference]: Without dead ends: 20493
[2023-11-29 03:11:07,637 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14399 GetRequests, 14390 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:11:07,637 INFO  L413           NwaCegarLoop]: 26961 mSDtfsCounter, 42745 mSDsluCounter, 25907 mSDsCounter, 0 mSdLazyCounter, 12817 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42745 SdHoareTripleChecker+Valid, 52868 SdHoareTripleChecker+Invalid, 13692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 12817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time
[2023-11-29 03:11:07,637 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42745 Valid, 52868 Invalid, 13692 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 12817 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time]
[2023-11-29 03:11:07,655 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20493 states.
[2023-11-29 03:11:07,750 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20493 to 10878.
[2023-11-29 03:11:07,758 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10878 states, 10877 states have (on average 1.6644295302013423) internal successors, (18104), 10877 states have internal predecessors, (18104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:11:07,770 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10878 states to 10878 states and 18104 transitions.
[2023-11-29 03:11:07,770 INFO  L78                 Accepts]: Start accepts. Automaton has 10878 states and 18104 transitions. Word has length 7200
[2023-11-29 03:11:07,774 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:11:07,774 INFO  L495      AbstractCegarLoop]: Abstraction has 10878 states and 18104 transitions.
[2023-11-29 03:11:07,775 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1311.8) internal successors, (6559), 5 states have internal predecessors, (6559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:11:07,775 INFO  L276                IsEmpty]: Start isEmpty. Operand 10878 states and 18104 transitions.
[2023-11-29 03:11:07,974 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7202
[2023-11-29 03:11:07,974 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:11:07,976 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 03:11:08,067 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0
[2023-11-29 03:11:08,176 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24
[2023-11-29 03:11:08,176 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:11:08,177 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:11:08,177 INFO  L85        PathProgramCache]: Analyzing trace with hash 902941334, now seen corresponding path program 1 times
[2023-11-29 03:11:08,177 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:11:08,178 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590973296]
[2023-11-29 03:11:08,178 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:11:08,178 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:11:08,894 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:11:08,895 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802939332]
[2023-11-29 03:11:08,896 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:11:08,896 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:11:08,896 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:11:08,897 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:11:08,898 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-29 03:11:17,539 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:11:17,752 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34862 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:11:17,833 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:11:20,911 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 40 proven. 642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:11:20,911 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:11:21,092 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked.
[2023-11-29 03:11:21,092 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:11:21,092 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590973296]
[2023-11-29 03:11:21,092 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:11:21,092 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802939332]
[2023-11-29 03:11:21,093 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [802939332] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:11:21,093 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:11:21,096 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:11:21,096 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193207691]
[2023-11-29 03:11:21,096 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:11:21,099 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:11:21,100 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:11:21,102 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:11:21,103 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:11:21,105 INFO  L87              Difference]: Start difference. First operand 10878 states and 18104 transitions. Second operand  has 5 states, 5 states have (on average 1312.8) internal successors, (6564), 5 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:11:32,926 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:11:32,926 INFO  L93              Difference]: Finished difference Result 39017 states and 64638 transitions.
[2023-11-29 03:11:32,927 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:11:32,928 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1312.8) internal successors, (6564), 5 states have internal predecessors, (6564), 0 states have call successors, (0), 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 7201
[2023-11-29 03:11:32,933 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:11:32,944 INFO  L225             Difference]: With dead ends: 39017
[2023-11-29 03:11:32,944 INFO  L226             Difference]: Without dead ends: 20497
[2023-11-29 03:11:32,951 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14401 GetRequests, 14392 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:11:32,952 INFO  L413           NwaCegarLoop]: 26948 mSDtfsCounter, 42716 mSDsluCounter, 25902 mSDsCounter, 0 mSdLazyCounter, 12813 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42716 SdHoareTripleChecker+Valid, 52850 SdHoareTripleChecker+Invalid, 13688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 12813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time
[2023-11-29 03:11:32,952 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42716 Valid, 52850 Invalid, 13688 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 12813 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time]
[2023-11-29 03:11:32,971 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20497 states.
[2023-11-29 03:11:33,064 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20497 to 10883.
[2023-11-29 03:11:33,073 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10883 states, 10882 states have (on average 1.6643080316118362) internal successors, (18111), 10882 states have internal predecessors, (18111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:11:33,086 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10883 states to 10883 states and 18111 transitions.
[2023-11-29 03:11:33,087 INFO  L78                 Accepts]: Start accepts. Automaton has 10883 states and 18111 transitions. Word has length 7201
[2023-11-29 03:11:33,090 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:11:33,090 INFO  L495      AbstractCegarLoop]: Abstraction has 10883 states and 18111 transitions.
[2023-11-29 03:11:33,091 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1312.8) internal successors, (6564), 5 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:11:33,091 INFO  L276                IsEmpty]: Start isEmpty. Operand 10883 states and 18111 transitions.
[2023-11-29 03:11:33,290 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7203
[2023-11-29 03:11:33,290 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:11:33,291 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 03:11:33,390 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0
[2023-11-29 03:11:33,492 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25
[2023-11-29 03:11:33,492 INFO  L420      AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:11:33,492 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:11:33,493 INFO  L85        PathProgramCache]: Analyzing trace with hash -2137334182, now seen corresponding path program 1 times
[2023-11-29 03:11:33,493 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:11:33,493 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693619775]
[2023-11-29 03:11:33,494 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:11:33,494 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:11:34,205 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:11:34,205 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711803819]
[2023-11-29 03:11:34,206 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:11:34,206 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:11:34,206 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:11:34,207 INFO  L229       MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:11:34,208 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process
[2023-11-29 03:11:42,540 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:11:42,766 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34866 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:11:42,846 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:11:46,244 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 44 proven. 638 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:11:46,244 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:11:46,424 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked.
[2023-11-29 03:11:46,424 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:11:46,424 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693619775]
[2023-11-29 03:11:46,424 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:11:46,424 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711803819]
[2023-11-29 03:11:46,424 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711803819] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:11:46,425 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:11:46,428 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:11:46,428 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736741720]
[2023-11-29 03:11:46,428 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:11:46,431 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:11:46,431 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:11:46,434 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:11:46,434 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:11:46,436 INFO  L87              Difference]: Start difference. First operand 10883 states and 18111 transitions. Second operand  has 5 states, 5 states have (on average 1313.8) internal successors, (6569), 5 states have internal predecessors, (6569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:11:58,711 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:11:58,711 INFO  L93              Difference]: Finished difference Result 39090 states and 64754 transitions.
[2023-11-29 03:11:58,711 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:11:58,713 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1313.8) internal successors, (6569), 5 states have internal predecessors, (6569), 0 states have call successors, (0), 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 7202
[2023-11-29 03:11:58,717 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:11:58,731 INFO  L225             Difference]: With dead ends: 39090
[2023-11-29 03:11:58,731 INFO  L226             Difference]: Without dead ends: 20501
[2023-11-29 03:11:58,741 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14403 GetRequests, 14394 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:11:58,742 INFO  L413           NwaCegarLoop]: 26935 mSDtfsCounter, 42703 mSDsluCounter, 25896 mSDsCounter, 0 mSdLazyCounter, 12809 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42703 SdHoareTripleChecker+Valid, 52831 SdHoareTripleChecker+Invalid, 13684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 12809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time
[2023-11-29 03:11:58,742 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42703 Valid, 52831 Invalid, 13684 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 12809 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time]
[2023-11-29 03:11:58,761 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20501 states.
[2023-11-29 03:11:58,870 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20501 to 10888.
[2023-11-29 03:11:58,879 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10888 states, 10887 states have (on average 1.6641866446220264) internal successors, (18118), 10887 states have internal predecessors, (18118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:11:58,893 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10888 states to 10888 states and 18118 transitions.
[2023-11-29 03:11:58,893 INFO  L78                 Accepts]: Start accepts. Automaton has 10888 states and 18118 transitions. Word has length 7202
[2023-11-29 03:11:58,896 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:11:58,896 INFO  L495      AbstractCegarLoop]: Abstraction has 10888 states and 18118 transitions.
[2023-11-29 03:11:58,897 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1313.8) internal successors, (6569), 5 states have internal predecessors, (6569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:11:58,898 INFO  L276                IsEmpty]: Start isEmpty. Operand 10888 states and 18118 transitions.
[2023-11-29 03:11:59,096 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7204
[2023-11-29 03:11:59,097 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:11:59,098 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 03:11:59,196 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0
[2023-11-29 03:11:59,298 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26
[2023-11-29 03:11:59,299 INFO  L420      AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:11:59,299 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:11:59,300 INFO  L85        PathProgramCache]: Analyzing trace with hash -806657464, now seen corresponding path program 1 times
[2023-11-29 03:11:59,300 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:11:59,300 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007609219]
[2023-11-29 03:11:59,300 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:11:59,300 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:12:00,020 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:12:00,020 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322668297]
[2023-11-29 03:12:00,021 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:12:00,021 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:12:00,021 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:12:00,022 INFO  L229       MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:12:00,023 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process
[2023-11-29 03:12:08,501 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:12:08,713 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34869 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:12:08,794 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:12:11,955 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 48 proven. 634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:12:11,955 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:12:12,145 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked.
[2023-11-29 03:12:12,145 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:12:12,145 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007609219]
[2023-11-29 03:12:12,145 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:12:12,146 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322668297]
[2023-11-29 03:12:12,146 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [322668297] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:12:12,146 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:12:12,149 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:12:12,149 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13924579]
[2023-11-29 03:12:12,149 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:12:12,152 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:12:12,153 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:12:12,155 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:12:12,156 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:12:12,157 INFO  L87              Difference]: Start difference. First operand 10888 states and 18118 transitions. Second operand  has 5 states, 5 states have (on average 1314.8) internal successors, (6574), 5 states have internal predecessors, (6574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:12:25,724 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:12:25,724 INFO  L93              Difference]: Finished difference Result 39114 states and 64788 transitions.
[2023-11-29 03:12:25,724 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:12:25,726 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1314.8) internal successors, (6574), 5 states have internal predecessors, (6574), 0 states have call successors, (0), 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 7203
[2023-11-29 03:12:25,730 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:12:25,741 INFO  L225             Difference]: With dead ends: 39114
[2023-11-29 03:12:25,741 INFO  L226             Difference]: Without dead ends: 20505
[2023-11-29 03:12:25,746 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14405 GetRequests, 14396 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:12:25,746 INFO  L413           NwaCegarLoop]: 26922 mSDtfsCounter, 29357 mSDsluCounter, 38369 mSDsCounter, 0 mSdLazyCounter, 16309 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29357 SdHoareTripleChecker+Valid, 65291 SdHoareTripleChecker+Invalid, 17184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 16309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time
[2023-11-29 03:12:25,746 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29357 Valid, 65291 Invalid, 17184 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 16309 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time]
[2023-11-29 03:12:25,761 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20505 states.
[2023-11-29 03:12:25,846 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20505 to 10893.
[2023-11-29 03:12:25,854 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10893 states, 10892 states have (on average 1.6640653690782226) internal successors, (18125), 10892 states have internal predecessors, (18125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:12:25,868 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10893 states to 10893 states and 18125 transitions.
[2023-11-29 03:12:25,868 INFO  L78                 Accepts]: Start accepts. Automaton has 10893 states and 18125 transitions. Word has length 7203
[2023-11-29 03:12:25,871 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:12:25,871 INFO  L495      AbstractCegarLoop]: Abstraction has 10893 states and 18125 transitions.
[2023-11-29 03:12:25,873 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1314.8) internal successors, (6574), 5 states have internal predecessors, (6574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:12:25,873 INFO  L276                IsEmpty]: Start isEmpty. Operand 10893 states and 18125 transitions.
[2023-11-29 03:12:26,083 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7205
[2023-11-29 03:12:26,083 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:12:26,085 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 03:12:26,177 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0
[2023-11-29 03:12:26,286 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27
[2023-11-29 03:12:26,286 INFO  L420      AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:12:26,286 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:12:26,287 INFO  L85        PathProgramCache]: Analyzing trace with hash -261771100, now seen corresponding path program 1 times
[2023-11-29 03:12:26,287 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:12:26,287 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337114685]
[2023-11-29 03:12:26,288 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:12:26,288 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:12:27,167 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:12:27,168 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355474613]
[2023-11-29 03:12:27,170 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:12:27,170 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:12:27,170 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:12:27,171 INFO  L229       MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:12:27,172 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process
[2023-11-29 03:12:35,471 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:12:35,725 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34873 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:12:35,809 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:12:38,927 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 52 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:12:38,927 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:12:39,115 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked.
[2023-11-29 03:12:39,116 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:12:39,116 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337114685]
[2023-11-29 03:12:39,116 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:12:39,116 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355474613]
[2023-11-29 03:12:39,116 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [355474613] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:12:39,116 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:12:39,121 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:12:39,121 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661650584]
[2023-11-29 03:12:39,121 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:12:39,124 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:12:39,124 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:12:39,128 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:12:39,128 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:12:39,129 INFO  L87              Difference]: Start difference. First operand 10893 states and 18125 transitions. Second operand  has 5 states, 5 states have (on average 1315.4) internal successors, (6577), 5 states have internal predecessors, (6577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:12:51,228 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:12:51,229 INFO  L93              Difference]: Finished difference Result 39135 states and 64817 transitions.
[2023-11-29 03:12:51,229 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:12:51,230 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1315.4) internal successors, (6577), 5 states have internal predecessors, (6577), 0 states have call successors, (0), 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 7204
[2023-11-29 03:12:51,235 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:12:51,250 INFO  L225             Difference]: With dead ends: 39135
[2023-11-29 03:12:51,250 INFO  L226             Difference]: Without dead ends: 20506
[2023-11-29 03:12:51,262 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14407 GetRequests, 14398 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:12:51,262 INFO  L413           NwaCegarLoop]: 26914 mSDtfsCounter, 42701 mSDsluCounter, 25884 mSDsCounter, 0 mSdLazyCounter, 12805 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42701 SdHoareTripleChecker+Valid, 52798 SdHoareTripleChecker+Invalid, 13680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 12805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time
[2023-11-29 03:12:51,262 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42701 Valid, 52798 Invalid, 13680 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 12805 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time]
[2023-11-29 03:12:51,281 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20506 states.
[2023-11-29 03:12:51,385 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20506 to 10895.
[2023-11-29 03:12:51,395 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10895 states, 10894 states have (on average 1.6639434551129062) internal successors, (18127), 10894 states have internal predecessors, (18127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:12:51,408 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10895 states to 10895 states and 18127 transitions.
[2023-11-29 03:12:51,408 INFO  L78                 Accepts]: Start accepts. Automaton has 10895 states and 18127 transitions. Word has length 7204
[2023-11-29 03:12:51,411 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:12:51,411 INFO  L495      AbstractCegarLoop]: Abstraction has 10895 states and 18127 transitions.
[2023-11-29 03:12:51,412 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1315.4) internal successors, (6577), 5 states have internal predecessors, (6577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:12:51,412 INFO  L276                IsEmpty]: Start isEmpty. Operand 10895 states and 18127 transitions.
[2023-11-29 03:12:51,611 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7206
[2023-11-29 03:12:51,611 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:12:51,613 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:12:51,705 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0
[2023-11-29 03:12:51,813 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28
[2023-11-29 03:12:51,813 INFO  L420      AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:12:51,814 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:12:51,814 INFO  L85        PathProgramCache]: Analyzing trace with hash -70491424, now seen corresponding path program 1 times
[2023-11-29 03:12:51,814 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:12:51,814 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353270465]
[2023-11-29 03:12:51,815 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:12:51,815 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:12:52,525 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:12:52,525 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431885165]
[2023-11-29 03:12:52,526 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:12:52,526 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:12:52,526 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:12:52,527 INFO  L229       MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:12:52,528 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process
[2023-11-29 03:13:00,857 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:13:01,089 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34876 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:13:01,378 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:13:04,598 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 54 proven. 628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:13:04,598 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:13:04,792 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked.
[2023-11-29 03:13:04,792 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:13:04,792 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353270465]
[2023-11-29 03:13:04,793 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:13:04,793 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431885165]
[2023-11-29 03:13:04,793 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431885165] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:13:04,793 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:13:04,796 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:13:04,796 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970509370]
[2023-11-29 03:13:04,797 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:13:04,799 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:13:04,800 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:13:04,802 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:13:04,802 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:13:04,804 INFO  L87              Difference]: Start difference. First operand 10895 states and 18127 transitions. Second operand  has 5 states, 5 states have (on average 1316.4) internal successors, (6582), 5 states have internal predecessors, (6582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:13:18,429 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:13:18,429 INFO  L93              Difference]: Finished difference Result 39146 states and 64830 transitions.
[2023-11-29 03:13:18,430 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:13:18,431 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1316.4) internal successors, (6582), 5 states have internal predecessors, (6582), 0 states have call successors, (0), 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 7205
[2023-11-29 03:13:18,436 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:13:18,454 INFO  L225             Difference]: With dead ends: 39146
[2023-11-29 03:13:18,454 INFO  L226             Difference]: Without dead ends: 20510
[2023-11-29 03:13:18,466 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14409 GetRequests, 14400 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:13:18,467 INFO  L413           NwaCegarLoop]: 26901 mSDtfsCounter, 29322 mSDsluCounter, 39086 mSDsCounter, 0 mSdLazyCounter, 17521 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29322 SdHoareTripleChecker+Valid, 65987 SdHoareTripleChecker+Invalid, 18396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 17521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time
[2023-11-29 03:13:18,467 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29322 Valid, 65987 Invalid, 18396 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 17521 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time]
[2023-11-29 03:13:18,486 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20510 states.
[2023-11-29 03:13:18,733 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20510 to 10900.
[2023-11-29 03:13:18,742 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10900 states, 10899 states have (on average 1.6638223690246812) internal successors, (18134), 10899 states have internal predecessors, (18134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:13:18,755 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10900 states to 10900 states and 18134 transitions.
[2023-11-29 03:13:18,755 INFO  L78                 Accepts]: Start accepts. Automaton has 10900 states and 18134 transitions. Word has length 7205
[2023-11-29 03:13:18,758 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:13:18,758 INFO  L495      AbstractCegarLoop]: Abstraction has 10900 states and 18134 transitions.
[2023-11-29 03:13:18,759 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1316.4) internal successors, (6582), 5 states have internal predecessors, (6582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:13:18,759 INFO  L276                IsEmpty]: Start isEmpty. Operand 10900 states and 18134 transitions.
[2023-11-29 03:13:18,959 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7207
[2023-11-29 03:13:18,959 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:13:18,960 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 03:13:19,057 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0
[2023-11-29 03:13:19,160 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:13:19,161 INFO  L420      AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:13:19,161 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:13:19,163 INFO  L85        PathProgramCache]: Analyzing trace with hash 1514628592, now seen corresponding path program 1 times
[2023-11-29 03:13:19,163 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:13:19,163 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799158327]
[2023-11-29 03:13:19,163 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:13:19,164 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:13:19,885 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:13:19,885 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317724942]
[2023-11-29 03:13:19,886 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:13:19,886 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:13:19,886 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:13:19,887 INFO  L229       MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:13:19,888 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process
[2023-11-29 03:13:28,369 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:13:28,595 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34879 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:13:28,709 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:13:31,800 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 58 proven. 624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:13:31,800 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:13:31,992 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked.
[2023-11-29 03:13:31,993 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:13:31,993 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799158327]
[2023-11-29 03:13:31,993 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:13:31,993 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317724942]
[2023-11-29 03:13:31,993 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [317724942] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:13:31,993 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:13:31,997 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:13:31,997 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529716791]
[2023-11-29 03:13:31,997 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:13:32,000 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:13:32,000 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:13:32,003 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:13:32,003 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:13:32,005 INFO  L87              Difference]: Start difference. First operand 10900 states and 18134 transitions. Second operand  has 5 states, 5 states have (on average 1317.4) internal successors, (6587), 5 states have internal predecessors, (6587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:13:43,802 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:13:43,802 INFO  L93              Difference]: Finished difference Result 39173 states and 64869 transitions.
[2023-11-29 03:13:43,802 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:13:43,804 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1317.4) internal successors, (6587), 5 states have internal predecessors, (6587), 0 states have call successors, (0), 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 7206
[2023-11-29 03:13:43,808 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:13:43,822 INFO  L225             Difference]: With dead ends: 39173
[2023-11-29 03:13:43,822 INFO  L226             Difference]: Without dead ends: 20514
[2023-11-29 03:13:43,832 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14411 GetRequests, 14402 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:13:43,833 INFO  L413           NwaCegarLoop]: 26888 mSDtfsCounter, 42655 mSDsluCounter, 25873 mSDsCounter, 0 mSdLazyCounter, 12797 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42655 SdHoareTripleChecker+Valid, 52761 SdHoareTripleChecker+Invalid, 13672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 12797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:13:43,833 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42655 Valid, 52761 Invalid, 13672 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 12797 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time]
[2023-11-29 03:13:43,855 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20514 states.
[2023-11-29 03:13:43,961 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20514 to 10905.
[2023-11-29 03:13:43,971 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10905 states, 10904 states have (on average 1.6637013939838592) internal successors, (18141), 10904 states have internal predecessors, (18141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:13:43,984 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10905 states to 10905 states and 18141 transitions.
[2023-11-29 03:13:43,984 INFO  L78                 Accepts]: Start accepts. Automaton has 10905 states and 18141 transitions. Word has length 7206
[2023-11-29 03:13:43,987 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:13:43,987 INFO  L495      AbstractCegarLoop]: Abstraction has 10905 states and 18141 transitions.
[2023-11-29 03:13:43,989 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1317.4) internal successors, (6587), 5 states have internal predecessors, (6587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:13:43,989 INFO  L276                IsEmpty]: Start isEmpty. Operand 10905 states and 18141 transitions.
[2023-11-29 03:13:44,187 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7208
[2023-11-29 03:13:44,187 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:13:44,189 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 03:13:44,280 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0
[2023-11-29 03:13:44,389 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30
[2023-11-29 03:13:44,389 INFO  L420      AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:13:44,389 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:13:44,390 INFO  L85        PathProgramCache]: Analyzing trace with hash -1722149228, now seen corresponding path program 1 times
[2023-11-29 03:13:44,390 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:13:44,390 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179020910]
[2023-11-29 03:13:44,391 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:13:44,391 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:13:45,116 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:13:45,116 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545106717]
[2023-11-29 03:13:45,117 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:13:45,117 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:13:45,117 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:13:45,118 INFO  L229       MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:13:45,119 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process
[2023-11-29 03:13:53,687 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:13:53,905 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34882 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:13:53,986 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:13:57,476 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 62 proven. 620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:13:57,477 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:13:57,696 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked.
[2023-11-29 03:13:57,696 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:13:57,696 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179020910]
[2023-11-29 03:13:57,697 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:13:57,697 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545106717]
[2023-11-29 03:13:57,697 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545106717] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:13:57,697 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:13:57,700 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:13:57,700 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139411870]
[2023-11-29 03:13:57,701 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:13:57,703 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:13:57,704 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:13:57,706 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:13:57,706 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:13:57,708 INFO  L87              Difference]: Start difference. First operand 10905 states and 18141 transitions. Second operand  has 5 states, 5 states have (on average 1318.4) internal successors, (6592), 5 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:14:09,794 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:14:09,794 INFO  L93              Difference]: Finished difference Result 39197 states and 64903 transitions.
[2023-11-29 03:14:09,794 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:14:09,796 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1318.4) internal successors, (6592), 5 states have internal predecessors, (6592), 0 states have call successors, (0), 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 7207
[2023-11-29 03:14:09,801 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:14:09,819 INFO  L225             Difference]: With dead ends: 39197
[2023-11-29 03:14:09,819 INFO  L226             Difference]: Without dead ends: 20518
[2023-11-29 03:14:09,831 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14413 GetRequests, 14404 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:14:09,832 INFO  L413           NwaCegarLoop]: 26875 mSDtfsCounter, 42667 mSDsluCounter, 25866 mSDsCounter, 0 mSdLazyCounter, 12793 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42667 SdHoareTripleChecker+Valid, 52741 SdHoareTripleChecker+Invalid, 13668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 12793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time
[2023-11-29 03:14:09,832 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42667 Valid, 52741 Invalid, 13668 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 12793 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time]
[2023-11-29 03:14:09,851 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20518 states.
[2023-11-29 03:14:09,958 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 10910.
[2023-11-29 03:14:09,968 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10910 states, 10909 states have (on average 1.6635805298377486) internal successors, (18148), 10909 states have internal predecessors, (18148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:14:09,981 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10910 states to 10910 states and 18148 transitions.
[2023-11-29 03:14:09,981 INFO  L78                 Accepts]: Start accepts. Automaton has 10910 states and 18148 transitions. Word has length 7207
[2023-11-29 03:14:09,984 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:14:09,985 INFO  L495      AbstractCegarLoop]: Abstraction has 10910 states and 18148 transitions.
[2023-11-29 03:14:09,986 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1318.4) internal successors, (6592), 5 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:14:09,986 INFO  L276                IsEmpty]: Start isEmpty. Operand 10910 states and 18148 transitions.
[2023-11-29 03:14:10,299 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7209
[2023-11-29 03:14:10,299 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:14:10,300 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:14:10,396 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0
[2023-11-29 03:14:10,500 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31
[2023-11-29 03:14:10,501 INFO  L420      AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:14:10,502 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:14:10,503 INFO  L85        PathProgramCache]: Analyzing trace with hash -1371334340, now seen corresponding path program 1 times
[2023-11-29 03:14:10,503 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:14:10,503 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648671984]
[2023-11-29 03:14:10,504 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:14:10,504 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:14:11,213 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:14:11,213 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148857129]
[2023-11-29 03:14:11,215 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:14:11,215 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:14:11,215 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:14:11,216 INFO  L229       MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:14:11,216 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process
[2023-11-29 03:14:19,703 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:14:19,927 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34885 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:14:20,010 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:14:23,396 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 66 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:14:23,397 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:14:23,629 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked.
[2023-11-29 03:14:23,629 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:14:23,629 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648671984]
[2023-11-29 03:14:23,629 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:14:23,629 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148857129]
[2023-11-29 03:14:23,629 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [148857129] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:14:23,629 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:14:23,633 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:14:23,633 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283591491]
[2023-11-29 03:14:23,633 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:14:23,636 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:14:23,636 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:14:23,639 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:14:23,639 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:14:23,640 INFO  L87              Difference]: Start difference. First operand 10910 states and 18148 transitions. Second operand  has 5 states, 5 states have (on average 1319.4) internal successors, (6597), 5 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:14:37,500 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:14:37,500 INFO  L93              Difference]: Finished difference Result 39221 states and 64937 transitions.
[2023-11-29 03:14:37,501 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:14:37,502 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1319.4) internal successors, (6597), 5 states have internal predecessors, (6597), 0 states have call successors, (0), 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 7208
[2023-11-29 03:14:37,507 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:14:37,520 INFO  L225             Difference]: With dead ends: 39221
[2023-11-29 03:14:37,520 INFO  L226             Difference]: Without dead ends: 20522
[2023-11-29 03:14:37,529 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14415 GetRequests, 14406 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:14:37,529 INFO  L413           NwaCegarLoop]: 26862 mSDtfsCounter, 29298 mSDsluCounter, 39050 mSDsCounter, 0 mSdLazyCounter, 17497 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29298 SdHoareTripleChecker+Valid, 65912 SdHoareTripleChecker+Invalid, 18372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 17497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time
[2023-11-29 03:14:37,529 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [29298 Valid, 65912 Invalid, 18372 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [875 Valid, 17497 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time]
[2023-11-29 03:14:37,546 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20522 states.
[2023-11-29 03:14:37,646 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20522 to 10915.
[2023-11-29 03:14:37,656 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10915 states, 10914 states have (on average 1.663459776433938) internal successors, (18155), 10914 states have internal predecessors, (18155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:14:37,668 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10915 states to 10915 states and 18155 transitions.
[2023-11-29 03:14:37,669 INFO  L78                 Accepts]: Start accepts. Automaton has 10915 states and 18155 transitions. Word has length 7208
[2023-11-29 03:14:37,672 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:14:37,672 INFO  L495      AbstractCegarLoop]: Abstraction has 10915 states and 18155 transitions.
[2023-11-29 03:14:37,673 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1319.4) internal successors, (6597), 5 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:14:37,674 INFO  L276                IsEmpty]: Start isEmpty. Operand 10915 states and 18155 transitions.
[2023-11-29 03:14:37,872 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7210
[2023-11-29 03:14:37,873 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:14:37,874 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 03:14:37,968 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0
[2023-11-29 03:14:38,074 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:14:38,075 INFO  L420      AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:14:38,075 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:14:38,076 INFO  L85        PathProgramCache]: Analyzing trace with hash -37475256, now seen corresponding path program 1 times
[2023-11-29 03:14:38,076 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:14:38,076 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612291954]
[2023-11-29 03:14:38,077 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:14:38,077 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:14:38,783 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:14:38,783 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936337369]
[2023-11-29 03:14:38,784 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:14:38,785 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:14:38,785 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:14:38,785 INFO  L229       MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:14:38,786 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1129e2-495f-41e6-a2d9-669b91edd506/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process
[2023-11-29 03:14:46,839 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:14:47,066 INFO  L262         TraceCheckSpWp]: Trace formula consists of 34888 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:14:47,160 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:14:50,326 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 70 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:14:50,326 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:14:50,549 INFO  L134       CoverageAnalysis]: Checked inductivity of 682 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked.
[2023-11-29 03:14:50,549 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:14:50,549 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612291954]
[2023-11-29 03:14:50,549 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:14:50,549 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936337369]
[2023-11-29 03:14:50,549 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [936337369] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:14:50,549 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:14:50,553 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:14:50,553 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774982722]
[2023-11-29 03:14:50,553 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:14:50,556 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:14:50,556 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:14:50,559 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:14:50,559 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:14:50,561 INFO  L87              Difference]: Start difference. First operand 10915 states and 18155 transitions. Second operand  has 5 states, 5 states have (on average 1320.4) internal successors, (6602), 5 states have internal predecessors, (6602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)