./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.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_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/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_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/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_076e99ff-4dae-4552-914f-5d8362b43cf4/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 6a220f8dcff64601b010fb4dfa1a3b29a5a7bd590e68777d73049c21b6b6c169
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-28 20:21:39,713 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-28 20:21:39,782 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-28 20:21:39,788 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-28 20:21:39,788 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-28 20:21:39,816 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-28 20:21:39,817 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-28 20:21:39,818 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-28 20:21:39,819 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-28 20:21:39,819 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-28 20:21:39,820 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-28 20:21:39,820 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-28 20:21:39,821 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-28 20:21:39,822 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-28 20:21:39,822 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-28 20:21:39,823 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-28 20:21:39,823 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-28 20:21:39,824 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-28 20:21:39,824 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-28 20:21:39,825 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-28 20:21:39,825 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-28 20:21:39,826 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-28 20:21:39,826 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-28 20:21:39,827 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-28 20:21:39,827 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-28 20:21:39,828 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-28 20:21:39,828 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-28 20:21:39,829 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-28 20:21:39,829 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 20:21:39,830 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-28 20:21:39,830 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-28 20:21:39,831 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-28 20:21:39,831 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-28 20:21:39,832 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-28 20:21:39,832 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-28 20:21:39,832 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-28 20:21:39,833 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-28 20:21:39,833 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-28 20:21:39,833 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-28 20:21:39,833 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_076e99ff-4dae-4552-914f-5d8362b43cf4/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_076e99ff-4dae-4552-914f-5d8362b43cf4/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 -> 6a220f8dcff64601b010fb4dfa1a3b29a5a7bd590e68777d73049c21b6b6c169
[2023-11-28 20:21:40,083 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-28 20:21:40,115 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-28 20:21:40,118 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-28 20:21:40,119 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-28 20:21:40,120 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-28 20:21:40,121 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop1-back-serstep.c
[2023-11-28 20:21:43,209 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-28 20:21:43,733 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-28 20:21:43,733 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop1-back-serstep.c
[2023-11-28 20:21:43,786 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/data/ac827e6c2/c51785548aba4344ba4557904f3ac4a2/FLAG7219b0156
[2023-11-28 20:21:43,801 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/data/ac827e6c2/c51785548aba4344ba4557904f3ac4a2
[2023-11-28 20:21:43,804 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-28 20:21:43,805 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-28 20:21:43,806 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-28 20:21:43,806 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-28 20:21:43,811 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-28 20:21:43,812 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:43" (1/1) ...
[2023-11-28 20:21:43,813 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c3fc28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:43, skipping insertion in model container
[2023-11-28 20:21:43,814 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:43" (1/1) ...
[2023-11-28 20:21:44,076 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-28 20:21:44,458 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_076e99ff-4dae-4552-914f-5d8362b43cf4/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop1-back-serstep.c[1180,1193]
[2023-11-28 20:21:45,821 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 20:21:45,830 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-28 20:21:45,841 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_076e99ff-4dae-4552-914f-5d8362b43cf4/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.4.prop1-back-serstep.c[1180,1193]
[2023-11-28 20:21:46,704 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 20:21:46,715 INFO  L206         MainTranslator]: Completed translation
[2023-11-28 20:21:46,716 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46 WrapperNode
[2023-11-28 20:21:46,716 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-28 20:21:46,717 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-28 20:21:46,717 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-28 20:21:46,717 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-28 20:21:46,724 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ...
[2023-11-28 20:21:46,969 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ...
[2023-11-28 20:21:50,694 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55698
[2023-11-28 20:21:50,694 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-28 20:21:50,695 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-28 20:21:50,695 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-28 20:21:50,695 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-28 20:21:50,706 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ...
[2023-11-28 20:21:50,707 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ...
[2023-11-28 20:21:51,804 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ...
[2023-11-28 20:21:52,377 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].
[2023-11-28 20:21:52,378 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ...
[2023-11-28 20:21:52,378 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ...
[2023-11-28 20:21:53,241 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ...
[2023-11-28 20:21:53,431 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ...
[2023-11-28 20:21:53,618 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ...
[2023-11-28 20:21:53,779 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ...
[2023-11-28 20:21:54,639 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-28 20:21:54,641 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-28 20:21:54,641 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-28 20:21:54,641 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-28 20:21:54,642 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ...
[2023-11-28 20:21:54,649 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 20:21:54,663 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:21:54,677 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-28 20:21:54,679 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-28 20:21:54,722 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-28 20:21:54,723 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-28 20:21:54,723 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-28 20:21:54,723 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-28 20:21:56,844 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-28 20:21:56,847 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-28 20:22:23,210 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-28 20:22:23,784 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-28 20:22:23,785 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-28 20:22:23,791 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:22:23 BoogieIcfgContainer
[2023-11-28 20:22:23,791 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-28 20:22:23,793 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-28 20:22:23,794 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-28 20:22:23,797 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-28 20:22:23,797 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:21:43" (1/3) ...
[2023-11-28 20:22:23,798 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4930b7ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:22:23, skipping insertion in model container
[2023-11-28 20:22:23,798 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (2/3) ...
[2023-11-28 20:22:23,798 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4930b7ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:22:23, skipping insertion in model container
[2023-11-28 20:22:23,798 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:22:23" (3/3) ...
[2023-11-28 20:22:23,799 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.pgm_protocol.4.prop1-back-serstep.c
[2023-11-28 20:22:23,817 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-28 20:22:23,818 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-28 20:22:24,041 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-28 20:22:24,048 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;@6703b839, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-28 20:22:24,048 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-28 20:22:24,087 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12052 states, 12050 states have (on average 1.6668879668049792) internal successors, (20086), 12051 states have internal predecessors, (20086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:22:24,173 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1255
[2023-11-28 20:22:24,173 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:22:24,175 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:22:24,176 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:22:24,181 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:22:24,182 INFO  L85        PathProgramCache]: Analyzing trace with hash 513727700, now seen corresponding path program 1 times
[2023-11-28 20:22:24,191 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:22:24,192 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286453353]
[2023-11-28 20:22:24,193 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:22:24,194 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:22:25,175 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:22:29,336 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:22:29,337 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:22:29,337 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286453353]
[2023-11-28 20:22:29,338 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286453353] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:22:29,338 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:22:29,339 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:22:29,340 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007477756]
[2023-11-28 20:22:29,341 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:22:29,347 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:22:29,347 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:22:29,374 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:22:29,375 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:22:29,398 INFO  L87              Difference]: Start difference. First operand  has 12052 states, 12050 states have (on average 1.6668879668049792) internal successors, (20086), 12051 states have internal predecessors, (20086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 313.5) internal successors, (1254), 4 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:22:29,958 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:22:29,958 INFO  L93              Difference]: Finished difference Result 23581 states and 39303 transitions.
[2023-11-28 20:22:29,959 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:22:29,961 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 313.5) internal successors, (1254), 4 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1254
[2023-11-28 20:22:29,969 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:22:30,034 INFO  L225             Difference]: With dead ends: 23581
[2023-11-28 20:22:30,034 INFO  L226             Difference]: Without dead ends: 12052
[2023-11-28 20:22:30,052 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
[2023-11-28 20:22:30,055 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 1 mSDsluCounter, 40153 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60232 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:22:30,056 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60232 Invalid, 13 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:22:30,091 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12052 states.
[2023-11-28 20:22:30,316 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12052 to 12052.
[2023-11-28 20:22:30,342 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12052 states, 12051 states have (on average 1.6665836860011618) internal successors, (20084), 12051 states have internal predecessors, (20084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:22:30,379 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12052 states to 12052 states and 20084 transitions.
[2023-11-28 20:22:30,381 INFO  L78                 Accepts]: Start accepts. Automaton has 12052 states and 20084 transitions. Word has length 1254
[2023-11-28 20:22:30,384 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:22:30,384 INFO  L495      AbstractCegarLoop]: Abstraction has 12052 states and 20084 transitions.
[2023-11-28 20:22:30,385 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 313.5) internal successors, (1254), 4 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:22:30,385 INFO  L276                IsEmpty]: Start isEmpty. Operand 12052 states and 20084 transitions.
[2023-11-28 20:22:30,422 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1256
[2023-11-28 20:22:30,422 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:22:30,423 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:22:30,423 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-28 20:22:30,423 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:22:30,424 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:22:30,425 INFO  L85        PathProgramCache]: Analyzing trace with hash -1252578036, now seen corresponding path program 1 times
[2023-11-28 20:22:30,425 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:22:30,425 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157728616]
[2023-11-28 20:22:30,426 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:22:30,426 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:22:31,027 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:22:33,949 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:22:33,950 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:22:33,950 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157728616]
[2023-11-28 20:22:33,950 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157728616] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:22:33,950 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:22:33,951 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:22:33,951 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602775685]
[2023-11-28 20:22:33,951 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:22:33,955 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:22:33,955 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:22:33,957 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:22:33,957 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:22:33,958 INFO  L87              Difference]: Start difference. First operand 12052 states and 20084 transitions. Second operand  has 4 states, 4 states have (on average 313.75) internal successors, (1255), 4 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:22:34,376 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:22:34,376 INFO  L93              Difference]: Finished difference Result 23584 states and 39301 transitions.
[2023-11-28 20:22:34,377 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:22:34,378 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 313.75) internal successors, (1255), 4 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1255
[2023-11-28 20:22:34,379 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:22:34,432 INFO  L225             Difference]: With dead ends: 23584
[2023-11-28 20:22:34,432 INFO  L226             Difference]: Without dead ends: 12055
[2023-11-28 20:22:34,446 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
[2023-11-28 20:22:34,447 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 1 mSDsluCounter, 40151 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60230 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:22:34,448 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60230 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:22:34,468 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12055 states.
[2023-11-28 20:22:34,621 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12055 to 12054.
[2023-11-28 20:22:34,638 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12054 states, 12053 states have (on average 1.6664730772421803) internal successors, (20086), 12053 states have internal predecessors, (20086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:22:34,661 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12054 states to 12054 states and 20086 transitions.
[2023-11-28 20:22:34,661 INFO  L78                 Accepts]: Start accepts. Automaton has 12054 states and 20086 transitions. Word has length 1255
[2023-11-28 20:22:34,662 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:22:34,662 INFO  L495      AbstractCegarLoop]: Abstraction has 12054 states and 20086 transitions.
[2023-11-28 20:22:34,663 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 313.75) internal successors, (1255), 4 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:22:34,663 INFO  L276                IsEmpty]: Start isEmpty. Operand 12054 states and 20086 transitions.
[2023-11-28 20:22:34,673 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1257
[2023-11-28 20:22:34,674 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:22:34,674 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:22:34,675 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-28 20:22:34,675 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:22:34,675 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:22:34,676 INFO  L85        PathProgramCache]: Analyzing trace with hash -385638418, now seen corresponding path program 1 times
[2023-11-28 20:22:34,676 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:22:34,676 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302022892]
[2023-11-28 20:22:34,677 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:22:34,677 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:22:35,139 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:22:37,089 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:22:37,090 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:22:37,090 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302022892]
[2023-11-28 20:22:37,090 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302022892] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:22:37,090 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:22:37,091 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:22:37,091 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350484312]
[2023-11-28 20:22:37,091 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:22:37,093 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:22:37,093 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:22:37,094 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:22:37,094 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:22:37,095 INFO  L87              Difference]: Start difference. First operand 12054 states and 20086 transitions. Second operand  has 5 states, 5 states have (on average 251.2) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:22:37,961 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:22:37,962 INFO  L93              Difference]: Finished difference Result 36456 states and 60751 transitions.
[2023-11-28 20:22:37,962 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:22:37,963 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 251.2) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1256
[2023-11-28 20:22:37,966 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:22:38,011 INFO  L225             Difference]: With dead ends: 36456
[2023-11-28 20:22:38,011 INFO  L226             Difference]: Without dead ends: 24925
[2023-11-28 20:22:38,026 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
[2023-11-28 20:22:38,027 INFO  L413           NwaCegarLoop]: 22323 mSDtfsCounter, 78689 mSDsluCounter, 40152 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78689 SdHoareTripleChecker+Valid, 62475 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:22:38,028 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [78689 Valid, 62475 Invalid, 16 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:22:38,062 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24925 states.
[2023-11-28 20:22:38,320 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24925 to 13403.
[2023-11-28 20:22:38,344 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13403 states, 13402 states have (on average 1.666393075660349) internal successors, (22333), 13402 states have internal predecessors, (22333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:22:38,372 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13403 states to 13403 states and 22333 transitions.
[2023-11-28 20:22:38,372 INFO  L78                 Accepts]: Start accepts. Automaton has 13403 states and 22333 transitions. Word has length 1256
[2023-11-28 20:22:38,374 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:22:38,374 INFO  L495      AbstractCegarLoop]: Abstraction has 13403 states and 22333 transitions.
[2023-11-28 20:22:38,375 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 251.2) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:22:38,375 INFO  L276                IsEmpty]: Start isEmpty. Operand 13403 states and 22333 transitions.
[2023-11-28 20:22:38,785 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8928
[2023-11-28 20:22:38,785 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:22:38,791 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:22:38,792 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-28 20:22:38,792 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:22:38,793 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:22:38,797 INFO  L85        PathProgramCache]: Analyzing trace with hash 1173782582, now seen corresponding path program 1 times
[2023-11-28 20:22:38,797 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:22:38,797 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200525487]
[2023-11-28 20:22:38,799 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:22:38,800 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:22:40,075 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:22:40,075 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573914756]
[2023-11-28 20:22:40,078 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:22:40,078 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:22:40,078 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:22:40,080 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:22:40,086 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-28 20:22:52,722 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:22:53,024 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44664 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:22:53,259 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:22:53,763 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 904 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:22:53,764 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:22:53,764 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:22:53,764 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200525487]
[2023-11-28 20:22:53,764 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:22:53,765 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573914756]
[2023-11-28 20:22:53,765 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [573914756] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:22:53,765 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:22:53,768 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:22:53,769 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835274783]
[2023-11-28 20:22:53,769 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:22:53,784 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:22:53,784 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:22:53,797 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:22:53,798 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:22:53,801 INFO  L87              Difference]: Start difference. First operand 13403 states and 22333 transitions. Second operand  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:22:54,294 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:22:54,294 INFO  L93              Difference]: Finished difference Result 24944 states and 41564 transitions.
[2023-11-28 20:22:54,295 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:22:54,300 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8927
[2023-11-28 20:22:54,305 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:22:54,333 INFO  L225             Difference]: With dead ends: 24944
[2023-11-28 20:22:54,333 INFO  L226             Difference]: Without dead ends: 13413
[2023-11-28 20:22:54,348 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8926 GetRequests, 8924 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:22:54,349 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 12 mSDsluCounter, 40148 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 60227 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:22:54,350 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 60227 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:22:54,375 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13413 states.
[2023-11-28 20:22:54,604 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13413 to 13405.
[2023-11-28 20:22:54,619 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13405 states, 13404 states have (on average 1.6662936436884512) internal successors, (22335), 13404 states have internal predecessors, (22335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:22:54,645 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13405 states to 13405 states and 22335 transitions.
[2023-11-28 20:22:54,646 INFO  L78                 Accepts]: Start accepts. Automaton has 13405 states and 22335 transitions. Word has length 8927
[2023-11-28 20:22:54,651 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:22:54,651 INFO  L495      AbstractCegarLoop]: Abstraction has 13405 states and 22335 transitions.
[2023-11-28 20:22:54,653 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:22:54,654 INFO  L276                IsEmpty]: Start isEmpty. Operand 13405 states and 22335 transitions.
[2023-11-28 20:22:55,449 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8928
[2023-11-28 20:22:55,449 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:22:55,454 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:22:55,565 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-28 20:22:55,655 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:22:55,656 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:22:55,656 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:22:55,660 INFO  L85        PathProgramCache]: Analyzing trace with hash -1451468924, now seen corresponding path program 1 times
[2023-11-28 20:22:55,660 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:22:55,660 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616021197]
[2023-11-28 20:22:55,661 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:22:55,661 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:22:56,844 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:22:56,844 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852510296]
[2023-11-28 20:22:56,846 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:22:56,846 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:22:56,846 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:22:56,847 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:22:56,849 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-28 20:23:08,728 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:23:09,018 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44665 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:23:09,184 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:23:09,502 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 904 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:23:09,503 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:23:09,503 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:23:09,503 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616021197]
[2023-11-28 20:23:09,503 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:23:09,503 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852510296]
[2023-11-28 20:23:09,503 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [852510296] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:23:09,503 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:23:09,507 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:23:09,507 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373596214]
[2023-11-28 20:23:09,507 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:23:09,519 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:23:09,519 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:23:09,527 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:23:09,528 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:23:09,530 INFO  L87              Difference]: Start difference. First operand 13405 states and 22335 transitions. Second operand  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:23:10,097 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:23:10,097 INFO  L93              Difference]: Finished difference Result 24947 states and 41566 transitions.
[2023-11-28 20:23:10,097 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:23:10,100 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8927
[2023-11-28 20:23:10,120 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:23:10,139 INFO  L225             Difference]: With dead ends: 24947
[2023-11-28 20:23:10,140 INFO  L226             Difference]: Without dead ends: 13414
[2023-11-28 20:23:10,150 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8926 GetRequests, 8924 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:23:10,151 INFO  L413           NwaCegarLoop]: 20079 mSDtfsCounter, 12 mSDsluCounter, 40148 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 60227 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:23:10,151 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 60227 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:23:10,169 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13414 states.
[2023-11-28 20:23:10,285 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13414 to 13406.
[2023-11-28 20:23:10,297 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13406 states, 13405 states have (on average 1.6662439388287953) internal successors, (22336), 13405 states have internal predecessors, (22336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:23:10,312 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13406 states to 13406 states and 22336 transitions.
[2023-11-28 20:23:10,313 INFO  L78                 Accepts]: Start accepts. Automaton has 13406 states and 22336 transitions. Word has length 8927
[2023-11-28 20:23:10,317 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:23:10,317 INFO  L495      AbstractCegarLoop]: Abstraction has 13406 states and 22336 transitions.
[2023-11-28 20:23:10,319 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2231.75) internal successors, (8927), 4 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:23:10,319 INFO  L276                IsEmpty]: Start isEmpty. Operand 13406 states and 22336 transitions.
[2023-11-28 20:23:10,623 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8928
[2023-11-28 20:23:10,623 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:23:10,627 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:23:10,733 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-28 20:23:10,828 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:23:10,828 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:23:10,829 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:23:10,833 INFO  L85        PathProgramCache]: Analyzing trace with hash 1255258578, now seen corresponding path program 1 times
[2023-11-28 20:23:10,833 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:23:10,833 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140457616]
[2023-11-28 20:23:10,835 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:23:10,835 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:23:11,793 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:23:11,793 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875503619]
[2023-11-28 20:23:11,796 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:23:11,796 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:23:11,796 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:23:11,797 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:23:11,798 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-28 20:23:23,558 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:23:23,851 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44666 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 20:23:24,017 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:23:25,429 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 6 proven. 671 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked.
[2023-11-28 20:23:25,430 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:23:25,722 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked.
[2023-11-28 20:23:25,722 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:23:25,723 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140457616]
[2023-11-28 20:23:25,723 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:23:25,723 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875503619]
[2023-11-28 20:23:25,723 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [875503619] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:23:25,723 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:23:25,729 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-28 20:23:25,729 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985568011]
[2023-11-28 20:23:25,729 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:23:25,739 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-28 20:23:25,739 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:23:25,747 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-28 20:23:25,747 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-28 20:23:25,750 INFO  L87              Difference]: Start difference. First operand 13406 states and 22336 transitions. Second operand  has 6 states, 6 states have (on average 1338.3333333333333) internal successors, (8030), 6 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:23:53,101 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:23:53,101 INFO  L93              Difference]: Finished difference Result 58324 states and 96778 transitions.
[2023-11-28 20:23:53,101 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-28 20:23:53,103 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1338.3333333333333) internal successors, (8030), 6 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8927
[2023-11-28 20:23:53,114 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:23:53,174 INFO  L225             Difference]: With dead ends: 58324
[2023-11-28 20:23:53,175 INFO  L226             Difference]: Without dead ends: 36467
[2023-11-28 20:23:53,195 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17854 GetRequests, 17842 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182
[2023-11-28 20:23:53,196 INFO  L413           NwaCegarLoop]: 31879 mSDtfsCounter, 85164 mSDsluCounter, 77012 mSDsCounter, 0 mSdLazyCounter, 35796 mSolverCounterSat, 1209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85164 SdHoareTripleChecker+Valid, 108891 SdHoareTripleChecker+Invalid, 37005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1209 IncrementalHoareTripleChecker+Valid, 35796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:23:53,196 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [85164 Valid, 108891 Invalid, 37005 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1209 Valid, 35796 Invalid, 0 Unknown, 0 Unchecked, 26.0s Time]
[2023-11-28 20:23:53,246 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36467 states.
[2023-11-28 20:23:53,461 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36467 to 13406.
[2023-11-28 20:23:53,474 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13406 states, 13405 states have (on average 1.6662439388287953) internal successors, (22336), 13405 states have internal predecessors, (22336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:23:53,496 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13406 states to 13406 states and 22336 transitions.
[2023-11-28 20:23:53,496 INFO  L78                 Accepts]: Start accepts. Automaton has 13406 states and 22336 transitions. Word has length 8927
[2023-11-28 20:23:53,503 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:23:53,503 INFO  L495      AbstractCegarLoop]: Abstraction has 13406 states and 22336 transitions.
[2023-11-28 20:23:53,505 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1338.3333333333333) internal successors, (8030), 6 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:23:53,505 INFO  L276                IsEmpty]: Start isEmpty. Operand 13406 states and 22336 transitions.
[2023-11-28 20:23:53,837 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8929
[2023-11-28 20:23:53,837 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:23:53,841 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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[2023-11-28 20:23:53,956 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-28 20:23:54,042 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:23:54,042 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:23:54,043 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:23:54,046 INFO  L85        PathProgramCache]: Analyzing trace with hash 1858224526, now seen corresponding path program 1 times
[2023-11-28 20:23:54,046 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:23:54,046 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038189541]
[2023-11-28 20:23:54,047 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:23:54,047 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:23:54,998 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:23:54,998 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983556648]
[2023-11-28 20:23:55,000 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:23:55,000 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:23:55,000 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:23:55,001 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:23:55,002 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-28 20:24:06,813 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:24:07,106 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44669 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:24:07,266 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:24:08,368 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 8 proven. 671 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked.
[2023-11-28 20:24:08,368 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:24:08,539 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked.
[2023-11-28 20:24:08,539 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:24:08,539 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038189541]
[2023-11-28 20:24:08,539 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:24:08,539 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983556648]
[2023-11-28 20:24:08,539 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983556648] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:24:08,540 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:24:08,546 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:24:08,546 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417390953]
[2023-11-28 20:24:08,546 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:24:08,553 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:24:08,554 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:24:08,559 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:24:08,559 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:24:08,561 INFO  L87              Difference]: Start difference. First operand 13406 states and 22336 transitions. Second operand  has 5 states, 5 states have (on average 1606.6) internal successors, (8033), 5 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:24:23,399 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:24:23,399 INFO  L93              Difference]: Finished difference Result 46797 states and 77569 transitions.
[2023-11-28 20:24:23,399 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:24:23,401 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1606.6) internal successors, (8033), 5 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8928
[2023-11-28 20:24:23,409 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:24:23,433 INFO  L225             Difference]: With dead ends: 46797
[2023-11-28 20:24:23,433 INFO  L226             Difference]: Without dead ends: 24935
[2023-11-28 20:24:23,449 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17855 GetRequests, 17846 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:24:23,449 INFO  L413           NwaCegarLoop]: 31869 mSDtfsCounter, 50362 mSDsluCounter, 31635 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50362 SdHoareTripleChecker+Valid, 63504 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:24:23,450 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50362 Valid, 63504 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time]
[2023-11-28 20:24:23,477 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24935 states.
[2023-11-28 20:24:23,680 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24935 to 13408.
[2023-11-28 20:24:23,692 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13408 states, 13407 states have (on average 1.6661445513537705) internal successors, (22338), 13407 states have internal predecessors, (22338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:24:23,706 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13408 states to 13408 states and 22338 transitions.
[2023-11-28 20:24:23,707 INFO  L78                 Accepts]: Start accepts. Automaton has 13408 states and 22338 transitions. Word has length 8928
[2023-11-28 20:24:23,711 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:24:23,711 INFO  L495      AbstractCegarLoop]: Abstraction has 13408 states and 22338 transitions.
[2023-11-28 20:24:23,712 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1606.6) internal successors, (8033), 5 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:24:23,712 INFO  L276                IsEmpty]: Start isEmpty. Operand 13408 states and 22338 transitions.
[2023-11-28 20:24:24,041 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8930
[2023-11-28 20:24:24,041 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:24:24,045 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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[2023-11-28 20:24:24,159 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-28 20:24:24,260 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:24:24,260 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:24:24,262 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:24:24,264 INFO  L85        PathProgramCache]: Analyzing trace with hash -1599570194, now seen corresponding path program 1 times
[2023-11-28 20:24:24,265 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:24:24,265 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273829620]
[2023-11-28 20:24:24,265 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:24:24,266 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:24:25,092 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:24:25,092 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091765979]
[2023-11-28 20:24:25,094 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:24:25,095 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:24:25,095 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:24:25,096 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:24:25,096 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-28 20:24:36,608 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:24:36,910 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44673 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:24:37,033 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:24:38,004 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 10 proven. 671 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked.
[2023-11-28 20:24:38,004 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:24:38,161 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked.
[2023-11-28 20:24:38,161 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:24:38,161 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273829620]
[2023-11-28 20:24:38,161 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:24:38,162 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091765979]
[2023-11-28 20:24:38,162 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091765979] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:24:38,162 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:24:38,168 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:24:38,168 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928361038]
[2023-11-28 20:24:38,168 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:24:38,175 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:24:38,175 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:24:38,180 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:24:38,180 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:24:38,182 INFO  L87              Difference]: Start difference. First operand 13408 states and 22338 transitions. Second operand  has 5 states, 5 states have (on average 1607.2) internal successors, (8036), 5 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:24:53,041 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:24:53,041 INFO  L93              Difference]: Finished difference Result 46805 states and 77577 transitions.
[2023-11-28 20:24:53,041 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:24:53,043 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1607.2) internal successors, (8036), 5 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8929
[2023-11-28 20:24:53,049 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:24:53,070 INFO  L225             Difference]: With dead ends: 46805
[2023-11-28 20:24:53,070 INFO  L226             Difference]: Without dead ends: 24936
[2023-11-28 20:24:53,082 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17857 GetRequests, 17848 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:24:53,083 INFO  L413           NwaCegarLoop]: 31861 mSDtfsCounter, 50353 mSDsluCounter, 31630 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50353 SdHoareTripleChecker+Valid, 63491 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:24:53,083 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50353 Valid, 63491 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time]
[2023-11-28 20:24:53,106 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24936 states.
[2023-11-28 20:24:53,260 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24936 to 13410.
[2023-11-28 20:24:53,273 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13410 states, 13409 states have (on average 1.6660451935267357) internal successors, (22340), 13409 states have internal predecessors, (22340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:24:53,307 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13410 states to 13410 states and 22340 transitions.
[2023-11-28 20:24:53,307 INFO  L78                 Accepts]: Start accepts. Automaton has 13410 states and 22340 transitions. Word has length 8929
[2023-11-28 20:24:53,313 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:24:53,313 INFO  L495      AbstractCegarLoop]: Abstraction has 13410 states and 22340 transitions.
[2023-11-28 20:24:53,315 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1607.2) internal successors, (8036), 5 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:24:53,316 INFO  L276                IsEmpty]: Start isEmpty. Operand 13410 states and 22340 transitions.
[2023-11-28 20:24:53,620 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8931
[2023-11-28 20:24:53,621 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:24:53,624 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:24:53,741 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-28 20:24:53,824 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:24:53,825 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:24:53,825 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:24:53,828 INFO  L85        PathProgramCache]: Analyzing trace with hash -667116682, now seen corresponding path program 1 times
[2023-11-28 20:24:53,828 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:24:53,828 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802797040]
[2023-11-28 20:24:53,829 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:24:53,829 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:24:54,693 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:24:54,693 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141463540]
[2023-11-28 20:24:54,695 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:24:54,695 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:24:54,695 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:24:54,696 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:24:54,697 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-28 20:25:06,816 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:25:07,119 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44676 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:25:07,239 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:25:08,227 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 12 proven. 671 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked.
[2023-11-28 20:25:08,227 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:25:08,384 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 892 trivial. 0 not checked.
[2023-11-28 20:25:08,384 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:25:08,384 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802797040]
[2023-11-28 20:25:08,384 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:25:08,385 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141463540]
[2023-11-28 20:25:08,385 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141463540] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:25:08,385 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:25:08,390 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:25:08,390 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914641631]
[2023-11-28 20:25:08,390 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:25:08,399 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:25:08,399 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:25:08,408 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:25:08,408 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:25:08,410 INFO  L87              Difference]: Start difference. First operand 13410 states and 22340 transitions. Second operand  has 5 states, 5 states have (on average 1607.8) internal successors, (8039), 5 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:25:25,470 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:25:25,470 INFO  L93              Difference]: Finished difference Result 46813 states and 77585 transitions.
[2023-11-28 20:25:25,470 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:25:25,472 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1607.8) internal successors, (8039), 5 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8930
[2023-11-28 20:25:25,477 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:25:25,499 INFO  L225             Difference]: With dead ends: 46813
[2023-11-28 20:25:25,499 INFO  L226             Difference]: Without dead ends: 24937
[2023-11-28 20:25:25,508 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17859 GetRequests, 17850 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:25:25,508 INFO  L413           NwaCegarLoop]: 31853 mSDtfsCounter, 34773 mSDsluCounter, 45990 mSDsCounter, 0 mSdLazyCounter, 21636 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34773 SdHoareTripleChecker+Valid, 77843 SdHoareTripleChecker+Invalid, 22842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 21636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time
[2023-11-28 20:25:25,509 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34773 Valid, 77843 Invalid, 22842 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 21636 Invalid, 0 Unknown, 0 Unchecked, 16.2s Time]
[2023-11-28 20:25:25,529 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24937 states.
[2023-11-28 20:25:25,659 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24937 to 13412.
[2023-11-28 20:25:25,670 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13412 states, 13411 states have (on average 1.665945865334427) internal successors, (22342), 13411 states have internal predecessors, (22342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:25:25,683 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13412 states to 13412 states and 22342 transitions.
[2023-11-28 20:25:25,684 INFO  L78                 Accepts]: Start accepts. Automaton has 13412 states and 22342 transitions. Word has length 8930
[2023-11-28 20:25:25,688 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:25:25,688 INFO  L495      AbstractCegarLoop]: Abstraction has 13412 states and 22342 transitions.
[2023-11-28 20:25:25,689 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1607.8) internal successors, (8039), 5 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:25:25,689 INFO  L276                IsEmpty]: Start isEmpty. Operand 13412 states and 22342 transitions.
[2023-11-28 20:25:25,984 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8932
[2023-11-28 20:25:25,984 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:25:25,987 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:25:26,108 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-28 20:25:26,188 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:25:26,188 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:25:26,188 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:25:26,191 INFO  L85        PathProgramCache]: Analyzing trace with hash -1046776568, now seen corresponding path program 1 times
[2023-11-28 20:25:26,191 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:25:26,191 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437802637]
[2023-11-28 20:25:26,192 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:25:26,192 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:25:27,198 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:25:27,198 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291079876]
[2023-11-28 20:25:27,200 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:25:27,200 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:25:27,200 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:25:27,201 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:25:27,202 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-28 20:25:39,401 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:25:39,712 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44679 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:25:39,843 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:25:40,863 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 14 proven. 671 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked.
[2023-11-28 20:25:40,864 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:25:41,034 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked.
[2023-11-28 20:25:41,034 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:25:41,034 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437802637]
[2023-11-28 20:25:41,034 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:25:41,034 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291079876]
[2023-11-28 20:25:41,034 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291079876] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:25:41,034 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:25:41,041 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:25:41,041 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153780039]
[2023-11-28 20:25:41,041 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:25:41,047 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:25:41,047 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:25:41,052 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:25:41,053 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:25:41,055 INFO  L87              Difference]: Start difference. First operand 13412 states and 22342 transitions. Second operand  has 5 states, 5 states have (on average 1608.4) internal successors, (8042), 5 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:25:56,212 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:25:56,212 INFO  L93              Difference]: Finished difference Result 46821 states and 77593 transitions.
[2023-11-28 20:25:56,213 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:25:56,214 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1608.4) internal successors, (8042), 5 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8931
[2023-11-28 20:25:56,223 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:25:56,255 INFO  L225             Difference]: With dead ends: 46821
[2023-11-28 20:25:56,255 INFO  L226             Difference]: Without dead ends: 24938
[2023-11-28 20:25:56,267 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17861 GetRequests, 17852 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:25:56,268 INFO  L413           NwaCegarLoop]: 31845 mSDtfsCounter, 50340 mSDsluCounter, 31619 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50340 SdHoareTripleChecker+Valid, 63464 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time
[2023-11-28 20:25:56,268 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50340 Valid, 63464 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time]
[2023-11-28 20:25:56,292 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24938 states.
[2023-11-28 20:25:56,440 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24938 to 13414.
[2023-11-28 20:25:56,453 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13414 states, 13413 states have (on average 1.6658465667635876) internal successors, (22344), 13413 states have internal predecessors, (22344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:25:56,471 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13414 states to 13414 states and 22344 transitions.
[2023-11-28 20:25:56,471 INFO  L78                 Accepts]: Start accepts. Automaton has 13414 states and 22344 transitions. Word has length 8931
[2023-11-28 20:25:56,476 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:25:56,476 INFO  L495      AbstractCegarLoop]: Abstraction has 13414 states and 22344 transitions.
[2023-11-28 20:25:56,477 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1608.4) internal successors, (8042), 5 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:25:56,478 INFO  L276                IsEmpty]: Start isEmpty. Operand 13414 states and 22344 transitions.
[2023-11-28 20:25:56,781 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8933
[2023-11-28 20:25:56,781 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:25:56,783 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:25:56,926 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-28 20:25:56,983 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:25:56,984 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:25:56,984 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:25:56,986 INFO  L85        PathProgramCache]: Analyzing trace with hash -1187112356, now seen corresponding path program 1 times
[2023-11-28 20:25:56,986 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:25:56,986 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140675657]
[2023-11-28 20:25:56,987 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:25:56,987 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:25:57,858 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:25:57,858 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552985567]
[2023-11-28 20:25:57,860 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:25:57,860 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:25:57,860 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:25:57,861 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:25:57,862 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-28 20:26:10,356 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:26:10,678 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44682 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:26:10,787 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:26:11,825 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 16 proven. 671 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked.
[2023-11-28 20:26:11,825 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:26:11,995 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked.
[2023-11-28 20:26:11,995 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:26:11,995 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140675657]
[2023-11-28 20:26:11,995 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:26:11,995 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552985567]
[2023-11-28 20:26:11,995 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552985567] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:26:11,995 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:26:12,002 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:26:12,002 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839153137]
[2023-11-28 20:26:12,002 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:26:12,008 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:26:12,008 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:26:12,012 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:26:12,012 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:26:12,014 INFO  L87              Difference]: Start difference. First operand 13414 states and 22344 transitions. Second operand  has 5 states, 5 states have (on average 1609.0) internal successors, (8045), 5 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:26:27,567 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:26:27,567 INFO  L93              Difference]: Finished difference Result 46829 states and 77601 transitions.
[2023-11-28 20:26:27,567 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:26:27,569 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1609.0) internal successors, (8045), 5 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8932
[2023-11-28 20:26:27,575 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:26:27,652 INFO  L225             Difference]: With dead ends: 46829
[2023-11-28 20:26:27,653 INFO  L226             Difference]: Without dead ends: 24939
[2023-11-28 20:26:27,668 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17863 GetRequests, 17854 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:26:27,669 INFO  L413           NwaCegarLoop]: 31837 mSDtfsCounter, 50326 mSDsluCounter, 31615 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50326 SdHoareTripleChecker+Valid, 63452 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time
[2023-11-28 20:26:27,669 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50326 Valid, 63452 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time]
[2023-11-28 20:26:27,699 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24939 states.
[2023-11-28 20:26:27,868 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24939 to 13416.
[2023-11-28 20:26:27,880 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13416 states, 13415 states have (on average 1.665747297800969) internal successors, (22346), 13415 states have internal predecessors, (22346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:26:27,900 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13416 states to 13416 states and 22346 transitions.
[2023-11-28 20:26:27,900 INFO  L78                 Accepts]: Start accepts. Automaton has 13416 states and 22346 transitions. Word has length 8932
[2023-11-28 20:26:27,905 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:26:27,905 INFO  L495      AbstractCegarLoop]: Abstraction has 13416 states and 22346 transitions.
[2023-11-28 20:26:27,907 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1609.0) internal successors, (8045), 5 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:26:27,907 INFO  L276                IsEmpty]: Start isEmpty. Operand 13416 states and 22346 transitions.
[2023-11-28 20:26:28,214 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8934
[2023-11-28 20:26:28,215 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:26:28,216 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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[2023-11-28 20:26:28,342 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-28 20:26:28,417 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:26:28,417 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:26:28,418 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:26:28,419 INFO  L85        PathProgramCache]: Analyzing trace with hash 1380082468, now seen corresponding path program 1 times
[2023-11-28 20:26:28,419 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:26:28,419 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002129782]
[2023-11-28 20:26:28,420 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:26:28,420 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:26:29,201 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:26:29,201 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104565272]
[2023-11-28 20:26:29,202 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:26:29,203 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:26:29,203 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:26:29,203 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:26:29,204 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-28 20:26:41,146 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:26:41,475 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44686 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:26:41,648 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:26:42,708 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 18 proven. 671 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked.
[2023-11-28 20:26:42,709 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:26:42,871 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked.
[2023-11-28 20:26:42,872 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:26:42,872 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002129782]
[2023-11-28 20:26:42,872 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:26:42,872 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104565272]
[2023-11-28 20:26:42,872 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104565272] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:26:42,872 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:26:42,877 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:26:42,877 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268820253]
[2023-11-28 20:26:42,877 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:26:42,881 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:26:42,881 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:26:42,885 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:26:42,885 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:26:42,887 INFO  L87              Difference]: Start difference. First operand 13416 states and 22346 transitions. Second operand  has 5 states, 5 states have (on average 1609.6) internal successors, (8048), 5 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:26:57,988 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:26:57,989 INFO  L93              Difference]: Finished difference Result 46837 states and 77609 transitions.
[2023-11-28 20:26:57,989 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:26:57,990 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1609.6) internal successors, (8048), 5 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8933
[2023-11-28 20:26:57,996 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:26:58,017 INFO  L225             Difference]: With dead ends: 46837
[2023-11-28 20:26:58,017 INFO  L226             Difference]: Without dead ends: 24940
[2023-11-28 20:26:58,029 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17865 GetRequests, 17856 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:26:58,030 INFO  L413           NwaCegarLoop]: 31829 mSDtfsCounter, 50317 mSDsluCounter, 31610 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50317 SdHoareTripleChecker+Valid, 63439 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time
[2023-11-28 20:26:58,030 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50317 Valid, 63439 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time]
[2023-11-28 20:26:58,055 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24940 states.
[2023-11-28 20:26:58,205 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24940 to 13418.
[2023-11-28 20:26:58,217 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13418 states, 13417 states have (on average 1.6656480584333309) internal successors, (22348), 13417 states have internal predecessors, (22348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:26:58,233 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13418 states to 13418 states and 22348 transitions.
[2023-11-28 20:26:58,233 INFO  L78                 Accepts]: Start accepts. Automaton has 13418 states and 22348 transitions. Word has length 8933
[2023-11-28 20:26:58,237 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:26:58,237 INFO  L495      AbstractCegarLoop]: Abstraction has 13418 states and 22348 transitions.
[2023-11-28 20:26:58,239 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1609.6) internal successors, (8048), 5 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:26:58,239 INFO  L276                IsEmpty]: Start isEmpty. Operand 13418 states and 22348 transitions.
[2023-11-28 20:26:58,533 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8935
[2023-11-28 20:26:58,533 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:26:58,535 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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[2023-11-28 20:26:58,665 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-28 20:26:58,735 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-28 20:26:58,736 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:26:58,736 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:26:58,739 INFO  L85        PathProgramCache]: Analyzing trace with hash 1033651524, now seen corresponding path program 1 times
[2023-11-28 20:26:58,739 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:26:58,739 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274056551]
[2023-11-28 20:26:58,740 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:26:58,741 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:26:59,818 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:26:59,818 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603354933]
[2023-11-28 20:26:59,820 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:26:59,820 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:26:59,820 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:26:59,821 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:26:59,822 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-28 20:27:11,857 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:27:12,170 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44689 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:27:12,280 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:27:13,392 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 20 proven. 671 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked.
[2023-11-28 20:27:13,392 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:27:13,794 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked.
[2023-11-28 20:27:13,794 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:27:13,794 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274056551]
[2023-11-28 20:27:13,794 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:27:13,794 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603354933]
[2023-11-28 20:27:13,795 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603354933] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:27:13,795 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:27:13,799 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:27:13,799 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110299031]
[2023-11-28 20:27:13,799 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:27:13,804 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:27:13,804 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:27:13,808 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:27:13,808 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:27:13,810 INFO  L87              Difference]: Start difference. First operand 13418 states and 22348 transitions. Second operand  has 5 states, 5 states have (on average 1610.2) internal successors, (8051), 5 states have internal predecessors, (8051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:27:31,529 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:27:31,529 INFO  L93              Difference]: Finished difference Result 46845 states and 77617 transitions.
[2023-11-28 20:27:31,530 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:27:31,531 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1610.2) internal successors, (8051), 5 states have internal predecessors, (8051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8934
[2023-11-28 20:27:31,537 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:27:31,553 INFO  L225             Difference]: With dead ends: 46845
[2023-11-28 20:27:31,554 INFO  L226             Difference]: Without dead ends: 24941
[2023-11-28 20:27:31,561 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17867 GetRequests, 17858 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:27:31,562 INFO  L413           NwaCegarLoop]: 31821 mSDtfsCounter, 34745 mSDsluCounter, 48192 mSDsCounter, 0 mSdLazyCounter, 22512 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34745 SdHoareTripleChecker+Valid, 80013 SdHoareTripleChecker+Invalid, 23718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 22512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time
[2023-11-28 20:27:31,562 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34745 Valid, 80013 Invalid, 23718 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1206 Valid, 22512 Invalid, 0 Unknown, 0 Unchecked, 16.8s Time]
[2023-11-28 20:27:31,582 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24941 states.
[2023-11-28 20:27:31,709 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24941 to 13420.
[2023-11-28 20:27:31,721 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13420 states, 13419 states have (on average 1.6655488486474401) internal successors, (22350), 13419 states have internal predecessors, (22350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:27:31,737 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13420 states to 13420 states and 22350 transitions.
[2023-11-28 20:27:31,737 INFO  L78                 Accepts]: Start accepts. Automaton has 13420 states and 22350 transitions. Word has length 8934
[2023-11-28 20:27:31,741 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:27:31,741 INFO  L495      AbstractCegarLoop]: Abstraction has 13420 states and 22350 transitions.
[2023-11-28 20:27:31,742 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1610.2) internal successors, (8051), 5 states have internal predecessors, (8051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:27:31,743 INFO  L276                IsEmpty]: Start isEmpty. Operand 13420 states and 22350 transitions.
[2023-11-28 20:27:32,036 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8936
[2023-11-28 20:27:32,036 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:27:32,038 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:27:32,167 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-28 20:27:32,238 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-28 20:27:32,239 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:27:32,239 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:27:32,241 INFO  L85        PathProgramCache]: Analyzing trace with hash -1471335106, now seen corresponding path program 1 times
[2023-11-28 20:27:32,241 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:27:32,241 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575777437]
[2023-11-28 20:27:32,243 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:27:32,243 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:27:33,058 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:27:33,058 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179070393]
[2023-11-28 20:27:33,059 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:27:33,060 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:27:33,060 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:27:33,060 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:27:33,062 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-28 20:27:45,575 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:27:45,872 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44692 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:27:45,979 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:27:47,061 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 22 proven. 671 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked.
[2023-11-28 20:27:47,062 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:27:47,218 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked.
[2023-11-28 20:27:47,218 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:27:47,218 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575777437]
[2023-11-28 20:27:47,219 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:27:47,219 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179070393]
[2023-11-28 20:27:47,219 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179070393] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:27:47,219 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:27:47,224 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:27:47,224 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529498914]
[2023-11-28 20:27:47,224 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:27:47,228 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:27:47,228 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:27:47,232 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:27:47,232 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:27:47,234 INFO  L87              Difference]: Start difference. First operand 13420 states and 22350 transitions. Second operand  has 5 states, 5 states have (on average 1610.8) internal successors, (8054), 5 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:04,209 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:28:04,209 INFO  L93              Difference]: Finished difference Result 46853 states and 77625 transitions.
[2023-11-28 20:28:04,209 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:28:04,211 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1610.8) internal successors, (8054), 5 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8935
[2023-11-28 20:28:04,217 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:28:04,238 INFO  L225             Difference]: With dead ends: 46853
[2023-11-28 20:28:04,238 INFO  L226             Difference]: Without dead ends: 24942
[2023-11-28 20:28:04,252 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17869 GetRequests, 17860 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:28:04,252 INFO  L413           NwaCegarLoop]: 31813 mSDtfsCounter, 34748 mSDsluCounter, 45950 mSDsCounter, 0 mSdLazyCounter, 21636 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34748 SdHoareTripleChecker+Valid, 77763 SdHoareTripleChecker+Invalid, 22842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 21636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:28:04,253 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34748 Valid, 77763 Invalid, 22842 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 21636 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time]
[2023-11-28 20:28:04,279 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24942 states.
[2023-11-28 20:28:04,422 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24942 to 13422.
[2023-11-28 20:28:04,434 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13422 states, 13421 states have (on average 1.6654496684300724) internal successors, (22352), 13421 states have internal predecessors, (22352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:04,450 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13422 states to 13422 states and 22352 transitions.
[2023-11-28 20:28:04,451 INFO  L78                 Accepts]: Start accepts. Automaton has 13422 states and 22352 transitions. Word has length 8935
[2023-11-28 20:28:04,456 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:28:04,456 INFO  L495      AbstractCegarLoop]: Abstraction has 13422 states and 22352 transitions.
[2023-11-28 20:28:04,458 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1610.8) internal successors, (8054), 5 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:04,458 INFO  L276                IsEmpty]: Start isEmpty. Operand 13422 states and 22352 transitions.
[2023-11-28 20:28:04,768 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8937
[2023-11-28 20:28:04,768 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:28:04,772 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:28:04,922 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-28 20:28:04,972 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-28 20:28:04,973 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:28:04,973 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:28:04,975 INFO  L85        PathProgramCache]: Analyzing trace with hash 1321519146, now seen corresponding path program 1 times
[2023-11-28 20:28:04,975 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:28:04,975 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734131806]
[2023-11-28 20:28:04,976 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:04,976 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:28:05,801 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:28:05,801 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600390475]
[2023-11-28 20:28:05,804 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:05,804 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:05,804 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:28:05,805 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:28:05,806 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-28 20:28:18,286 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:28:18,619 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44695 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:28:18,754 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:28:19,846 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 24 proven. 671 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked.
[2023-11-28 20:28:19,846 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:28:20,035 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked.
[2023-11-28 20:28:20,036 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:28:20,036 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734131806]
[2023-11-28 20:28:20,036 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:28:20,036 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600390475]
[2023-11-28 20:28:20,036 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600390475] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:28:20,036 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:28:20,043 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:28:20,043 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365566089]
[2023-11-28 20:28:20,043 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:28:20,048 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:28:20,048 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:28:20,052 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:28:20,052 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:28:20,054 INFO  L87              Difference]: Start difference. First operand 13422 states and 22352 transitions. Second operand  has 5 states, 5 states have (on average 1611.4) internal successors, (8057), 5 states have internal predecessors, (8057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:35,790 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:28:35,790 INFO  L93              Difference]: Finished difference Result 46861 states and 77633 transitions.
[2023-11-28 20:28:35,790 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:28:35,792 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1611.4) internal successors, (8057), 5 states have internal predecessors, (8057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8936
[2023-11-28 20:28:35,798 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:28:35,818 INFO  L225             Difference]: With dead ends: 46861
[2023-11-28 20:28:35,818 INFO  L226             Difference]: Without dead ends: 24943
[2023-11-28 20:28:35,831 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17871 GetRequests, 17862 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:28:35,831 INFO  L413           NwaCegarLoop]: 31805 mSDtfsCounter, 50290 mSDsluCounter, 31595 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50290 SdHoareTripleChecker+Valid, 63400 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time
[2023-11-28 20:28:35,831 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50290 Valid, 63400 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time]
[2023-11-28 20:28:35,854 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24943 states.
[2023-11-28 20:28:35,998 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24943 to 13424.
[2023-11-28 20:28:36,011 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13424 states, 13423 states have (on average 1.6653505177680101) internal successors, (22354), 13423 states have internal predecessors, (22354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:36,033 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13424 states to 13424 states and 22354 transitions.
[2023-11-28 20:28:36,034 INFO  L78                 Accepts]: Start accepts. Automaton has 13424 states and 22354 transitions. Word has length 8936
[2023-11-28 20:28:36,039 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:28:36,039 INFO  L495      AbstractCegarLoop]: Abstraction has 13424 states and 22354 transitions.
[2023-11-28 20:28:36,041 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1611.4) internal successors, (8057), 5 states have internal predecessors, (8057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:36,041 INFO  L276                IsEmpty]: Start isEmpty. Operand 13424 states and 22354 transitions.
[2023-11-28 20:28:36,427 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8938
[2023-11-28 20:28:36,427 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:28:36,429 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:28:36,564 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-28 20:28:36,629 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-28 20:28:36,629 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:28:36,631 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:28:36,633 INFO  L85        PathProgramCache]: Analyzing trace with hash -887272358, now seen corresponding path program 1 times
[2023-11-28 20:28:36,633 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:28:36,633 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489775138]
[2023-11-28 20:28:36,635 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:36,635 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:28:37,470 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:28:37,471 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820501045]
[2023-11-28 20:28:37,472 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:37,472 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:37,472 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:28:37,473 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:28:37,474 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-28 20:28:50,072 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:28:50,400 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44699 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:28:50,538 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:28:51,831 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 26 proven. 671 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked.
[2023-11-28 20:28:51,831 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:28:52,012 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 878 trivial. 0 not checked.
[2023-11-28 20:28:52,013 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:28:52,013 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489775138]
[2023-11-28 20:28:52,013 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:28:52,013 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820501045]
[2023-11-28 20:28:52,013 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820501045] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:28:52,013 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:28:52,019 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:28:52,020 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550738408]
[2023-11-28 20:28:52,020 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:28:52,027 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:28:52,028 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:28:52,032 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:28:52,032 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:28:52,034 INFO  L87              Difference]: Start difference. First operand 13424 states and 22354 transitions. Second operand  has 5 states, 5 states have (on average 1612.0) internal successors, (8060), 5 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:09,052 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:29:09,052 INFO  L93              Difference]: Finished difference Result 46869 states and 77641 transitions.
[2023-11-28 20:29:09,053 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:29:09,054 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1612.0) internal successors, (8060), 5 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8937
[2023-11-28 20:29:09,059 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:29:09,077 INFO  L225             Difference]: With dead ends: 46869
[2023-11-28 20:29:09,077 INFO  L226             Difference]: Without dead ends: 24944
[2023-11-28 20:29:09,084 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17873 GetRequests, 17864 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:29:09,085 INFO  L413           NwaCegarLoop]: 31797 mSDtfsCounter, 34738 mSDsluCounter, 45934 mSDsCounter, 0 mSdLazyCounter, 21636 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34738 SdHoareTripleChecker+Valid, 77731 SdHoareTripleChecker+Invalid, 22842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 21636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:29:09,085 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34738 Valid, 77731 Invalid, 22842 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 21636 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time]
[2023-11-28 20:29:09,106 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24944 states.
[2023-11-28 20:29:09,238 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24944 to 13426.
[2023-11-28 20:29:09,250 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13426 states, 13425 states have (on average 1.6652513966480447) internal successors, (22356), 13425 states have internal predecessors, (22356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:09,266 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13426 states to 13426 states and 22356 transitions.
[2023-11-28 20:29:09,267 INFO  L78                 Accepts]: Start accepts. Automaton has 13426 states and 22356 transitions. Word has length 8937
[2023-11-28 20:29:09,271 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:29:09,271 INFO  L495      AbstractCegarLoop]: Abstraction has 13426 states and 22356 transitions.
[2023-11-28 20:29:09,273 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1612.0) internal successors, (8060), 5 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:09,273 INFO  L276                IsEmpty]: Start isEmpty. Operand 13426 states and 22356 transitions.
[2023-11-28 20:29:09,573 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8939
[2023-11-28 20:29:09,573 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:29:09,574 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]
[2023-11-28 20:29:09,707 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-28 20:29:09,775 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-28 20:29:09,775 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:29:09,775 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:29:09,776 INFO  L85        PathProgramCache]: Analyzing trace with hash 5686290, now seen corresponding path program 1 times
[2023-11-28 20:29:09,776 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:29:09,776 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618332906]
[2023-11-28 20:29:09,777 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:09,777 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:29:10,618 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:29:10,618 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54548603]
[2023-11-28 20:29:10,620 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:10,620 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:29:10,620 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:29:10,621 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:29:10,621 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-28 20:29:22,742 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:29:23,045 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44702 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:29:23,160 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:29:24,159 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 28 proven. 671 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked.
[2023-11-28 20:29:24,159 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:29:24,357 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked.
[2023-11-28 20:29:24,357 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:29:24,357 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618332906]
[2023-11-28 20:29:24,357 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:29:24,357 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54548603]
[2023-11-28 20:29:24,358 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [54548603] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:29:24,358 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:29:24,364 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:29:24,364 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585488495]
[2023-11-28 20:29:24,364 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:29:24,368 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:29:24,368 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:29:24,372 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:29:24,373 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:29:24,375 INFO  L87              Difference]: Start difference. First operand 13426 states and 22356 transitions. Second operand  has 5 states, 5 states have (on average 1612.6) internal successors, (8063), 5 states have internal predecessors, (8063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:39,656 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:29:39,656 INFO  L93              Difference]: Finished difference Result 46877 states and 77649 transitions.
[2023-11-28 20:29:39,656 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:29:39,658 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1612.6) internal successors, (8063), 5 states have internal predecessors, (8063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8938
[2023-11-28 20:29:39,664 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:29:39,686 INFO  L225             Difference]: With dead ends: 46877
[2023-11-28 20:29:39,686 INFO  L226             Difference]: Without dead ends: 24945
[2023-11-28 20:29:39,699 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17875 GetRequests, 17866 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:29:39,699 INFO  L413           NwaCegarLoop]: 31789 mSDtfsCounter, 50272 mSDsluCounter, 31585 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50272 SdHoareTripleChecker+Valid, 63374 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time
[2023-11-28 20:29:39,699 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50272 Valid, 63374 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time]
[2023-11-28 20:29:39,724 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24945 states.
[2023-11-28 20:29:39,871 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24945 to 13428.
[2023-11-28 20:29:39,883 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13428 states, 13427 states have (on average 1.6651523050569748) internal successors, (22358), 13427 states have internal predecessors, (22358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:39,900 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13428 states to 13428 states and 22358 transitions.
[2023-11-28 20:29:39,900 INFO  L78                 Accepts]: Start accepts. Automaton has 13428 states and 22358 transitions. Word has length 8938
[2023-11-28 20:29:39,905 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:29:39,905 INFO  L495      AbstractCegarLoop]: Abstraction has 13428 states and 22358 transitions.
[2023-11-28 20:29:39,907 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1612.6) internal successors, (8063), 5 states have internal predecessors, (8063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:39,907 INFO  L276                IsEmpty]: Start isEmpty. Operand 13428 states and 22358 transitions.
[2023-11-28 20:29:40,240 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8940
[2023-11-28 20:29:40,240 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:29:40,242 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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[2023-11-28 20:29:40,379 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-28 20:29:40,442 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-28 20:29:40,443 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:29:40,443 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:29:40,444 INFO  L85        PathProgramCache]: Analyzing trace with hash 2130999924, now seen corresponding path program 1 times
[2023-11-28 20:29:40,444 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:29:40,444 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345830481]
[2023-11-28 20:29:40,445 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:40,445 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:29:41,399 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:29:41,399 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138802452]
[2023-11-28 20:29:41,401 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:41,401 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:29:41,401 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:29:41,402 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:29:41,403 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-28 20:29:53,805 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:29:54,120 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44705 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 20:29:54,243 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:29:55,245 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 30 proven. 671 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked.
[2023-11-28 20:29:55,246 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:29:55,504 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked.
[2023-11-28 20:29:55,505 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:29:55,505 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345830481]
[2023-11-28 20:29:55,505 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:29:55,505 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138802452]
[2023-11-28 20:29:55,505 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138802452] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:29:55,505 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:29:55,510 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-28 20:29:55,510 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163329949]
[2023-11-28 20:29:55,510 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:29:55,514 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-28 20:29:55,514 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:29:55,518 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-28 20:29:55,518 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-28 20:29:55,520 INFO  L87              Difference]: Start difference. First operand 13428 states and 22358 transitions. Second operand  has 6 states, 6 states have (on average 1344.3333333333333) internal successors, (8066), 6 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:24,083 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:30:24,084 INFO  L93              Difference]: Finished difference Result 58473 states and 96949 transitions.
[2023-11-28 20:30:24,084 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-28 20:30:24,085 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1344.3333333333333) internal successors, (8066), 6 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8939
[2023-11-28 20:30:24,091 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:30:24,119 INFO  L225             Difference]: With dead ends: 58473
[2023-11-28 20:30:24,119 INFO  L226             Difference]: Without dead ends: 36534
[2023-11-28 20:30:24,132 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17878 GetRequests, 17866 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182
[2023-11-28 20:30:24,132 INFO  L413           NwaCegarLoop]: 31783 mSDtfsCounter, 69484 mSDsluCounter, 76892 mSDsCounter, 0 mSdLazyCounter, 35796 mSolverCounterSat, 1208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69484 SdHoareTripleChecker+Valid, 108675 SdHoareTripleChecker+Invalid, 37004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1208 IncrementalHoareTripleChecker+Valid, 35796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:30:24,132 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [69484 Valid, 108675 Invalid, 37004 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1208 Valid, 35796 Invalid, 0 Unknown, 0 Unchecked, 27.1s Time]
[2023-11-28 20:30:24,164 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36534 states.
[2023-11-28 20:30:24,333 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36534 to 13430.
[2023-11-28 20:30:24,345 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13430 states, 13429 states have (on average 1.665053242981607) internal successors, (22360), 13429 states have internal predecessors, (22360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:24,361 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13430 states to 13430 states and 22360 transitions.
[2023-11-28 20:30:24,361 INFO  L78                 Accepts]: Start accepts. Automaton has 13430 states and 22360 transitions. Word has length 8939
[2023-11-28 20:30:24,366 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:30:24,366 INFO  L495      AbstractCegarLoop]: Abstraction has 13430 states and 22360 transitions.
[2023-11-28 20:30:24,367 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1344.3333333333333) internal successors, (8066), 6 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:24,367 INFO  L276                IsEmpty]: Start isEmpty. Operand 13430 states and 22360 transitions.
[2023-11-28 20:30:24,698 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8941
[2023-11-28 20:30:24,698 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:30:24,700 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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[2023-11-28 20:30:24,836 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-28 20:30:24,900 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-28 20:30:24,901 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:30:24,901 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:30:24,902 INFO  L85        PathProgramCache]: Analyzing trace with hash 123849464, now seen corresponding path program 1 times
[2023-11-28 20:30:24,902 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:30:24,903 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097110633]
[2023-11-28 20:30:24,903 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:30:24,904 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:30:25,873 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:30:25,873 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954209140]
[2023-11-28 20:30:25,875 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:30:25,875 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:30:25,875 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:30:25,876 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:30:25,877 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-28 20:30:38,169 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:30:38,485 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44708 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:30:38,603 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:30:39,716 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 32 proven. 671 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked.
[2023-11-28 20:30:39,716 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:30:39,912 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked.
[2023-11-28 20:30:39,912 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:30:39,912 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097110633]
[2023-11-28 20:30:39,912 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:30:39,912 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954209140]
[2023-11-28 20:30:39,912 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [954209140] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:30:39,912 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:30:39,919 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:30:39,919 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775598608]
[2023-11-28 20:30:39,919 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:30:39,924 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:30:39,924 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:30:39,927 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:30:39,927 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:30:39,929 INFO  L87              Difference]: Start difference. First operand 13430 states and 22360 transitions. Second operand  has 5 states, 5 states have (on average 1613.8) internal successors, (8069), 5 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:55,934 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:30:55,934 INFO  L93              Difference]: Finished difference Result 46893 states and 77665 transitions.
[2023-11-28 20:30:55,934 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:30:55,936 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1613.8) internal successors, (8069), 5 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8940
[2023-11-28 20:30:55,943 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:30:55,966 INFO  L225             Difference]: With dead ends: 46893
[2023-11-28 20:30:55,966 INFO  L226             Difference]: Without dead ends: 24947
[2023-11-28 20:30:55,980 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17879 GetRequests, 17870 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:30:55,981 INFO  L413           NwaCegarLoop]: 31773 mSDtfsCounter, 50268 mSDsluCounter, 31574 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50268 SdHoareTripleChecker+Valid, 63347 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:30:55,981 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50268 Valid, 63347 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time]
[2023-11-28 20:30:56,007 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24947 states.
[2023-11-28 20:30:56,160 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24947 to 13432.
[2023-11-28 20:30:56,172 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13432 states, 13431 states have (on average 1.6649542104087558) internal successors, (22362), 13431 states have internal predecessors, (22362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:56,189 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13432 states to 13432 states and 22362 transitions.
[2023-11-28 20:30:56,189 INFO  L78                 Accepts]: Start accepts. Automaton has 13432 states and 22362 transitions. Word has length 8940
[2023-11-28 20:30:56,194 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:30:56,194 INFO  L495      AbstractCegarLoop]: Abstraction has 13432 states and 22362 transitions.
[2023-11-28 20:30:56,196 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1613.8) internal successors, (8069), 5 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:56,196 INFO  L276                IsEmpty]: Start isEmpty. Operand 13432 states and 22362 transitions.
[2023-11-28 20:30:56,729 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8942
[2023-11-28 20:30:56,729 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:30:56,731 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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[2023-11-28 20:30:56,869 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-28 20:30:56,932 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:30:56,932 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:30:56,934 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:30:56,935 INFO  L85        PathProgramCache]: Analyzing trace with hash 43432592, now seen corresponding path program 1 times
[2023-11-28 20:30:56,935 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:30:56,935 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133681574]
[2023-11-28 20:30:56,936 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:30:56,936 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:30:57,847 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:30:57,848 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130897287]
[2023-11-28 20:30:57,849 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:30:57,849 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:30:57,850 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:30:57,850 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:30:57,852 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-28 20:31:10,203 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:31:10,520 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44712 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:31:10,639 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:31:11,674 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 34 proven. 671 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked.
[2023-11-28 20:31:11,674 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:31:11,855 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked.
[2023-11-28 20:31:11,856 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:31:11,856 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133681574]
[2023-11-28 20:31:11,856 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:31:11,856 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130897287]
[2023-11-28 20:31:11,856 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130897287] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:31:11,856 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:31:11,861 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:31:11,861 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272115575]
[2023-11-28 20:31:11,861 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:31:11,865 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:31:11,865 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:31:11,869 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:31:11,869 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:31:11,871 INFO  L87              Difference]: Start difference. First operand 13432 states and 22362 transitions. Second operand  has 5 states, 5 states have (on average 1614.4) internal successors, (8072), 5 states have internal predecessors, (8072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:31:29,653 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:31:29,653 INFO  L93              Difference]: Finished difference Result 46901 states and 77673 transitions.
[2023-11-28 20:31:29,653 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:31:29,655 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1614.4) internal successors, (8072), 5 states have internal predecessors, (8072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8941
[2023-11-28 20:31:29,662 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:31:29,685 INFO  L225             Difference]: With dead ends: 46901
[2023-11-28 20:31:29,685 INFO  L226             Difference]: Without dead ends: 24948
[2023-11-28 20:31:29,699 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17881 GetRequests, 17872 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:31:29,700 INFO  L413           NwaCegarLoop]: 31765 mSDtfsCounter, 34703 mSDsluCounter, 48122 mSDsCounter, 0 mSdLazyCounter, 22512 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34703 SdHoareTripleChecker+Valid, 79887 SdHoareTripleChecker+Invalid, 23718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 22512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time
[2023-11-28 20:31:29,700 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34703 Valid, 79887 Invalid, 23718 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 22512 Invalid, 0 Unknown, 0 Unchecked, 16.9s Time]
[2023-11-28 20:31:29,727 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24948 states.
[2023-11-28 20:31:29,877 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24948 to 13434.
[2023-11-28 20:31:29,890 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13434 states, 13433 states have (on average 1.6648552073252438) internal successors, (22364), 13433 states have internal predecessors, (22364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:31:29,907 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13434 states to 13434 states and 22364 transitions.
[2023-11-28 20:31:29,907 INFO  L78                 Accepts]: Start accepts. Automaton has 13434 states and 22364 transitions. Word has length 8941
[2023-11-28 20:31:29,911 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:31:29,912 INFO  L495      AbstractCegarLoop]: Abstraction has 13434 states and 22364 transitions.
[2023-11-28 20:31:29,913 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1614.4) internal successors, (8072), 5 states have internal predecessors, (8072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:31:29,913 INFO  L276                IsEmpty]: Start isEmpty. Operand 13434 states and 22364 transitions.
[2023-11-28 20:31:30,406 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8943
[2023-11-28 20:31:30,406 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:31:30,408 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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[2023-11-28 20:31:30,546 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-28 20:31:30,608 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:31:30,609 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:31:30,610 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:31:30,611 INFO  L85        PathProgramCache]: Analyzing trace with hash -474507296, now seen corresponding path program 1 times
[2023-11-28 20:31:30,611 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:31:30,611 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956122683]
[2023-11-28 20:31:30,612 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:31:30,612 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:31:31,561 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:31:31,561 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341751095]
[2023-11-28 20:31:31,564 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:31:31,564 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:31:31,564 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:31:31,565 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:31:31,568 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-28 20:31:44,112 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:31:44,428 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44715 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:31:44,847 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:31:45,876 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 36 proven. 671 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked.
[2023-11-28 20:31:45,876 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:31:46,055 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked.
[2023-11-28 20:31:46,055 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:31:46,055 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956122683]
[2023-11-28 20:31:46,055 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:31:46,055 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341751095]
[2023-11-28 20:31:46,056 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [341751095] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:31:46,056 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:31:46,060 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:31:46,060 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232250397]
[2023-11-28 20:31:46,060 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:31:46,064 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:31:46,065 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:31:46,068 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:31:46,068 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:31:46,070 INFO  L87              Difference]: Start difference. First operand 13434 states and 22364 transitions. Second operand  has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:32:01,541 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:32:01,541 INFO  L93              Difference]: Finished difference Result 46909 states and 77681 transitions.
[2023-11-28 20:32:01,541 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:32:01,542 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8942
[2023-11-28 20:32:01,548 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:32:01,569 INFO  L225             Difference]: With dead ends: 46909
[2023-11-28 20:32:01,569 INFO  L226             Difference]: Without dead ends: 24949
[2023-11-28 20:32:01,581 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17883 GetRequests, 17874 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:32:01,581 INFO  L413           NwaCegarLoop]: 31757 mSDtfsCounter, 50252 mSDsluCounter, 31564 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50252 SdHoareTripleChecker+Valid, 63321 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time
[2023-11-28 20:32:01,582 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50252 Valid, 63321 Invalid, 18014 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time]
[2023-11-28 20:32:01,604 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24949 states.
[2023-11-28 20:32:01,738 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24949 to 13436.
[2023-11-28 20:32:01,750 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13436 states, 13435 states have (on average 1.664756233717901) internal successors, (22366), 13435 states have internal predecessors, (22366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:32:01,766 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13436 states to 13436 states and 22366 transitions.
[2023-11-28 20:32:01,766 INFO  L78                 Accepts]: Start accepts. Automaton has 13436 states and 22366 transitions. Word has length 8942
[2023-11-28 20:32:01,771 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:32:01,771 INFO  L495      AbstractCegarLoop]: Abstraction has 13436 states and 22366 transitions.
[2023-11-28 20:32:01,772 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:32:01,772 INFO  L276                IsEmpty]: Start isEmpty. Operand 13436 states and 22366 transitions.
[2023-11-28 20:32:02,097 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8944
[2023-11-28 20:32:02,097 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:32:02,098 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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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:32:02,228 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-28 20:32:02,299 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2023-11-28 20:32:02,299 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:32:02,301 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:32:02,302 INFO  L85        PathProgramCache]: Analyzing trace with hash 1058981034, now seen corresponding path program 1 times
[2023-11-28 20:32:02,302 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:32:02,302 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957745061]
[2023-11-28 20:32:02,303 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:32:02,303 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:32:03,114 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:32:03,114 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656917359]
[2023-11-28 20:32:03,116 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:32:03,116 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:32:03,116 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:32:03,117 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:32:03,118 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-28 20:32:15,191 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:32:15,504 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44718 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:32:15,609 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:32:16,549 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 38 proven. 671 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked.
[2023-11-28 20:32:16,549 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:32:16,753 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked.
[2023-11-28 20:32:16,753 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:32:16,753 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957745061]
[2023-11-28 20:32:16,753 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:32:16,753 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656917359]
[2023-11-28 20:32:16,753 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [656917359] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:32:16,753 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:32:16,758 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:32:16,758 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181538156]
[2023-11-28 20:32:16,758 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:32:16,762 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:32:16,762 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:32:16,765 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:32:16,765 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:32:16,766 INFO  L87              Difference]: Start difference. First operand 13436 states and 22366 transitions. Second operand  has 5 states, 5 states have (on average 1615.6) internal successors, (8078), 5 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:32:31,582 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:32:31,583 INFO  L93              Difference]: Finished difference Result 46917 states and 77689 transitions.
[2023-11-28 20:32:31,583 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:32:31,584 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1615.6) internal successors, (8078), 5 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8943
[2023-11-28 20:32:31,591 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:32:31,611 INFO  L225             Difference]: With dead ends: 46917
[2023-11-28 20:32:31,611 INFO  L226             Difference]: Without dead ends: 24950
[2023-11-28 20:32:31,624 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17885 GetRequests, 17876 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:32:31,625 INFO  L413           NwaCegarLoop]: 31749 mSDtfsCounter, 50227 mSDsluCounter, 31560 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50227 SdHoareTripleChecker+Valid, 63309 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time
[2023-11-28 20:32:31,625 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50227 Valid, 63309 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time]
[2023-11-28 20:32:31,650 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24950 states.
[2023-11-28 20:32:31,795 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24950 to 13438.
[2023-11-28 20:32:31,807 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13438 states, 13437 states have (on average 1.6646572895735656) internal successors, (22368), 13437 states have internal predecessors, (22368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:32:31,823 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13438 states to 13438 states and 22368 transitions.
[2023-11-28 20:32:31,824 INFO  L78                 Accepts]: Start accepts. Automaton has 13438 states and 22368 transitions. Word has length 8943
[2023-11-28 20:32:31,828 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:32:31,828 INFO  L495      AbstractCegarLoop]: Abstraction has 13438 states and 22368 transitions.
[2023-11-28 20:32:31,830 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1615.6) internal successors, (8078), 5 states have internal predecessors, (8078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:32:31,830 INFO  L276                IsEmpty]: Start isEmpty. Operand 13438 states and 22368 transitions.
[2023-11-28 20:32:32,159 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8945
[2023-11-28 20:32:32,159 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:32:32,160 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:32:32,290 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0
[2023-11-28 20:32:32,361 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:32:32,361 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:32:32,363 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:32:32,365 INFO  L85        PathProgramCache]: Analyzing trace with hash 2086707910, now seen corresponding path program 1 times
[2023-11-28 20:32:32,365 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:32:32,365 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211678220]
[2023-11-28 20:32:32,366 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:32:32,366 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:32:33,183 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:32:33,184 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100321210]
[2023-11-28 20:32:33,185 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:32:33,185 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:32:33,185 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:32:33,186 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:32:33,187 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-28 20:32:45,134 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:32:45,436 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44721 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:32:45,545 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:32:46,778 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 40 proven. 671 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked.
[2023-11-28 20:32:46,778 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:32:46,965 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked.
[2023-11-28 20:32:46,965 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:32:46,966 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211678220]
[2023-11-28 20:32:46,966 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:32:46,966 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100321210]
[2023-11-28 20:32:46,966 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100321210] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:32:46,966 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:32:46,972 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:32:46,972 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050935274]
[2023-11-28 20:32:46,973 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:32:46,977 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:32:46,977 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:32:46,981 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:32:46,981 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:32:46,983 INFO  L87              Difference]: Start difference. First operand 13438 states and 22368 transitions. Second operand  has 5 states, 5 states have (on average 1616.2) internal successors, (8081), 5 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:33:03,874 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:33:03,874 INFO  L93              Difference]: Finished difference Result 46925 states and 77697 transitions.
[2023-11-28 20:33:03,874 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:33:03,876 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1616.2) internal successors, (8081), 5 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8944
[2023-11-28 20:33:03,882 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:33:03,899 INFO  L225             Difference]: With dead ends: 46925
[2023-11-28 20:33:03,900 INFO  L226             Difference]: Without dead ends: 24951
[2023-11-28 20:33:03,908 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17887 GetRequests, 17878 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:33:03,909 INFO  L413           NwaCegarLoop]: 31741 mSDtfsCounter, 34685 mSDsluCounter, 48092 mSDsCounter, 0 mSdLazyCounter, 22512 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34685 SdHoareTripleChecker+Valid, 79833 SdHoareTripleChecker+Invalid, 23718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 22512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:33:03,909 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34685 Valid, 79833 Invalid, 23718 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 22512 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time]
[2023-11-28 20:33:03,932 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24951 states.
[2023-11-28 20:33:04,061 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24951 to 13440.
[2023-11-28 20:33:04,073 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13440 states, 13439 states have (on average 1.6645583748790833) internal successors, (22370), 13439 states have internal predecessors, (22370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:33:04,090 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13440 states to 13440 states and 22370 transitions.
[2023-11-28 20:33:04,090 INFO  L78                 Accepts]: Start accepts. Automaton has 13440 states and 22370 transitions. Word has length 8944
[2023-11-28 20:33:04,094 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:33:04,094 INFO  L495      AbstractCegarLoop]: Abstraction has 13440 states and 22370 transitions.
[2023-11-28 20:33:04,096 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1616.2) internal successors, (8081), 5 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:33:04,096 INFO  L276                IsEmpty]: Start isEmpty. Operand 13440 states and 22370 transitions.
[2023-11-28 20:33:04,421 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8946
[2023-11-28 20:33:04,422 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:33:04,423 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2023-11-28 20:33:04,552 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0
[2023-11-28 20:33:04,624 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:33:04,624 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:33:04,625 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:33:04,626 INFO  L85        PathProgramCache]: Analyzing trace with hash 692858310, now seen corresponding path program 1 times
[2023-11-28 20:33:04,626 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:33:04,626 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368478784]
[2023-11-28 20:33:04,627 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:33:04,627 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:33:05,456 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:33:05,456 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695149096]
[2023-11-28 20:33:05,458 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:33:05,458 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:33:05,458 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:33:05,459 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:33:05,459 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-28 20:33:17,681 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:33:17,985 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44725 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:33:18,099 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:33:19,208 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 42 proven. 671 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked.
[2023-11-28 20:33:19,208 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:33:19,416 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked.
[2023-11-28 20:33:19,416 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:33:19,416 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368478784]
[2023-11-28 20:33:19,416 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:33:19,417 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695149096]
[2023-11-28 20:33:19,417 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695149096] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:33:19,417 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:33:19,424 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:33:19,424 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756223406]
[2023-11-28 20:33:19,424 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:33:19,429 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:33:19,429 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:33:19,432 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:33:19,433 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:33:19,435 INFO  L87              Difference]: Start difference. First operand 13440 states and 22370 transitions. Second operand  has 5 states, 5 states have (on average 1616.8) internal successors, (8084), 5 states have internal predecessors, (8084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:33:35,040 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:33:35,040 INFO  L93              Difference]: Finished difference Result 46933 states and 77705 transitions.
[2023-11-28 20:33:35,040 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:33:35,042 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1616.8) internal successors, (8084), 5 states have internal predecessors, (8084), 0 states have call successors, (0), 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 8945
[2023-11-28 20:33:35,049 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:33:35,071 INFO  L225             Difference]: With dead ends: 46933
[2023-11-28 20:33:35,071 INFO  L226             Difference]: Without dead ends: 24952
[2023-11-28 20:33:35,084 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17889 GetRequests, 17880 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:33:35,085 INFO  L413           NwaCegarLoop]: 31733 mSDtfsCounter, 50228 mSDsluCounter, 31549 mSDsCounter, 0 mSdLazyCounter, 16808 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50228 SdHoareTripleChecker+Valid, 63282 SdHoareTripleChecker+Invalid, 18014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 16808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time
[2023-11-28 20:33:35,086 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50228 Valid, 63282 Invalid, 18014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 16808 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time]
[2023-11-28 20:33:35,111 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24952 states.
[2023-11-28 20:33:35,256 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24952 to 13442.
[2023-11-28 20:33:35,269 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13442 states, 13441 states have (on average 1.6644594896213079) internal successors, (22372), 13441 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:33:35,285 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13442 states to 13442 states and 22372 transitions.
[2023-11-28 20:33:35,285 INFO  L78                 Accepts]: Start accepts. Automaton has 13442 states and 22372 transitions. Word has length 8945
[2023-11-28 20:33:35,290 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:33:35,290 INFO  L495      AbstractCegarLoop]: Abstraction has 13442 states and 22372 transitions.
[2023-11-28 20:33:35,292 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1616.8) internal successors, (8084), 5 states have internal predecessors, (8084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:33:35,292 INFO  L276                IsEmpty]: Start isEmpty. Operand 13442 states and 22372 transitions.
[2023-11-28 20:33:35,589 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8947
[2023-11-28 20:33:35,589 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:33:35,591 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]
[2023-11-28 20:33:35,711 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0
[2023-11-28 20:33:35,791 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:33:35,791 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:33:35,792 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:33:35,793 INFO  L85        PathProgramCache]: Analyzing trace with hash -330678098, now seen corresponding path program 1 times
[2023-11-28 20:33:35,793 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:33:35,793 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627668937]
[2023-11-28 20:33:35,793 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:33:35,794 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:33:36,686 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:33:36,686 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629433887]
[2023-11-28 20:33:36,688 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:33:36,688 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:33:36,688 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:33:36,689 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:33:36,690 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-28 20:33:48,605 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:33:48,908 INFO  L262         TraceCheckSpWp]: Trace formula consists of 44728 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:33:49,024 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:33:50,045 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 44 proven. 671 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked.
[2023-11-28 20:33:50,045 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:33:50,249 INFO  L134       CoverageAnalysis]: Checked inductivity of 904 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked.
[2023-11-28 20:33:50,249 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:33:50,250 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627668937]
[2023-11-28 20:33:50,250 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:33:50,250 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629433887]
[2023-11-28 20:33:50,250 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [629433887] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:33:50,250 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:33:50,256 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 20:33:50,256 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229079943]
[2023-11-28 20:33:50,256 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:33:50,260 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:33:50,261 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:33:50,264 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:33:50,264 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-28 20:33:50,266 INFO  L87              Difference]: Start difference. First operand 13442 states and 22372 transitions. Second operand  has 5 states, 5 states have (on average 1617.4) internal successors, (8087), 5 states have internal predecessors, (8087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:34:07,966 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:34:07,966 INFO  L93              Difference]: Finished difference Result 46941 states and 77713 transitions.
[2023-11-28 20:34:07,966 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:34:07,968 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1617.4) internal successors, (8087), 5 states have internal predecessors, (8087), 0 states have call successors, (0), 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 8946
[2023-11-28 20:34:07,975 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:34:07,997 INFO  L225             Difference]: With dead ends: 46941
[2023-11-28 20:34:07,997 INFO  L226             Difference]: Without dead ends: 24953
[2023-11-28 20:34:08,009 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17891 GetRequests, 17882 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:34:08,010 INFO  L413           NwaCegarLoop]: 31725 mSDtfsCounter, 34673 mSDsluCounter, 48072 mSDsCounter, 0 mSdLazyCounter, 22512 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34673 SdHoareTripleChecker+Valid, 79797 SdHoareTripleChecker+Invalid, 23718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 22512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time
[2023-11-28 20:34:08,011 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34673 Valid, 79797 Invalid, 23718 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1206 Valid, 22512 Invalid, 0 Unknown, 0 Unchecked, 16.8s Time]
[2023-11-28 20:34:08,036 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24953 states.
[2023-11-28 20:34:08,184 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24953 to 13444.
[2023-11-28 20:34:08,197 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13444 states, 13443 states have (on average 1.664360633787101) internal successors, (22374), 13443 states have internal predecessors, (22374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:34:08,213 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13444 states to 13444 states and 22374 transitions.
[2023-11-28 20:34:08,214 INFO  L78                 Accepts]: Start accepts. Automaton has 13444 states and 22374 transitions. Word has length 8946
[2023-11-28 20:34:08,218 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:34:08,218 INFO  L495      AbstractCegarLoop]: Abstraction has 13444 states and 22374 transitions.
[2023-11-28 20:34:08,220 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1617.4) internal successors, (8087), 5 states have internal predecessors, (8087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:34:08,220 INFO  L276                IsEmpty]: Start isEmpty. Operand 13444 states and 22374 transitions.
[2023-11-28 20:34:08,517 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8948
[2023-11-28 20:34:08,517 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:34:08,519 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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[2023-11-28 20:34:08,645 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0
[2023-11-28 20:34:08,719 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24
[2023-11-28 20:34:08,720 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:34:08,720 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:34:08,721 INFO  L85        PathProgramCache]: Analyzing trace with hash -1153854496, now seen corresponding path program 1 times
[2023-11-28 20:34:08,721 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:34:08,721 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653066827]
[2023-11-28 20:34:08,722 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:34:08,722 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:34:09,711 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:34:09,711 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564918703]
[2023-11-28 20:34:09,713 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:34:09,713 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:34:09,713 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:34:09,714 INFO  L229       MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:34:09,715 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e99ff-4dae-4552-914f-5d8362b43cf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process