./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label57.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 527bcce2
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_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label57.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx --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 32bit --witnessprinter.graph.data.programhash 0de0fd0b8cb0cee609d45117c8166ea2b32bbf1ee23893cc14af47ce8649a66b
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-527bcce
[2023-11-21 22:25:54,874 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-21 22:25:55,014 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-21 22:25:55,019 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-21 22:25:55,028 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-21 22:25:55,096 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-21 22:25:55,098 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-21 22:25:55,099 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-21 22:25:55,100 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-21 22:25:55,107 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-21 22:25:55,107 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-21 22:25:55,109 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-21 22:25:55,110 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-21 22:25:55,112 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-21 22:25:55,113 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-21 22:25:55,114 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-21 22:25:55,114 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-21 22:25:55,115 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-11-21 22:25:55,116 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-21 22:25:55,116 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-11-21 22:25:55,117 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-21 22:25:55,118 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-21 22:25:55,118 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-21 22:25:55,119 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-21 22:25:55,120 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-11-21 22:25:55,120 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-21 22:25:55,121 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-21 22:25:55,144 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-21 22:25:55,145 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-21 22:25:55,145 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-21 22:25:55,146 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-21 22:25:55,146 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-21 22:25:55,147 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-21 22:25:55,147 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-21 22:25:55,148 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-21 22:25:55,148 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-21 22:25:55,148 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-21 22:25:55,148 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-21 22:25:55,149 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-21 22:25:55,149 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-21 22:25:55,149 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-21 22:25:55,151 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-21 22:25:55,151 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_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/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_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx
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 -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0de0fd0b8cb0cee609d45117c8166ea2b32bbf1ee23893cc14af47ce8649a66b
[2023-11-21 22:25:55,533 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-21 22:25:55,565 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-21 22:25:55,568 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-21 22:25:55,570 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-21 22:25:55,573 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-21 22:25:55,575 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/eca-rers2012/Problem03_label57.c
[2023-11-21 22:25:58,966 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-21 22:25:59,442 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-21 22:25:59,443 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/sv-benchmarks/c/eca-rers2012/Problem03_label57.c
[2023-11-21 22:25:59,466 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/data/35a006ce1/87ef22c7a1cf4da5b80ec10cdf855ca8/FLAGb20fd94a9
[2023-11-21 22:25:59,485 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/data/35a006ce1/87ef22c7a1cf4da5b80ec10cdf855ca8
[2023-11-21 22:25:59,487 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-21 22:25:59,489 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-21 22:25:59,490 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-21 22:25:59,490 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-21 22:25:59,497 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-21 22:25:59,497 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:25:59" (1/1) ...
[2023-11-21 22:25:59,498 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b966a00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:25:59, skipping insertion in model container
[2023-11-21 22:25:59,499 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:25:59" (1/1) ...
[2023-11-21 22:25:59,580 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-21 22:26:00,178 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_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/sv-benchmarks/c/eca-rers2012/Problem03_label57.c[55951,55964]
[2023-11-21 22:26:00,227 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-21 22:26:00,249 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-21 22:26:00,493 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_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/sv-benchmarks/c/eca-rers2012/Problem03_label57.c[55951,55964]
[2023-11-21 22:26:00,511 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-21 22:26:00,534 INFO  L206         MainTranslator]: Completed translation
[2023-11-21 22:26:00,535 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:00 WrapperNode
[2023-11-21 22:26:00,535 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-21 22:26:00,536 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-21 22:26:00,536 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-21 22:26:00,536 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-21 22:26:00,544 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:00" (1/1) ...
[2023-11-21 22:26:00,593 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:00" (1/1) ...
[2023-11-21 22:26:00,772 INFO  L138                Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772
[2023-11-21 22:26:00,786 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-21 22:26:00,787 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-21 22:26:00,787 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-21 22:26:00,787 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-21 22:26:00,799 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:00" (1/1) ...
[2023-11-21 22:26:00,799 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:00" (1/1) ...
[2023-11-21 22:26:00,809 INFO  L184        PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:00" (1/1) ...
[2023-11-21 22:26:00,852 INFO  L187           HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2]
[2023-11-21 22:26:00,853 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:00" (1/1) ...
[2023-11-21 22:26:00,853 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:00" (1/1) ...
[2023-11-21 22:26:00,917 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:00" (1/1) ...
[2023-11-21 22:26:00,931 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:00" (1/1) ...
[2023-11-21 22:26:00,942 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:00" (1/1) ...
[2023-11-21 22:26:00,955 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:00" (1/1) ...
[2023-11-21 22:26:00,992 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-21 22:26:00,994 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-21 22:26:00,995 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-21 22:26:00,996 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-21 22:26:00,997 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:00" (1/1) ...
[2023-11-21 22:26:01,003 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-21 22:26:01,015 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:26:01,030 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-21 22:26:01,067 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-21 22:26:01,076 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-21 22:26:01,077 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-21 22:26:01,077 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-21 22:26:01,077 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-21 22:26:01,169 INFO  L240             CfgBuilder]: Building ICFG
[2023-11-21 22:26:01,172 INFO  L266             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-21 22:26:03,202 INFO  L281             CfgBuilder]: Performing block encoding
[2023-11-21 22:26:03,858 INFO  L303             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-21 22:26:03,859 INFO  L308             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-21 22:26:03,861 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:26:03 BoogieIcfgContainer
[2023-11-21 22:26:03,861 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-21 22:26:03,863 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-21 22:26:03,863 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-21 22:26:03,867 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-21 22:26:03,867 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:25:59" (1/3) ...
[2023-11-21 22:26:03,868 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbd5bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:26:03, skipping insertion in model container
[2023-11-21 22:26:03,868 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:00" (2/3) ...
[2023-11-21 22:26:03,868 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbd5bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:26:03, skipping insertion in model container
[2023-11-21 22:26:03,869 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:26:03" (3/3) ...
[2023-11-21 22:26:03,870 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem03_label57.c
[2023-11-21 22:26:03,890 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-21 22:26:03,890 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-21 22:26:03,948 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-21 22:26:03,957 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;@5057f880, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-21 22:26:03,957 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-21 22:26:03,966 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:03,986 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 144
[2023-11-21 22:26:03,987 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:26:03,988 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]
[2023-11-21 22:26:03,988 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:26:03,994 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:26:03,994 INFO  L85        PathProgramCache]: Analyzing trace with hash 1290438770, now seen corresponding path program 1 times
[2023-11-21 22:26:04,004 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:26:04,004 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575842943]
[2023-11-21 22:26:04,005 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:04,005 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:26:04,338 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:05,124 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:26:05,125 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:26:05,125 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575842943]
[2023-11-21 22:26:05,126 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575842943] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:26:05,126 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:26:05,126 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-21 22:26:05,128 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635888267]
[2023-11-21 22:26:05,132 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:26:05,138 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:26:05,140 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:26:05,192 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:26:05,192 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:26:05,197 INFO  L87              Difference]: Start difference. First operand  has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 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 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:06,251 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:26:06,252 INFO  L93              Difference]: Finished difference Result 440 states and 860 transitions.
[2023-11-21 22:26:06,253 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-21 22:26:06,255 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 143
[2023-11-21 22:26:06,256 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:26:06,271 INFO  L225             Difference]: With dead ends: 440
[2023-11-21 22:26:06,271 INFO  L226             Difference]: Without dead ends: 289
[2023-11-21 22:26:06,275 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:26:06,279 INFO  L413           NwaCegarLoop]: 45 mSDtfsCounter, 31 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2023-11-21 22:26:06,280 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 50 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2023-11-21 22:26:06,301 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 289 states.
[2023-11-21 22:26:06,341 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289.
[2023-11-21 22:26:06,344 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 289 states, 288 states have (on average 1.8125) internal successors, (522), 288 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:06,346 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 522 transitions.
[2023-11-21 22:26:06,347 INFO  L78                 Accepts]: Start accepts. Automaton has 289 states and 522 transitions. Word has length 143
[2023-11-21 22:26:06,348 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:26:06,349 INFO  L495      AbstractCegarLoop]: Abstraction has 289 states and 522 transitions.
[2023-11-21 22:26:06,349 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:06,349 INFO  L276                IsEmpty]: Start isEmpty. Operand 289 states and 522 transitions.
[2023-11-21 22:26:06,354 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 154
[2023-11-21 22:26:06,354 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:26:06,355 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:26:06,355 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-21 22:26:06,356 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:26:06,356 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:26:06,357 INFO  L85        PathProgramCache]: Analyzing trace with hash -767478580, now seen corresponding path program 1 times
[2023-11-21 22:26:06,357 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:26:06,357 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327921003]
[2023-11-21 22:26:06,357 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:06,358 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:26:06,433 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:06,736 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:26:06,736 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:26:06,737 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327921003]
[2023-11-21 22:26:06,737 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327921003] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:26:06,737 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:26:06,737 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-21 22:26:06,738 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162655604]
[2023-11-21 22:26:06,738 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:26:06,739 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:26:06,740 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:26:06,740 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:26:06,741 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:26:06,741 INFO  L87              Difference]: Start difference. First operand 289 states and 522 transitions. Second operand  has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:07,673 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:26:07,673 INFO  L93              Difference]: Finished difference Result 863 states and 1563 transitions.
[2023-11-21 22:26:07,674 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-21 22:26:07,674 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 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 153
[2023-11-21 22:26:07,674 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:26:07,680 INFO  L225             Difference]: With dead ends: 863
[2023-11-21 22:26:07,680 INFO  L226             Difference]: Without dead ends: 575
[2023-11-21 22:26:07,682 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:26:07,683 INFO  L413           NwaCegarLoop]: 31 mSDtfsCounter, 155 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2023-11-21 22:26:07,684 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 35 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2023-11-21 22:26:07,686 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 575 states.
[2023-11-21 22:26:07,722 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575.
[2023-11-21 22:26:07,724 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 575 states, 574 states have (on average 1.6968641114982579) internal successors, (974), 574 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:07,727 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 974 transitions.
[2023-11-21 22:26:07,727 INFO  L78                 Accepts]: Start accepts. Automaton has 575 states and 974 transitions. Word has length 153
[2023-11-21 22:26:07,727 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:26:07,728 INFO  L495      AbstractCegarLoop]: Abstraction has 575 states and 974 transitions.
[2023-11-21 22:26:07,728 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:07,728 INFO  L276                IsEmpty]: Start isEmpty. Operand 575 states and 974 transitions.
[2023-11-21 22:26:07,734 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 163
[2023-11-21 22:26:07,734 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:26:07,735 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:26:07,735 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-21 22:26:07,735 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:26:07,736 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:26:07,736 INFO  L85        PathProgramCache]: Analyzing trace with hash -1309737876, now seen corresponding path program 1 times
[2023-11-21 22:26:07,736 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:26:07,736 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758705418]
[2023-11-21 22:26:07,737 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:07,737 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:26:07,825 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:08,223 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2023-11-21 22:26:08,223 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:26:08,224 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758705418]
[2023-11-21 22:26:08,224 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758705418] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:26:08,224 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:26:08,224 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-21 22:26:08,224 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649438104]
[2023-11-21 22:26:08,225 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:26:08,225 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:26:08,225 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:26:08,226 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:26:08,226 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:26:08,227 INFO  L87              Difference]: Start difference. First operand 575 states and 974 transitions. Second operand  has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:09,092 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:26:09,092 INFO  L93              Difference]: Finished difference Result 1723 states and 2920 transitions.
[2023-11-21 22:26:09,093 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-21 22:26:09,093 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 162
[2023-11-21 22:26:09,093 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:26:09,101 INFO  L225             Difference]: With dead ends: 1723
[2023-11-21 22:26:09,101 INFO  L226             Difference]: Without dead ends: 1149
[2023-11-21 22:26:09,104 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:26:09,106 INFO  L413           NwaCegarLoop]: 48 mSDtfsCounter, 183 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-21 22:26:09,106 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 52 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-21 22:26:09,109 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1149 states.
[2023-11-21 22:26:09,149 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147.
[2023-11-21 22:26:09,152 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1147 states, 1146 states have (on average 1.6640488656195462) internal successors, (1907), 1146 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:09,158 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1907 transitions.
[2023-11-21 22:26:09,159 INFO  L78                 Accepts]: Start accepts. Automaton has 1147 states and 1907 transitions. Word has length 162
[2023-11-21 22:26:09,159 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:26:09,159 INFO  L495      AbstractCegarLoop]: Abstraction has 1147 states and 1907 transitions.
[2023-11-21 22:26:09,160 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:09,160 INFO  L276                IsEmpty]: Start isEmpty. Operand 1147 states and 1907 transitions.
[2023-11-21 22:26:09,166 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 163
[2023-11-21 22:26:09,167 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:26:09,167 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:26:09,167 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-21 22:26:09,168 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:26:09,168 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:26:09,169 INFO  L85        PathProgramCache]: Analyzing trace with hash 429026403, now seen corresponding path program 1 times
[2023-11-21 22:26:09,169 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:26:09,169 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557287659]
[2023-11-21 22:26:09,169 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:09,170 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:26:09,266 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:09,812 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:26:09,812 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:26:09,813 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557287659]
[2023-11-21 22:26:09,813 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557287659] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:26:09,813 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:26:09,813 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-21 22:26:09,814 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233610111]
[2023-11-21 22:26:09,814 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:26:09,814 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:26:09,815 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:26:09,815 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:26:09,816 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:26:09,816 INFO  L87              Difference]: Start difference. First operand 1147 states and 1907 transitions. Second operand  has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:10,727 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:26:10,727 INFO  L93              Difference]: Finished difference Result 3437 states and 5718 transitions.
[2023-11-21 22:26:10,728 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-21 22:26:10,728 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 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 162
[2023-11-21 22:26:10,729 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:26:10,743 INFO  L225             Difference]: With dead ends: 3437
[2023-11-21 22:26:10,743 INFO  L226             Difference]: Without dead ends: 2291
[2023-11-21 22:26:10,745 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:26:10,747 INFO  L413           NwaCegarLoop]: 64 mSDtfsCounter, 130 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-21 22:26:10,748 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 68 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-21 22:26:10,751 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2291 states.
[2023-11-21 22:26:10,825 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291.
[2023-11-21 22:26:10,830 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2291 states, 2290 states have (on average 1.5611353711790392) internal successors, (3575), 2290 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:10,842 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3575 transitions.
[2023-11-21 22:26:10,842 INFO  L78                 Accepts]: Start accepts. Automaton has 2291 states and 3575 transitions. Word has length 162
[2023-11-21 22:26:10,843 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:26:10,843 INFO  L495      AbstractCegarLoop]: Abstraction has 2291 states and 3575 transitions.
[2023-11-21 22:26:10,843 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:10,843 INFO  L276                IsEmpty]: Start isEmpty. Operand 2291 states and 3575 transitions.
[2023-11-21 22:26:10,850 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 164
[2023-11-21 22:26:10,850 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:26:10,850 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:26:10,850 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-21 22:26:10,851 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:26:10,851 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:26:10,851 INFO  L85        PathProgramCache]: Analyzing trace with hash 73100003, now seen corresponding path program 1 times
[2023-11-21 22:26:10,851 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:26:10,852 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238315561]
[2023-11-21 22:26:10,852 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:10,852 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:26:10,920 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:11,194 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:26:11,194 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:26:11,194 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238315561]
[2023-11-21 22:26:11,194 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238315561] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:26:11,195 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426986606]
[2023-11-21 22:26:11,195 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:11,195 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:26:11,195 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:26:11,197 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 22:26:11,216 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-21 22:26:11,392 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:11,395 INFO  L262         TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-21 22:26:11,407 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 22:26:11,467 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-11-21 22:26:11,467 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-21 22:26:11,467 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [426986606] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:26:11,468 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-21 22:26:11,468 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4
[2023-11-21 22:26:11,468 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447912135]
[2023-11-21 22:26:11,468 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:26:11,469 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:26:11,469 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:26:11,470 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:26:11,470 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-21 22:26:11,470 INFO  L87              Difference]: Start difference. First operand 2291 states and 3575 transitions. Second operand  has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:12,461 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:26:12,461 INFO  L93              Difference]: Finished difference Result 6871 states and 10723 transitions.
[2023-11-21 22:26:12,462 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-21 22:26:12,462 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 163
[2023-11-21 22:26:12,462 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:26:12,489 INFO  L225             Difference]: With dead ends: 6871
[2023-11-21 22:26:12,489 INFO  L226             Difference]: Without dead ends: 4581
[2023-11-21 22:26:12,493 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-21 22:26:12,494 INFO  L413           NwaCegarLoop]: 46 mSDtfsCounter, 156 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2023-11-21 22:26:12,495 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 50 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2023-11-21 22:26:12,501 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4581 states.
[2023-11-21 22:26:12,599 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 4579.
[2023-11-21 22:26:12,609 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4579 states, 4578 states have (on average 1.4737876802096985) internal successors, (6747), 4578 states have internal predecessors, (6747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:12,631 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 6747 transitions.
[2023-11-21 22:26:12,631 INFO  L78                 Accepts]: Start accepts. Automaton has 4579 states and 6747 transitions. Word has length 163
[2023-11-21 22:26:12,632 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:26:12,632 INFO  L495      AbstractCegarLoop]: Abstraction has 4579 states and 6747 transitions.
[2023-11-21 22:26:12,632 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:12,632 INFO  L276                IsEmpty]: Start isEmpty. Operand 4579 states and 6747 transitions.
[2023-11-21 22:26:12,642 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 168
[2023-11-21 22:26:12,642 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:26:12,643 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:26:12,670 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-21 22:26:12,864 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:26:12,865 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:26:12,866 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:26:12,866 INFO  L85        PathProgramCache]: Analyzing trace with hash -10963272, now seen corresponding path program 1 times
[2023-11-21 22:26:12,866 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:26:12,866 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45428935]
[2023-11-21 22:26:12,866 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:12,866 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:26:12,937 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:13,206 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:26:13,207 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:26:13,207 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45428935]
[2023-11-21 22:26:13,207 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45428935] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:26:13,207 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260024816]
[2023-11-21 22:26:13,208 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:13,208 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:26:13,208 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:26:13,209 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 22:26:13,232 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-21 22:26:13,494 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:13,497 INFO  L262         TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-21 22:26:13,511 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 22:26:13,547 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-11-21 22:26:13,547 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-21 22:26:13,547 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [260024816] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:26:13,548 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-21 22:26:13,548 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5
[2023-11-21 22:26:13,548 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566301887]
[2023-11-21 22:26:13,548 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:26:13,549 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:26:13,549 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:26:13,550 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:26:13,550 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-21 22:26:13,551 INFO  L87              Difference]: Start difference. First operand 4579 states and 6747 transitions. Second operand  has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:14,480 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:26:14,481 INFO  L93              Difference]: Finished difference Result 12589 states and 18655 transitions.
[2023-11-21 22:26:14,481 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-21 22:26:14,481 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 167
[2023-11-21 22:26:14,482 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:26:14,523 INFO  L225             Difference]: With dead ends: 12589
[2023-11-21 22:26:14,524 INFO  L226             Difference]: Without dead ends: 8011
[2023-11-21 22:26:14,531 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-11-21 22:26:14,532 INFO  L413           NwaCegarLoop]: 257 mSDtfsCounter, 149 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-21 22:26:14,532 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 261 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-21 22:26:14,543 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8011 states.
[2023-11-21 22:26:14,705 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8011 to 8011.
[2023-11-21 22:26:14,720 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8011 states, 8010 states have (on average 1.3077403245942572) internal successors, (10475), 8010 states have internal predecessors, (10475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:14,756 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8011 states to 8011 states and 10475 transitions.
[2023-11-21 22:26:14,756 INFO  L78                 Accepts]: Start accepts. Automaton has 8011 states and 10475 transitions. Word has length 167
[2023-11-21 22:26:14,757 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:26:14,757 INFO  L495      AbstractCegarLoop]: Abstraction has 8011 states and 10475 transitions.
[2023-11-21 22:26:14,757 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:14,757 INFO  L276                IsEmpty]: Start isEmpty. Operand 8011 states and 10475 transitions.
[2023-11-21 22:26:14,771 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 169
[2023-11-21 22:26:14,772 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:26:14,772 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:26:14,796 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-21 22:26:14,993 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:26:14,994 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:26:14,994 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:26:14,994 INFO  L85        PathProgramCache]: Analyzing trace with hash 957066978, now seen corresponding path program 1 times
[2023-11-21 22:26:14,994 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:26:14,995 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786013613]
[2023-11-21 22:26:14,995 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:14,995 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:26:15,114 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:15,266 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:26:15,267 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:26:15,267 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786013613]
[2023-11-21 22:26:15,267 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786013613] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:26:15,268 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:26:15,268 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-21 22:26:15,268 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785142158]
[2023-11-21 22:26:15,268 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:26:15,269 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:26:15,269 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:26:15,270 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:26:15,270 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:26:15,271 INFO  L87              Difference]: Start difference. First operand 8011 states and 10475 transitions. Second operand  has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:16,253 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:26:16,253 INFO  L93              Difference]: Finished difference Result 20740 states and 27249 transitions.
[2023-11-21 22:26:16,254 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-21 22:26:16,254 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 168
[2023-11-21 22:26:16,255 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:26:16,331 INFO  L225             Difference]: With dead ends: 20740
[2023-11-21 22:26:16,331 INFO  L226             Difference]: Without dead ends: 12873
[2023-11-21 22:26:16,342 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:26:16,343 INFO  L413           NwaCegarLoop]: 60 mSDtfsCounter, 152 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-21 22:26:16,344 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 63 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-21 22:26:16,361 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12873 states.
[2023-11-21 22:26:16,605 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12873 to 12873.
[2023-11-21 22:26:16,638 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12873 states, 12872 states have (on average 1.278744561839652) internal successors, (16460), 12872 states have internal predecessors, (16460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:16,689 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12873 states to 12873 states and 16460 transitions.
[2023-11-21 22:26:16,690 INFO  L78                 Accepts]: Start accepts. Automaton has 12873 states and 16460 transitions. Word has length 168
[2023-11-21 22:26:16,690 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:26:16,690 INFO  L495      AbstractCegarLoop]: Abstraction has 12873 states and 16460 transitions.
[2023-11-21 22:26:16,691 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:16,691 INFO  L276                IsEmpty]: Start isEmpty. Operand 12873 states and 16460 transitions.
[2023-11-21 22:26:16,707 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 170
[2023-11-21 22:26:16,708 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:26:16,708 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:26:16,708 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2023-11-21 22:26:16,708 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:26:16,709 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:26:16,709 INFO  L85        PathProgramCache]: Analyzing trace with hash 445030228, now seen corresponding path program 1 times
[2023-11-21 22:26:16,709 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:26:16,709 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953708975]
[2023-11-21 22:26:16,710 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:16,710 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:26:16,816 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:17,278 INFO  L134       CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:26:17,278 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:26:17,278 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953708975]
[2023-11-21 22:26:17,278 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953708975] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:26:17,279 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42687293]
[2023-11-21 22:26:17,279 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:17,279 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:26:17,279 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:26:17,281 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 22:26:17,307 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-21 22:26:17,469 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:17,471 INFO  L262         TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-21 22:26:17,481 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 22:26:17,543 INFO  L134       CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-11-21 22:26:17,543 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-21 22:26:17,544 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [42687293] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:26:17,544 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-21 22:26:17,544 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4
[2023-11-21 22:26:17,544 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869518702]
[2023-11-21 22:26:17,545 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:26:17,545 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:26:17,546 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:26:17,546 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:26:17,546 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-21 22:26:17,547 INFO  L87              Difference]: Start difference. First operand 12873 states and 16460 transitions. Second operand  has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:18,606 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:26:18,607 INFO  L93              Difference]: Finished difference Result 29320 states and 38536 transitions.
[2023-11-21 22:26:18,607 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-21 22:26:18,607 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 169
[2023-11-21 22:26:18,608 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:26:18,643 INFO  L225             Difference]: With dead ends: 29320
[2023-11-21 22:26:18,644 INFO  L226             Difference]: Without dead ends: 16734
[2023-11-21 22:26:18,660 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-21 22:26:18,663 INFO  L413           NwaCegarLoop]: 84 mSDtfsCounter, 139 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2023-11-21 22:26:18,664 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 87 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2023-11-21 22:26:18,687 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16734 states.
[2023-11-21 22:26:18,923 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16734 to 14160.
[2023-11-21 22:26:18,945 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14160 states, 14159 states have (on average 1.2774913482590577) internal successors, (18088), 14159 states have internal predecessors, (18088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:18,973 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14160 states to 14160 states and 18088 transitions.
[2023-11-21 22:26:18,973 INFO  L78                 Accepts]: Start accepts. Automaton has 14160 states and 18088 transitions. Word has length 169
[2023-11-21 22:26:18,974 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:26:18,974 INFO  L495      AbstractCegarLoop]: Abstraction has 14160 states and 18088 transitions.
[2023-11-21 22:26:18,978 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:18,978 INFO  L276                IsEmpty]: Start isEmpty. Operand 14160 states and 18088 transitions.
[2023-11-21 22:26:18,999 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 200
[2023-11-21 22:26:18,999 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:26:18,999 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:26:19,031 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-21 22:26:19,219 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:26:19,219 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:26:19,220 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:26:19,220 INFO  L85        PathProgramCache]: Analyzing trace with hash -332385481, now seen corresponding path program 1 times
[2023-11-21 22:26:19,220 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:26:19,220 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611197963]
[2023-11-21 22:26:19,220 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:19,221 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:26:19,298 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:19,851 INFO  L134       CoverageAnalysis]: Checked inductivity of 85 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2023-11-21 22:26:19,852 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:26:19,852 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611197963]
[2023-11-21 22:26:19,852 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611197963] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:26:19,852 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347731332]
[2023-11-21 22:26:19,853 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:19,853 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:26:19,853 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:26:19,854 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 22:26:19,876 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-21 22:26:20,062 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:20,065 INFO  L262         TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core
[2023-11-21 22:26:20,070 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 22:26:20,152 INFO  L134       CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2023-11-21 22:26:20,152 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-21 22:26:20,152 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347731332] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:26:20,153 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-21 22:26:20,153 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4
[2023-11-21 22:26:20,153 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563693481]
[2023-11-21 22:26:20,153 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:26:20,154 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:26:20,154 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:26:20,155 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:26:20,155 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-21 22:26:20,155 INFO  L87              Difference]: Start difference. First operand 14160 states and 18088 transitions. Second operand  has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:20,745 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:26:20,745 INFO  L93              Difference]: Finished difference Result 27890 states and 35671 transitions.
[2023-11-21 22:26:20,745 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-21 22:26:20,746 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 199
[2023-11-21 22:26:20,746 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:26:20,773 INFO  L225             Difference]: With dead ends: 27890
[2023-11-21 22:26:20,774 INFO  L226             Difference]: Without dead ends: 13874
[2023-11-21 22:26:20,789 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-21 22:26:20,790 INFO  L413           NwaCegarLoop]: 4 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-11-21 22:26:20,790 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-11-21 22:26:20,807 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13874 states.
[2023-11-21 22:26:21,107 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13874 to 13874.
[2023-11-21 22:26:21,129 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13874 states, 13873 states have (on average 1.2620918330570172) internal successors, (17509), 13873 states have internal predecessors, (17509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:21,163 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13874 states to 13874 states and 17509 transitions.
[2023-11-21 22:26:21,176 INFO  L78                 Accepts]: Start accepts. Automaton has 13874 states and 17509 transitions. Word has length 199
[2023-11-21 22:26:21,176 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:26:21,177 INFO  L495      AbstractCegarLoop]: Abstraction has 13874 states and 17509 transitions.
[2023-11-21 22:26:21,177 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:21,177 INFO  L276                IsEmpty]: Start isEmpty. Operand 13874 states and 17509 transitions.
[2023-11-21 22:26:21,213 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 211
[2023-11-21 22:26:21,219 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:26:21,229 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:26:21,258 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-21 22:26:21,429 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:26:21,430 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:26:21,430 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:26:21,431 INFO  L85        PathProgramCache]: Analyzing trace with hash -215112792, now seen corresponding path program 1 times
[2023-11-21 22:26:21,431 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:26:21,431 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035299441]
[2023-11-21 22:26:21,431 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:21,431 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:26:21,548 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:21,954 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2023-11-21 22:26:21,954 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:26:21,954 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035299441]
[2023-11-21 22:26:21,954 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035299441] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:26:21,955 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:26:21,955 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-21 22:26:21,955 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215529672]
[2023-11-21 22:26:21,955 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:26:21,956 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-21 22:26:21,956 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:26:21,957 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-21 22:26:21,957 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-21 22:26:21,957 INFO  L87              Difference]: Start difference. First operand 13874 states and 17509 transitions. Second operand  has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:23,353 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:26:23,354 INFO  L93              Difference]: Finished difference Result 52204 states and 66019 transitions.
[2023-11-21 22:26:23,354 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-21 22:26:23,355 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 210
[2023-11-21 22:26:23,355 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:26:23,426 INFO  L225             Difference]: With dead ends: 52204
[2023-11-21 22:26:23,426 INFO  L226             Difference]: Without dead ends: 38474
[2023-11-21 22:26:23,442 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-21 22:26:23,443 INFO  L413           NwaCegarLoop]: 6 mSDtfsCounter, 597 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2023-11-21 22:26:23,444 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 149 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2023-11-21 22:26:23,477 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38474 states.
[2023-11-21 22:26:23,956 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38474 to 36754.
[2023-11-21 22:26:24,004 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 36754 states, 36753 states have (on average 1.2573123282453134) internal successors, (46210), 36753 states have internal predecessors, (46210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:24,359 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36754 states to 36754 states and 46210 transitions.
[2023-11-21 22:26:24,360 INFO  L78                 Accepts]: Start accepts. Automaton has 36754 states and 46210 transitions. Word has length 210
[2023-11-21 22:26:24,360 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:26:24,360 INFO  L495      AbstractCegarLoop]: Abstraction has 36754 states and 46210 transitions.
[2023-11-21 22:26:24,360 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:24,361 INFO  L276                IsEmpty]: Start isEmpty. Operand 36754 states and 46210 transitions.
[2023-11-21 22:26:24,379 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 222
[2023-11-21 22:26:24,379 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:26:24,380 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:26:24,380 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2023-11-21 22:26:24,380 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:26:24,381 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:26:24,381 INFO  L85        PathProgramCache]: Analyzing trace with hash -1893370441, now seen corresponding path program 1 times
[2023-11-21 22:26:24,381 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:26:24,382 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650964719]
[2023-11-21 22:26:24,382 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:24,382 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:26:24,461 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:25,177 INFO  L134       CoverageAnalysis]: Checked inductivity of 119 backedges. 83 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2023-11-21 22:26:25,177 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:26:25,180 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650964719]
[2023-11-21 22:26:25,180 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650964719] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:26:25,180 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865502372]
[2023-11-21 22:26:25,180 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:25,181 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:26:25,181 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:26:25,185 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 22:26:25,211 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-21 22:26:25,427 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:25,430 INFO  L262         TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-11-21 22:26:25,436 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 22:26:25,709 INFO  L134       CoverageAnalysis]: Checked inductivity of 119 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked.
[2023-11-21 22:26:25,709 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-21 22:26:25,710 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [865502372] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:26:25,710 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-21 22:26:25,710 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5
[2023-11-21 22:26:25,710 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289752829]
[2023-11-21 22:26:25,710 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:26:25,711 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:26:25,711 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:26:25,711 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:26:25,712 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-21 22:26:25,713 INFO  L87              Difference]: Start difference. First operand 36754 states and 46210 transitions. Second operand  has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:26,695 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:26:26,695 INFO  L93              Difference]: Finished difference Result 87378 states and 109856 transitions.
[2023-11-21 22:26:26,696 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-21 22:26:26,696 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 221
[2023-11-21 22:26:26,697 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:26:26,785 INFO  L225             Difference]: With dead ends: 87378
[2023-11-21 22:26:26,786 INFO  L226             Difference]: Without dead ends: 50768
[2023-11-21 22:26:26,817 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-21 22:26:26,818 INFO  L413           NwaCegarLoop]: 82 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-21 22:26:26,818 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 98 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-21 22:26:26,869 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50768 states.
[2023-11-21 22:26:27,827 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50768 to 47765.
[2023-11-21 22:26:27,874 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 47765 states, 47764 states have (on average 1.261263713256846) internal successors, (60243), 47764 states have internal predecessors, (60243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:27,986 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 47765 states to 47765 states and 60243 transitions.
[2023-11-21 22:26:27,987 INFO  L78                 Accepts]: Start accepts. Automaton has 47765 states and 60243 transitions. Word has length 221
[2023-11-21 22:26:27,988 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:26:27,988 INFO  L495      AbstractCegarLoop]: Abstraction has 47765 states and 60243 transitions.
[2023-11-21 22:26:28,184 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:28,184 INFO  L276                IsEmpty]: Start isEmpty. Operand 47765 states and 60243 transitions.
[2023-11-21 22:26:28,226 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 222
[2023-11-21 22:26:28,226 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:26:28,226 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:26:28,271 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-21 22:26:28,448 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-11-21 22:26:28,448 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:26:28,449 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:26:28,449 INFO  L85        PathProgramCache]: Analyzing trace with hash 1207391241, now seen corresponding path program 1 times
[2023-11-21 22:26:28,449 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:26:28,449 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242288128]
[2023-11-21 22:26:28,449 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:28,449 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:26:28,527 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:30,561 INFO  L134       CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:26:30,561 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:26:30,561 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242288128]
[2023-11-21 22:26:30,562 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242288128] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:26:30,562 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304782524]
[2023-11-21 22:26:30,562 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:30,563 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:26:30,563 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:26:30,564 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 22:26:30,576 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-21 22:26:30,837 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:30,840 INFO  L262         TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 3 conjunts are in the unsatisfiable core
[2023-11-21 22:26:30,847 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 22:26:31,184 INFO  L134       CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:26:31,184 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-21 22:26:31,564 INFO  L134       CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:26:31,565 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304782524] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-21 22:26:31,565 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-21 22:26:31,565 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7
[2023-11-21 22:26:31,566 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659277846]
[2023-11-21 22:26:31,566 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-21 22:26:31,567 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-21 22:26:31,567 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:26:31,569 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-21 22:26:31,569 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2023-11-21 22:26:31,569 INFO  L87              Difference]: Start difference. First operand 47765 states and 60243 transitions. Second operand  has 7 states, 7 states have (on average 63.0) internal successors, (441), 7 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:34,917 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:26:34,917 INFO  L93              Difference]: Finished difference Result 107366 states and 136217 transitions.
[2023-11-21 22:26:34,918 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2023-11-21 22:26:34,918 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 63.0) internal successors, (441), 7 states have internal predecessors, (441), 0 states have call successors, (0), 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 221
[2023-11-21 22:26:34,918 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:26:35,024 INFO  L225             Difference]: With dead ends: 107366
[2023-11-21 22:26:35,025 INFO  L226             Difference]: Without dead ends: 59745
[2023-11-21 22:26:35,065 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210
[2023-11-21 22:26:35,066 INFO  L413           NwaCegarLoop]: 13 mSDtfsCounter, 689 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time
[2023-11-21 22:26:35,066 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 36 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time]
[2023-11-21 22:26:35,141 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 59745 states.
[2023-11-21 22:26:36,208 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 59745 to 57489.
[2023-11-21 22:26:36,254 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 57489 states, 57488 states have (on average 1.2624373782354579) internal successors, (72575), 57488 states have internal predecessors, (72575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:36,599 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57489 states to 57489 states and 72575 transitions.
[2023-11-21 22:26:36,600 INFO  L78                 Accepts]: Start accepts. Automaton has 57489 states and 72575 transitions. Word has length 221
[2023-11-21 22:26:36,600 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:26:36,600 INFO  L495      AbstractCegarLoop]: Abstraction has 57489 states and 72575 transitions.
[2023-11-21 22:26:36,601 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 63.0) internal successors, (441), 7 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:36,601 INFO  L276                IsEmpty]: Start isEmpty. Operand 57489 states and 72575 transitions.
[2023-11-21 22:26:36,632 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 259
[2023-11-21 22:26:36,633 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 22:26:36,633 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:26:36,664 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-21 22:26:36,848 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e663bc26-a8b1-4a5a-b7ff-75e35135cf4b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-21 22:26:36,849 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 22:26:36,849 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:26:36,850 INFO  L85        PathProgramCache]: Analyzing trace with hash 654727214, now seen corresponding path program 1 times
[2023-11-21 22:26:36,850 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:26:36,850 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641783157]
[2023-11-21 22:26:36,850 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:26:36,850 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:26:36,965 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:26:37,174 INFO  L134       CoverageAnalysis]: Checked inductivity of 132 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:26:37,174 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:26:37,174 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641783157]
[2023-11-21 22:26:37,175 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641783157] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:26:37,175 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:26:37,175 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-21 22:26:37,175 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813606183]
[2023-11-21 22:26:37,175 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:26:37,176 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:26:37,176 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:26:37,177 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:26:37,177 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:26:37,178 INFO  L87              Difference]: Start difference. First operand 57489 states and 72575 transitions. Second operand  has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:26:38,765 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:26:38,765 INFO  L93              Difference]: Finished difference Result 122985 states and 155889 transitions.
[2023-11-21 22:26:38,766 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-21 22:26:38,766 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 258
[2023-11-21 22:26:38,767 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:26:38,858 INFO  L225             Difference]: With dead ends: 122985
[2023-11-21 22:26:38,858 INFO  L226             Difference]: Without dead ends: 66069
[2023-11-21 22:26:38,904 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:26:38,905 INFO  L413           NwaCegarLoop]: 217 mSDtfsCounter, 162 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2023-11-21 22:26:38,905 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 221 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2023-11-21 22:26:38,974 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 66069 states.