./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label04.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version cf1a7837
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl --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 2adccaef3712b0295c8f7cfd3e1ed73b8b25a6bf1026bcea89334476cfd41a2b
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-cf1a783
[2023-11-12 02:09:38,943 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-12 02:09:39,059 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-12 02:09:39,070 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-12 02:09:39,071 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-12 02:09:39,111 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-12 02:09:39,116 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-12 02:09:39,117 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-12 02:09:39,118 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-12 02:09:39,123 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-12 02:09:39,124 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-12 02:09:39,125 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-12 02:09:39,126 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-12 02:09:39,127 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-12 02:09:39,128 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-12 02:09:39,128 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-11-12 02:09:39,129 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-12 02:09:39,129 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-11-12 02:09:39,130 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-12 02:09:39,131 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-12 02:09:39,131 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-12 02:09:39,132 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-12 02:09:39,132 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-11-12 02:09:39,133 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-12 02:09:39,133 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-12 02:09:39,134 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-12 02:09:39,135 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-12 02:09:39,135 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-12 02:09:39,136 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-12 02:09:39,136 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-12 02:09:39,138 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-12 02:09:39,138 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-12 02:09:39,138 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-12 02:09:39,139 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-12 02:09:39,139 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-12 02:09:39,139 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-12 02:09:39,140 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-12 02:09:39,140 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-12 02:09:39,140 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-12 02:09:39,141 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_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl/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_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl
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 -> 2adccaef3712b0295c8f7cfd3e1ed73b8b25a6bf1026bcea89334476cfd41a2b
[2023-11-12 02:09:39,475 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-12 02:09:39,511 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-12 02:09:39,515 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-12 02:09:39,517 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-12 02:09:39,517 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-12 02:09:39,519 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/eca-rers2012/Problem13_label04.c
[2023-11-12 02:09:42,524 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-12 02:09:43,149 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-12 02:09:43,149 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553b096c-e7c2-4782-ac59-347e27816dfc/sv-benchmarks/c/eca-rers2012/Problem13_label04.c
[2023-11-12 02:09:43,193 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl/data/6355c7eea/698a52cc64ba4ce89bf8f5d544086c6f/FLAG6240fc74e
[2023-11-12 02:09:43,212 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl/data/6355c7eea/698a52cc64ba4ce89bf8f5d544086c6f
[2023-11-12 02:09:43,218 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-12 02:09:43,219 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-12 02:09:43,224 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-12 02:09:43,224 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-12 02:09:43,229 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-12 02:09:43,230 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:09:43" (1/1) ...
[2023-11-12 02:09:43,231 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e30c295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:43, skipping insertion in model container
[2023-11-12 02:09:43,231 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:09:43" (1/1) ...
[2023-11-12 02:09:43,407 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-12 02:09:43,703 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_553b096c-e7c2-4782-ac59-347e27816dfc/sv-benchmarks/c/eca-rers2012/Problem13_label04.c[2611,2624]
[2023-11-12 02:09:44,905 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-12 02:09:44,916 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-12 02:09:44,944 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_553b096c-e7c2-4782-ac59-347e27816dfc/sv-benchmarks/c/eca-rers2012/Problem13_label04.c[2611,2624]
[2023-11-12 02:09:45,772 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-12 02:09:45,802 INFO  L206         MainTranslator]: Completed translation
[2023-11-12 02:09:45,802 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:45 WrapperNode
[2023-11-12 02:09:45,803 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-12 02:09:45,804 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-12 02:09:45,805 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-12 02:09:45,805 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-12 02:09:45,813 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:45" (1/1) ...
[2023-11-12 02:09:45,900 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:45" (1/1) ...
[2023-11-12 02:09:46,738 INFO  L138                Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5584
[2023-11-12 02:09:46,749 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-12 02:09:46,750 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-12 02:09:46,750 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-12 02:09:46,750 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-12 02:09:46,775 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:45" (1/1) ...
[2023-11-12 02:09:46,776 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:45" (1/1) ...
[2023-11-12 02:09:46,985 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:45" (1/1) ...
[2023-11-12 02:09:46,985 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:45" (1/1) ...
[2023-11-12 02:09:47,241 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:45" (1/1) ...
[2023-11-12 02:09:47,266 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:45" (1/1) ...
[2023-11-12 02:09:47,299 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:45" (1/1) ...
[2023-11-12 02:09:47,316 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:45" (1/1) ...
[2023-11-12 02:09:47,487 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-12 02:09:47,488 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-12 02:09:47,488 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-12 02:09:47,488 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-12 02:09:47,489 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:45" (1/1) ...
[2023-11-12 02:09:47,496 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-12 02:09:47,507 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:09:47,560 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-12 02:09:47,596 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553b096c-e7c2-4782-ac59-347e27816dfc/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-12 02:09:47,607 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-12 02:09:47,607 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-12 02:09:47,607 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-12 02:09:47,608 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-12 02:09:47,690 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-12 02:09:47,692 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-12 02:09:54,816 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-12 02:09:54,836 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-12 02:09:54,836 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-12 02:09:54,840 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:09:54 BoogieIcfgContainer
[2023-11-12 02:09:54,841 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-12 02:09:54,843 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-12 02:09:54,844 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-12 02:09:54,847 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-12 02:09:54,848 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:09:43" (1/3) ...
[2023-11-12 02:09:54,849 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4567ce0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:09:54, skipping insertion in model container
[2023-11-12 02:09:54,849 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:45" (2/3) ...
[2023-11-12 02:09:54,849 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4567ce0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:09:54, skipping insertion in model container
[2023-11-12 02:09:54,850 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:09:54" (3/3) ...
[2023-11-12 02:09:54,851 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem13_label04.c
[2023-11-12 02:09:54,872 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-12 02:09:54,872 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-12 02:09:54,958 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-12 02:09:54,965 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;@6ffb1cab, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-12 02:09:54,965 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-12 02:09:54,975 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:09:54,982 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2023-11-12 02:09:54,982 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:09:54,983 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:09:54,984 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:09:54,990 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:09:54,990 INFO  L85        PathProgramCache]: Analyzing trace with hash -1657508526, now seen corresponding path program 1 times
[2023-11-12 02:09:55,000 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:09:55,001 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141795286]
[2023-11-12 02:09:55,001 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:09:55,002 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:09:55,120 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:09:55,284 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:09:55,285 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:09:55,285 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141795286]
[2023-11-12 02:09:55,287 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141795286] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:09:55,287 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:09:55,288 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-12 02:09:55,289 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026588175]
[2023-11-12 02:09:55,297 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:09:55,302 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:09:55,304 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:09:55,352 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:09:55,353 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:09:55,359 INFO  L87              Difference]: Start difference. First operand  has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:01,378 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:10:01,379 INFO  L93              Difference]: Finished difference Result 3147 states and 5806 transitions.
[2023-11-12 02:10:01,380 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-12 02:10:01,381 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16
[2023-11-12 02:10:01,381 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:10:01,417 INFO  L225             Difference]: With dead ends: 3147
[2023-11-12 02:10:01,417 INFO  L226             Difference]: Without dead ends: 1964
[2023-11-12 02:10:01,427 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
[2023-11-12 02:10:01,433 INFO  L413           NwaCegarLoop]: 764 mSDtfsCounter, 1163 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time
[2023-11-12 02:10:01,434 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 992 Invalid, 3298 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [584 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time]
[2023-11-12 02:10:01,454 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1964 states.
[2023-11-12 02:10:01,572 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1951.
[2023-11-12 02:10:01,578 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1951 states, 1950 states have (on average 1.6538461538461537) internal successors, (3225), 1950 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:01,588 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 3225 transitions.
[2023-11-12 02:10:01,590 INFO  L78                 Accepts]: Start accepts. Automaton has 1951 states and 3225 transitions. Word has length 16
[2023-11-12 02:10:01,590 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:10:01,590 INFO  L495      AbstractCegarLoop]: Abstraction has 1951 states and 3225 transitions.
[2023-11-12 02:10:01,591 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:01,591 INFO  L276                IsEmpty]: Start isEmpty. Operand 1951 states and 3225 transitions.
[2023-11-12 02:10:01,594 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 88
[2023-11-12 02:10:01,594 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:10:01,595 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-11-12 02:10:01,595 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-12 02:10:01,595 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:10:01,596 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:10:01,597 INFO  L85        PathProgramCache]: Analyzing trace with hash -9926837, now seen corresponding path program 1 times
[2023-11-12 02:10:01,597 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:10:01,597 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544089446]
[2023-11-12 02:10:01,597 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:10:01,598 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:10:01,701 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:10:01,940 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:10:01,940 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:10:01,941 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544089446]
[2023-11-12 02:10:01,941 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544089446] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:10:01,941 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:10:01,942 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-12 02:10:01,942 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752830201]
[2023-11-12 02:10:01,942 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:10:01,943 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:10:01,944 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:10:01,945 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:10:01,945 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:10:01,945 INFO  L87              Difference]: Start difference. First operand 1951 states and 3225 transitions. Second operand  has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:08,082 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:10:08,082 INFO  L93              Difference]: Finished difference Result 5540 states and 9221 transitions.
[2023-11-12 02:10:08,083 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-12 02:10:08,083 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 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 87
[2023-11-12 02:10:08,085 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:10:08,106 INFO  L225             Difference]: With dead ends: 5540
[2023-11-12 02:10:08,107 INFO  L226             Difference]: Without dead ends: 3591
[2023-11-12 02:10:08,115 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
[2023-11-12 02:10:08,116 INFO  L413           NwaCegarLoop]: 871 mSDtfsCounter, 923 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time
[2023-11-12 02:10:08,117 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 1007 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time]
[2023-11-12 02:10:08,123 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3591 states.
[2023-11-12 02:10:08,255 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 3581.
[2023-11-12 02:10:08,262 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3581 states, 3580 states have (on average 1.5050279329608938) internal successors, (5388), 3580 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:08,272 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5388 transitions.
[2023-11-12 02:10:08,273 INFO  L78                 Accepts]: Start accepts. Automaton has 3581 states and 5388 transitions. Word has length 87
[2023-11-12 02:10:08,274 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:10:08,274 INFO  L495      AbstractCegarLoop]: Abstraction has 3581 states and 5388 transitions.
[2023-11-12 02:10:08,274 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:08,275 INFO  L276                IsEmpty]: Start isEmpty. Operand 3581 states and 5388 transitions.
[2023-11-12 02:10:08,287 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 102
[2023-11-12 02:10:08,287 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:10:08,288 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-11-12 02:10:08,288 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-12 02:10:08,289 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:10:08,291 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:10:08,292 INFO  L85        PathProgramCache]: Analyzing trace with hash 152230728, now seen corresponding path program 1 times
[2023-11-12 02:10:08,292 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:10:08,292 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022700654]
[2023-11-12 02:10:08,294 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:10:08,294 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:10:08,363 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:10:08,528 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:10:08,529 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:10:08,529 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022700654]
[2023-11-12 02:10:08,529 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022700654] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:10:08,530 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:10:08,530 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-12 02:10:08,530 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241038070]
[2023-11-12 02:10:08,530 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:10:08,531 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:10:08,531 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:10:08,532 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:10:08,532 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:10:08,533 INFO  L87              Difference]: Start difference. First operand 3581 states and 5388 transitions. Second operand  has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:13,555 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:10:13,555 INFO  L93              Difference]: Finished difference Result 10352 states and 15625 transitions.
[2023-11-12 02:10:13,557 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-12 02:10:13,557 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 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 101
[2023-11-12 02:10:13,558 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:10:13,599 INFO  L225             Difference]: With dead ends: 10352
[2023-11-12 02:10:13,599 INFO  L226             Difference]: Without dead ends: 6773
[2023-11-12 02:10:13,606 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
[2023-11-12 02:10:13,608 INFO  L413           NwaCegarLoop]: 1021 mSDtfsCounter, 785 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time
[2023-11-12 02:10:13,609 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 1172 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 2491 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time]
[2023-11-12 02:10:13,619 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6773 states.
[2023-11-12 02:10:13,743 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 6749.
[2023-11-12 02:10:13,758 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6749 states, 6748 states have (on average 1.3252815649081209) internal successors, (8943), 6748 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:13,778 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8943 transitions.
[2023-11-12 02:10:13,779 INFO  L78                 Accepts]: Start accepts. Automaton has 6749 states and 8943 transitions. Word has length 101
[2023-11-12 02:10:13,783 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:10:13,783 INFO  L495      AbstractCegarLoop]: Abstraction has 6749 states and 8943 transitions.
[2023-11-12 02:10:13,784 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:13,784 INFO  L276                IsEmpty]: Start isEmpty. Operand 6749 states and 8943 transitions.
[2023-11-12 02:10:13,789 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 131
[2023-11-12 02:10:13,789 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:10:13,791 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-11-12 02:10:13,791 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-12 02:10:13,791 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:10:13,799 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:10:13,800 INFO  L85        PathProgramCache]: Analyzing trace with hash -1958755326, now seen corresponding path program 1 times
[2023-11-12 02:10:13,801 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:10:13,801 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446753956]
[2023-11-12 02:10:13,801 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:10:13,802 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:10:13,869 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:10:14,255 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:10:14,255 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:10:14,255 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446753956]
[2023-11-12 02:10:14,255 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446753956] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:10:14,255 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:10:14,256 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-12 02:10:14,256 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342219891]
[2023-11-12 02:10:14,256 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:10:14,257 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:10:14,257 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:10:14,257 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:10:14,258 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:10:14,258 INFO  L87              Difference]: Start difference. First operand 6749 states and 8943 transitions. Second operand  has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:18,955 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:10:18,955 INFO  L93              Difference]: Finished difference Result 19804 states and 26220 transitions.
[2023-11-12 02:10:18,955 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-12 02:10:18,956 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 130
[2023-11-12 02:10:18,956 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:10:19,040 INFO  L225             Difference]: With dead ends: 19804
[2023-11-12 02:10:19,041 INFO  L226             Difference]: Without dead ends: 13057
[2023-11-12 02:10:19,053 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
[2023-11-12 02:10:19,054 INFO  L413           NwaCegarLoop]: 883 mSDtfsCounter, 865 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time
[2023-11-12 02:10:19,055 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [865 Valid, 1035 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [875 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time]
[2023-11-12 02:10:19,076 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13057 states.
[2023-11-12 02:10:19,319 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13057 to 13052.
[2023-11-12 02:10:19,512 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13052 states, 13051 states have (on average 1.217914336066202) internal successors, (15895), 13051 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:19,566 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 15895 transitions.
[2023-11-12 02:10:19,566 INFO  L78                 Accepts]: Start accepts. Automaton has 13052 states and 15895 transitions. Word has length 130
[2023-11-12 02:10:19,567 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:10:19,568 INFO  L495      AbstractCegarLoop]: Abstraction has 13052 states and 15895 transitions.
[2023-11-12 02:10:19,569 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:19,569 INFO  L276                IsEmpty]: Start isEmpty. Operand 13052 states and 15895 transitions.
[2023-11-12 02:10:19,573 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 209
[2023-11-12 02:10:19,573 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:10:19,574 INFO  L195           NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:10:19,574 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-12 02:10:19,574 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:10:19,576 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:10:19,576 INFO  L85        PathProgramCache]: Analyzing trace with hash -1184373553, now seen corresponding path program 1 times
[2023-11-12 02:10:19,576 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:10:19,576 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400560435]
[2023-11-12 02:10:19,577 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:10:19,577 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:10:19,659 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:10:20,335 INFO  L134       CoverageAnalysis]: Checked inductivity of 115 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2023-11-12 02:10:20,336 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:10:20,336 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400560435]
[2023-11-12 02:10:20,336 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400560435] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:10:20,336 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:10:20,337 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-12 02:10:20,338 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944649177]
[2023-11-12 02:10:20,338 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:10:20,341 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:10:20,341 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:10:20,342 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:10:20,343 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:10:20,343 INFO  L87              Difference]: Start difference. First operand 13052 states and 15895 transitions. Second operand  has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:24,851 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-12 02:10:24,851 INFO  L93              Difference]: Finished difference Result 26889 states and 32590 transitions.
[2023-11-12 02:10:24,852 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-12 02:10:24,852 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 208
[2023-11-12 02:10:24,852 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-12 02:10:24,893 INFO  L225             Difference]: With dead ends: 26889
[2023-11-12 02:10:24,893 INFO  L226             Difference]: Without dead ends: 13839
[2023-11-12 02:10:24,909 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
[2023-11-12 02:10:24,911 INFO  L413           NwaCegarLoop]: 1084 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 2530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time
[2023-11-12 02:10:24,911 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 1213 Invalid, 2530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2521 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time]
[2023-11-12 02:10:24,932 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13839 states.
[2023-11-12 02:10:25,251 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 13839.
[2023-11-12 02:10:25,270 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13839 states, 13838 states have (on average 1.2058823529411764) internal successors, (16687), 13838 states have internal predecessors, (16687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:25,295 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13839 states to 13839 states and 16687 transitions.
[2023-11-12 02:10:25,295 INFO  L78                 Accepts]: Start accepts. Automaton has 13839 states and 16687 transitions. Word has length 208
[2023-11-12 02:10:25,295 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-12 02:10:25,296 INFO  L495      AbstractCegarLoop]: Abstraction has 13839 states and 16687 transitions.
[2023-11-12 02:10:25,296 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-12 02:10:25,296 INFO  L276                IsEmpty]: Start isEmpty. Operand 13839 states and 16687 transitions.
[2023-11-12 02:10:25,299 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 216
[2023-11-12 02:10:25,300 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-12 02:10:25,300 INFO  L195           NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:10:25,300 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-11-12 02:10:25,301 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-12 02:10:25,302 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:10:25,302 INFO  L85        PathProgramCache]: Analyzing trace with hash 25568218, now seen corresponding path program 1 times
[2023-11-12 02:10:25,302 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:10:25,302 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698863426]
[2023-11-12 02:10:25,303 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:10:25,303 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:10:25,364 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:10:25,576 INFO  L134       CoverageAnalysis]: Checked inductivity of 122 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:10:25,576 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:10:25,576 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698863426]
[2023-11-12 02:10:25,577 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698863426] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:10:25,577 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:10:25,577 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-12 02:10:25,577 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726824324]
[2023-11-12 02:10:25,577 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:10:25,578 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:10:25,579 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:10:25,580 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:10:25,580 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:10:25,580 INFO  L87              Difference]: Start difference. First operand 13839 states and 16687 transitions. Second operand  has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)