./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem07_label56.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem07_label56.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 15ed19eb5795bed80c0398d5ac36df37e483370c3431a4e2b1af686401d8c839
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-12-02 15:31:20,847 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-12-02 15:31:20,932 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf
[2023-12-02 15:31:20,937 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-12-02 15:31:20,937 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-12-02 15:31:20,962 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-12-02 15:31:20,963 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-12-02 15:31:20,963 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-12-02 15:31:20,964 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-12-02 15:31:20,965 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-12-02 15:31:20,965 INFO  L153        SettingsManager]:  * User list type=DISABLED
[2023-12-02 15:31:20,966 INFO  L151        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-12-02 15:31:20,966 INFO  L153        SettingsManager]:  * Explicit value domain=true
[2023-12-02 15:31:20,967 INFO  L153        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-12-02 15:31:20,967 INFO  L153        SettingsManager]:  * Octagon Domain=false
[2023-12-02 15:31:20,968 INFO  L153        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-12-02 15:31:20,968 INFO  L153        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-12-02 15:31:20,969 INFO  L153        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-12-02 15:31:20,969 INFO  L153        SettingsManager]:  * Interval Domain=false
[2023-12-02 15:31:20,970 INFO  L151        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-12-02 15:31:20,970 INFO  L153        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-12-02 15:31:20,975 INFO  L153        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-12-02 15:31:20,976 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-12-02 15:31:20,976 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-12-02 15:31:20,977 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-12-02 15:31:20,977 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-12-02 15:31:20,977 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-12-02 15:31:20,978 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-12-02 15:31:20,978 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-12-02 15:31:20,978 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-12-02 15:31:20,979 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-12-02 15:31:20,981 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-12-02 15:31:20,981 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-12-02 15:31:20,981 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-12-02 15:31:20,981 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-12-02 15:31:20,982 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-12-02 15:31:20,982 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-12-02 15:31:20,982 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-12-02 15:31:20,982 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-12-02 15:31:20,982 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-12-02 15:31:20,983 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-12-02 15:31:20,983 INFO  L153        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-12-02 15:31:20,983 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-12-02 15:31:20,983 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-12-02 15:31:20,983 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-12-02 15:31:20,984 INFO  L153        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-12-02 15:31:20,984 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-12-02 15:31:20,984 INFO  L153        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
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_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh/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_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh
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 -> Taipan
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 -> 15ed19eb5795bed80c0398d5ac36df37e483370c3431a4e2b1af686401d8c839
[2023-12-02 15:31:21,239 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-12-02 15:31:21,269 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-12-02 15:31:21,272 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-12-02 15:31:21,273 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-12-02 15:31:21,274 INFO  L274        PluginConnector]: CDTParser initialized
[2023-12-02 15:31:21,275 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/eca-rers2012/Problem07_label56.c
[2023-12-02 15:31:24,061 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-12-02 15:31:25,610 INFO  L384              CDTParser]: Found 1 translation units.
[2023-12-02 15:31:25,610 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/sv-benchmarks/c/eca-rers2012/Problem07_label56.c
[2023-12-02 15:31:25,769 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh/data/3937b8182/428501662e4547f08d3cf651bebe6faa/FLAG2206bf2f9
[2023-12-02 15:31:25,779 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh/data/3937b8182/428501662e4547f08d3cf651bebe6faa
[2023-12-02 15:31:25,782 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-12-02 15:31:25,783 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-12-02 15:31:25,785 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-12-02 15:31:25,785 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-12-02 15:31:25,790 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-12-02 15:31:25,790 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:31:25" (1/1) ...
[2023-12-02 15:31:25,791 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc63813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:31:25, skipping insertion in model container
[2023-12-02 15:31:25,791 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:31:25" (1/1) ...
[2023-12-02 15:31:26,591 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-12-02 15:31:37,853 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_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/sv-benchmarks/c/eca-rers2012/Problem07_label56.c[2773929,2773942]
[2023-12-02 15:31:37,937 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-12-02 15:31:37,947 INFO  L202         MainTranslator]: Completed pre-run
[2023-12-02 15:31:44,615 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_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/sv-benchmarks/c/eca-rers2012/Problem07_label56.c[2773929,2773942]
[2023-12-02 15:31:44,620 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-12-02 15:31:45,520 INFO  L206         MainTranslator]: Completed translation
[2023-12-02 15:31:45,520 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:31:45 WrapperNode
[2023-12-02 15:31:45,521 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-12-02 15:31:45,522 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-12-02 15:31:45,522 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-12-02 15:31:45,522 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-12-02 15:31:45,528 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:31:45" (1/1) ...
[2023-12-02 15:31:45,890 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:31:45" (1/1) ...
[2023-12-02 15:31:47,785 INFO  L138                Inliner]: procedures = 59, calls = 53, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 83774
[2023-12-02 15:31:47,786 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-12-02 15:31:47,786 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-12-02 15:31:47,787 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-12-02 15:31:47,787 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-12-02 15:31:47,794 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:31:45" (1/1) ...
[2023-12-02 15:31:47,795 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:31:45" (1/1) ...
[2023-12-02 15:31:48,140 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:31:45" (1/1) ...
[2023-12-02 15:31:48,141 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:31:45" (1/1) ...
[2023-12-02 15:31:49,178 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:31:45" (1/1) ...
[2023-12-02 15:31:49,353 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:31:45" (1/1) ...
[2023-12-02 15:31:49,513 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:31:45" (1/1) ...
[2023-12-02 15:31:49,603 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:31:45" (1/1) ...
[2023-12-02 15:31:49,883 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-12-02 15:31:49,884 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-12-02 15:31:49,884 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-12-02 15:31:49,885 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-12-02 15:31:49,885 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:31:45" (1/1) ...
[2023-12-02 15:31:49,891 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-12-02 15:31:49,900 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 15:31:49,911 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-12-02 15:31:49,914 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a858f5-f9ad-45e3-a4c3-0d30fc3c7f40/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-12-02 15:31:49,942 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-12-02 15:31:49,942 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-12-02 15:31:49,943 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-12-02 15:31:49,943 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-12-02 15:31:50,281 INFO  L241             CfgBuilder]: Building ICFG
[2023-12-02 15:31:50,282 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-12-02 15:32:29,707 INFO  L282             CfgBuilder]: Performing block encoding
[2023-12-02 15:32:30,548 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-12-02 15:32:30,548 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-12-02 15:32:30,553 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:32:30 BoogieIcfgContainer
[2023-12-02 15:32:30,553 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-12-02 15:32:30,556 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-12-02 15:32:30,556 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-12-02 15:32:30,558 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-12-02 15:32:30,559 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:31:25" (1/3) ...
[2023-12-02 15:32:30,559 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3adb6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:32:30, skipping insertion in model container
[2023-12-02 15:32:30,560 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:31:45" (2/3) ...
[2023-12-02 15:32:30,560 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3adb6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:32:30, skipping insertion in model container
[2023-12-02 15:32:30,560 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:32:30" (3/3) ...
[2023-12-02 15:32:30,561 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem07_label56.c
[2023-12-02 15:32:30,576 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-12-02 15:32:30,576 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-12-02 15:32:30,735 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-12-02 15:32:30,740 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=FINITE_AUTOMATA, 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;@528ab2c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-12-02 15:32:30,740 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-12-02 15:32:30,770 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 10135 states, 10133 states have (on average 1.9951643146156124) internal successors, (20217), 10134 states have internal predecessors, (20217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:32:31,551 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10086
[2023-12-02 15:32:31,551 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 15:32:31,557 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-12-02 15:32:31,560 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 15:32:31,568 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 15:32:31,576 INFO  L85        PathProgramCache]: Analyzing trace with hash 36537684, now seen corresponding path program 1 times
[2023-12-02 15:32:31,585 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 15:32:31,586 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655150127]
[2023-12-02 15:32:31,591 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 15:32:31,591 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 15:32:34,334 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 15:33:35,368 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 15:33:35,369 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 15:33:35,369 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655150127]
[2023-12-02 15:33:35,369 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655150127] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 15:33:35,370 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 15:33:35,371 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-12-02 15:33:35,372 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723054624]
[2023-12-02 15:33:35,373 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 15:33:35,385 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-12-02 15:33:35,385 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 15:33:35,416 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-12-02 15:33:35,417 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-12-02 15:33:35,447 INFO  L87              Difference]: Start difference. First operand  has 10135 states, 10133 states have (on average 1.9951643146156124) internal successors, (20217), 10134 states have internal predecessors, (20217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 2521.25) internal successors, (10085), 3 states have internal predecessors, (10085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:34:39,913 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 15:34:39,913 INFO  L93              Difference]: Finished difference Result 40533 states and 80861 transitions.
[2023-12-02 15:34:39,914 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-12-02 15:34:39,919 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2521.25) internal successors, (10085), 3 states have internal predecessors, (10085), 0 states have call successors, (0), 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 10085
[2023-12-02 15:34:39,940 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 15:34:40,077 INFO  L225             Difference]: With dead ends: 40533
[2023-12-02 15:34:40,077 INFO  L226             Difference]: Without dead ends: 30393
[2023-12-02 15:34:40,096 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
[2023-12-02 15:34:40,099 INFO  L413           NwaCegarLoop]: 1677 mSDtfsCounter, 11611 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 50319 mSolverCounterSat, 26079 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11611 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 76398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 26079 IncrementalHoareTripleChecker+Valid, 50319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.3s IncrementalHoareTripleChecker+Time
[2023-12-02 15:34:40,100 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11611 Valid, 1779 Invalid, 76398 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [26079 Valid, 50319 Invalid, 0 Unknown, 0 Unchecked, 63.3s Time]
[2023-12-02 15:34:40,148 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30393 states.
[2023-12-02 15:34:40,747 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30393 to 30393.
[2023-12-02 15:34:40,806 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30393 states, 30392 states have (on average 1.6114438010002632) internal successors, (48975), 30392 states have internal predecessors, (48975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:34:40,886 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30393 states to 30393 states and 48975 transitions.
[2023-12-02 15:34:40,887 INFO  L78                 Accepts]: Start accepts. Automaton has 30393 states and 48975 transitions. Word has length 10085
[2023-12-02 15:34:40,905 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 15:34:40,905 INFO  L495      AbstractCegarLoop]: Abstraction has 30393 states and 48975 transitions.
[2023-12-02 15:34:40,910 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2521.25) internal successors, (10085), 3 states have internal predecessors, (10085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:34:40,911 INFO  L276                IsEmpty]: Start isEmpty. Operand 30393 states and 48975 transitions.
[2023-12-02 15:34:41,933 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12985
[2023-12-02 15:34:41,933 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 15:34:41,942 INFO  L195           NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-02 15:34:41,943 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-12-02 15:34:41,943 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 15:34:41,944 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 15:34:41,948 INFO  L85        PathProgramCache]: Analyzing trace with hash 143664477, now seen corresponding path program 1 times
[2023-12-02 15:34:41,948 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 15:34:41,948 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703698987]
[2023-12-02 15:34:41,949 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 15:34:41,950 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 15:34:43,919 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 15:35:27,480 INFO  L134       CoverageAnalysis]: Checked inductivity of 2888 backedges. 2885 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2023-12-02 15:35:27,481 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 15:35:27,481 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703698987]
[2023-12-02 15:35:27,481 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703698987] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 15:35:27,481 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 15:35:27,484 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 15:35:27,484 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685987464]
[2023-12-02 15:35:27,484 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 15:35:27,500 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 15:35:27,500 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 15:35:27,512 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 15:35:27,512 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 15:35:27,516 INFO  L87              Difference]: Start difference. First operand 30393 states and 48975 transitions. Second operand  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:36:05,951 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 15:36:05,951 INFO  L93              Difference]: Finished difference Result 70915 states and 126650 transitions.
[2023-12-02 15:36:05,952 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 15:36:05,954 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 0 states have call successors, (0), 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 12984
[2023-12-02 15:36:05,958 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 15:36:06,064 INFO  L225             Difference]: With dead ends: 70915
[2023-12-02 15:36:06,065 INFO  L226             Difference]: Without dead ends: 50653
[2023-12-02 15:36:06,092 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
[2023-12-02 15:36:06,094 INFO  L413           NwaCegarLoop]: 5660 mSDtfsCounter, 10329 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 28847 mSolverCounterSat, 11758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10329 SdHoareTripleChecker+Valid, 5708 SdHoareTripleChecker+Invalid, 40605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11758 IncrementalHoareTripleChecker+Valid, 28847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.7s IncrementalHoareTripleChecker+Time
[2023-12-02 15:36:06,094 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10329 Valid, 5708 Invalid, 40605 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11758 Valid, 28847 Invalid, 0 Unknown, 0 Unchecked, 37.7s Time]
[2023-12-02 15:36:06,146 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50653 states.
[2023-12-02 15:36:06,775 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50653 to 50653.
[2023-12-02 15:36:06,815 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50653 states, 50652 states have (on average 1.5600963436784332) internal successors, (79022), 50652 states have internal predecessors, (79022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:36:06,891 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50653 states to 50653 states and 79022 transitions.
[2023-12-02 15:36:06,891 INFO  L78                 Accepts]: Start accepts. Automaton has 50653 states and 79022 transitions. Word has length 12984
[2023-12-02 15:36:06,894 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 15:36:06,895 INFO  L495      AbstractCegarLoop]: Abstraction has 50653 states and 79022 transitions.
[2023-12-02 15:36:06,897 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:36:06,897 INFO  L276                IsEmpty]: Start isEmpty. Operand 50653 states and 79022 transitions.
[2023-12-02 15:36:07,837 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12992
[2023-12-02 15:36:07,838 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 15:36:07,844 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-02 15:36:07,845 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-12-02 15:36:07,845 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 15:36:07,845 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 15:36:07,848 INFO  L85        PathProgramCache]: Analyzing trace with hash 284221710, now seen corresponding path program 1 times
[2023-12-02 15:36:07,849 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 15:36:07,849 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916594811]
[2023-12-02 15:36:07,850 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 15:36:07,850 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 15:36:09,863 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 15:36:48,487 INFO  L134       CoverageAnalysis]: Checked inductivity of 2905 backedges. 2895 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2023-12-02 15:36:48,487 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 15:36:48,487 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916594811]
[2023-12-02 15:36:48,488 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916594811] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 15:36:48,488 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 15:36:48,490 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 15:36:48,491 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264349620]
[2023-12-02 15:36:48,491 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 15:36:48,504 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 15:36:48,504 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 15:36:48,518 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 15:36:48,518 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 15:36:48,522 INFO  L87              Difference]: Start difference. First operand 50653 states and 79022 transitions. Second operand  has 3 states, 3 states have (on average 4327.666666666667) internal successors, (12983), 2 states have internal predecessors, (12983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:37:27,506 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 15:37:27,506 INFO  L93              Difference]: Finished difference Result 131695 states and 216791 transitions.
[2023-12-02 15:37:27,506 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 15:37:27,508 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4327.666666666667) internal successors, (12983), 2 states have internal predecessors, (12983), 0 states have call successors, (0), 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 12991
[2023-12-02 15:37:27,510 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 15:37:27,611 INFO  L225             Difference]: With dead ends: 131695
[2023-12-02 15:37:27,612 INFO  L226             Difference]: Without dead ends: 91173
[2023-12-02 15:37:27,641 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
[2023-12-02 15:37:27,642 INFO  L413           NwaCegarLoop]: 6908 mSDtfsCounter, 9080 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 30225 mSolverCounterSat, 11076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9080 SdHoareTripleChecker+Valid, 6956 SdHoareTripleChecker+Invalid, 41301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11076 IncrementalHoareTripleChecker+Valid, 30225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.0s IncrementalHoareTripleChecker+Time
[2023-12-02 15:37:27,643 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [9080 Valid, 6956 Invalid, 41301 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11076 Valid, 30225 Invalid, 0 Unknown, 0 Unchecked, 38.0s Time]
[2023-12-02 15:37:27,700 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 91173 states.
[2023-12-02 15:37:28,586 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 91173 to 91173.
[2023-12-02 15:37:28,658 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 91173 states, 91172 states have (on average 1.4765059448076163) internal successors, (134616), 91172 states have internal predecessors, (134616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:37:28,769 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 91173 states to 91173 states and 134616 transitions.
[2023-12-02 15:37:28,769 INFO  L78                 Accepts]: Start accepts. Automaton has 91173 states and 134616 transitions. Word has length 12991
[2023-12-02 15:37:28,772 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 15:37:28,772 INFO  L495      AbstractCegarLoop]: Abstraction has 91173 states and 134616 transitions.
[2023-12-02 15:37:28,774 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4327.666666666667) internal successors, (12983), 2 states have internal predecessors, (12983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:37:28,775 INFO  L276                IsEmpty]: Start isEmpty. Operand 91173 states and 134616 transitions.
[2023-12-02 15:37:29,853 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12998
[2023-12-02 15:37:29,853 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 15:37:29,859 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-12-02 15:37:29,859 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-12-02 15:37:29,860 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 15:37:29,860 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 15:37:29,864 INFO  L85        PathProgramCache]: Analyzing trace with hash 1215636159, now seen corresponding path program 1 times
[2023-12-02 15:37:29,864 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 15:37:29,864 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201245419]
[2023-12-02 15:37:29,865 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 15:37:29,865 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 15:37:31,862 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 15:38:08,228 INFO  L134       CoverageAnalysis]: Checked inductivity of 2917 backedges. 2901 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2023-12-02 15:38:08,228 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 15:38:08,228 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201245419]
[2023-12-02 15:38:08,229 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201245419] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 15:38:08,229 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 15:38:08,231 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 15:38:08,231 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899399566]
[2023-12-02 15:38:08,231 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 15:38:08,240 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 15:38:08,240 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 15:38:08,249 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 15:38:08,249 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 15:38:08,253 INFO  L87              Difference]: Start difference. First operand 91173 states and 134616 transitions. Second operand  has 3 states, 3 states have (on average 4327.666666666667) internal successors, (12983), 2 states have internal predecessors, (12983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:38:48,318 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 15:38:48,318 INFO  L93              Difference]: Finished difference Result 253255 states and 383573 transitions.
[2023-12-02 15:38:48,318 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 15:38:48,320 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4327.666666666667) internal successors, (12983), 2 states have internal predecessors, (12983), 0 states have call successors, (0), 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 12997
[2023-12-02 15:38:48,323 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 15:38:48,648 INFO  L225             Difference]: With dead ends: 253255
[2023-12-02 15:38:48,648 INFO  L226             Difference]: Without dead ends: 172213
[2023-12-02 15:38:48,691 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
[2023-12-02 15:38:48,692 INFO  L413           NwaCegarLoop]: 6657 mSDtfsCounter, 9197 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29971 mSolverCounterSat, 11039 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9197 SdHoareTripleChecker+Valid, 6705 SdHoareTripleChecker+Invalid, 41010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11039 IncrementalHoareTripleChecker+Valid, 29971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.6s IncrementalHoareTripleChecker+Time
[2023-12-02 15:38:48,693 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [9197 Valid, 6705 Invalid, 41010 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11039 Valid, 29971 Invalid, 0 Unknown, 0 Unchecked, 38.6s Time]
[2023-12-02 15:38:48,800 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 172213 states.
[2023-12-02 15:38:50,222 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 172213 to 172213.
[2023-12-02 15:38:50,336 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 172213 states, 172212 states have (on average 1.3797760899356606) internal successors, (237614), 172212 states have internal predecessors, (237614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:38:50,541 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 172213 states to 172213 states and 237614 transitions.
[2023-12-02 15:38:50,541 INFO  L78                 Accepts]: Start accepts. Automaton has 172213 states and 237614 transitions. Word has length 12997
[2023-12-02 15:38:50,544 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 15:38:50,544 INFO  L495      AbstractCegarLoop]: Abstraction has 172213 states and 237614 transitions.
[2023-12-02 15:38:50,546 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4327.666666666667) internal successors, (12983), 2 states have internal predecessors, (12983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:38:50,546 INFO  L276                IsEmpty]: Start isEmpty. Operand 172213 states and 237614 transitions.
[2023-12-02 15:38:51,939 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13008
[2023-12-02 15:38:51,939 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 15:38:51,947 INFO  L195           NwaCegarLoop]: trace histogram [3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-02 15:38:51,947 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-12-02 15:38:51,947 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 15:38:51,948 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 15:38:51,953 INFO  L85        PathProgramCache]: Analyzing trace with hash 178217268, now seen corresponding path program 1 times
[2023-12-02 15:38:51,953 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 15:38:51,953 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124897931]
[2023-12-02 15:38:51,955 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 15:38:51,955 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 15:38:53,949 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 15:39:36,101 INFO  L134       CoverageAnalysis]: Checked inductivity of 2934 backedges. 2908 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked.
[2023-12-02 15:39:36,101 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 15:39:36,101 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124897931]
[2023-12-02 15:39:36,101 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124897931] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 15:39:36,101 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 15:39:36,103 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 15:39:36,103 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710022775]
[2023-12-02 15:39:36,103 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 15:39:36,114 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 15:39:36,114 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 15:39:36,123 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 15:39:36,124 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 15:39:36,127 INFO  L87              Difference]: Start difference. First operand 172213 states and 237614 transitions. Second operand  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:40:16,825 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 15:40:16,825 INFO  L93              Difference]: Finished difference Result 496375 states and 692567 transitions.
[2023-12-02 15:40:16,826 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 15:40:16,828 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 0 states have call successors, (0), 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 13007
[2023-12-02 15:40:16,830 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 15:40:17,202 INFO  L225             Difference]: With dead ends: 496375
[2023-12-02 15:40:17,203 INFO  L226             Difference]: Without dead ends: 334293
[2023-12-02 15:40:17,419 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
[2023-12-02 15:40:17,433 INFO  L413           NwaCegarLoop]: 5665 mSDtfsCounter, 10847 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 27317 mSolverCounterSat, 13030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10847 SdHoareTripleChecker+Valid, 5713 SdHoareTripleChecker+Invalid, 40347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13030 IncrementalHoareTripleChecker+Valid, 27317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.4s IncrementalHoareTripleChecker+Time
[2023-12-02 15:40:17,433 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10847 Valid, 5713 Invalid, 40347 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13030 Valid, 27317 Invalid, 0 Unknown, 0 Unchecked, 38.4s Time]
[2023-12-02 15:40:17,621 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 334293 states.
[2023-12-02 15:40:20,453 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 334293 to 334293.
[2023-12-02 15:40:20,609 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 334293 states, 334292 states have (on average 1.2797195266413794) internal successors, (427800), 334292 states have internal predecessors, (427800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:40:21,040 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 334293 states to 334293 states and 427800 transitions.
[2023-12-02 15:40:21,040 INFO  L78                 Accepts]: Start accepts. Automaton has 334293 states and 427800 transitions. Word has length 13007
[2023-12-02 15:40:21,042 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 15:40:21,042 INFO  L495      AbstractCegarLoop]: Abstraction has 334293 states and 427800 transitions.
[2023-12-02 15:40:21,044 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:40:21,044 INFO  L276                IsEmpty]: Start isEmpty. Operand 334293 states and 427800 transitions.
[2023-12-02 15:40:22,552 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13043
[2023-12-02 15:40:22,552 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 15:40:22,555 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-12-02 15:40:22,556 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-12-02 15:40:22,556 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 15:40:22,556 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 15:40:22,559 INFO  L85        PathProgramCache]: Analyzing trace with hash -370493908, now seen corresponding path program 1 times
[2023-12-02 15:40:22,559 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 15:40:22,559 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157000392]
[2023-12-02 15:40:22,561 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 15:40:22,561 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 15:40:24,466 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 15:41:01,466 INFO  L134       CoverageAnalysis]: Checked inductivity of 3004 backedges. 2943 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked.
[2023-12-02 15:41:01,466 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 15:41:01,466 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157000392]
[2023-12-02 15:41:01,466 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157000392] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 15:41:01,467 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 15:41:01,469 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 15:41:01,469 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621359077]
[2023-12-02 15:41:01,469 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 15:41:01,476 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 15:41:01,476 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 15:41:01,483 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 15:41:01,484 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 15:41:01,487 INFO  L87              Difference]: Start difference. First operand 334293 states and 427800 transitions. Second operand  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 15:41:44,383 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 15:41:44,383 INFO  L93              Difference]: Finished difference Result 982615 states and 1263125 transitions.
[2023-12-02 15:41:44,384 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 15:41:44,386 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 0 states have call successors, (0), 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 13042
[2023-12-02 15:41:44,387 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 15:41:45,298 INFO  L225             Difference]: With dead ends: 982615
[2023-12-02 15:41:45,299 INFO  L226             Difference]: Without dead ends: 658453
[2023-12-02 15:41:45,422 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
[2023-12-02 15:41:45,423 INFO  L413           NwaCegarLoop]: 7705 mSDtfsCounter, 8806 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29677 mSolverCounterSat, 11670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8806 SdHoareTripleChecker+Valid, 7753 SdHoareTripleChecker+Invalid, 41347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11670 IncrementalHoareTripleChecker+Valid, 29677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.9s IncrementalHoareTripleChecker+Time
[2023-12-02 15:41:45,423 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [8806 Valid, 7753 Invalid, 41347 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11670 Valid, 29677 Invalid, 0 Unknown, 0 Unchecked, 38.9s Time]
[2023-12-02 15:41:45,819 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 658453 states.
[2023-12-02 15:41:51,420 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 658453 to 658453.
[2023-12-02 15:41:52,214 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 658453 states, 658452 states have (on average 1.2159185483528032) internal successors, (800624), 658452 states have internal predecessors, (800624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)