./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem07_label37.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/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_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem07_label37.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/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_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/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 3aa53faff32d3cefd7e292e9c760c2842331eee742cc346d26d4662e48b4b358
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-12-02 16:56:07,817 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-12-02 16:56:07,884 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf
[2023-12-02 16:56:07,889 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-12-02 16:56:07,890 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-12-02 16:56:07,912 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-12-02 16:56:07,912 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-12-02 16:56:07,913 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-12-02 16:56:07,913 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-12-02 16:56:07,914 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-12-02 16:56:07,914 INFO  L153        SettingsManager]:  * User list type=DISABLED
[2023-12-02 16:56:07,915 INFO  L151        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-12-02 16:56:07,916 INFO  L153        SettingsManager]:  * Explicit value domain=true
[2023-12-02 16:56:07,916 INFO  L153        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-12-02 16:56:07,917 INFO  L153        SettingsManager]:  * Octagon Domain=false
[2023-12-02 16:56:07,917 INFO  L153        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-12-02 16:56:07,917 INFO  L153        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-12-02 16:56:07,918 INFO  L153        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-12-02 16:56:07,918 INFO  L153        SettingsManager]:  * Interval Domain=false
[2023-12-02 16:56:07,919 INFO  L151        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-12-02 16:56:07,919 INFO  L153        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-12-02 16:56:07,922 INFO  L153        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-12-02 16:56:07,922 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-12-02 16:56:07,922 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-12-02 16:56:07,923 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-12-02 16:56:07,923 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-12-02 16:56:07,924 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-12-02 16:56:07,924 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-12-02 16:56:07,924 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-12-02 16:56:07,924 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-12-02 16:56:07,925 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-12-02 16:56:07,925 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-12-02 16:56:07,925 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-12-02 16:56:07,926 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-12-02 16:56:07,926 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-12-02 16:56:07,926 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-12-02 16:56:07,926 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-12-02 16:56:07,926 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-12-02 16:56:07,926 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-12-02 16:56:07,927 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-12-02 16:56:07,927 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-12-02 16:56:07,927 INFO  L153        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-12-02 16:56:07,927 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-12-02 16:56:07,927 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-12-02 16:56:07,928 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-12-02 16:56:07,928 INFO  L153        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-12-02 16:56:07,928 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-12-02 16:56:07,928 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_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/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_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/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 -> 3aa53faff32d3cefd7e292e9c760c2842331eee742cc346d26d4662e48b4b358
[2023-12-02 16:56:08,154 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-12-02 16:56:08,177 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-12-02 16:56:08,180 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-12-02 16:56:08,181 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-12-02 16:56:08,181 INFO  L274        PluginConnector]: CDTParser initialized
[2023-12-02 16:56:08,182 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/eca-rers2012/Problem07_label37.c
[2023-12-02 16:56:10,862 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-12-02 16:56:12,369 INFO  L384              CDTParser]: Found 1 translation units.
[2023-12-02 16:56:12,369 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/sv-benchmarks/c/eca-rers2012/Problem07_label37.c
[2023-12-02 16:56:12,510 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/bin/utaipan-verify-nQ1chXbOIh/data/5c751e265/391fd15bf1794168a48c8c92c67a4611/FLAG9b2e85e28
[2023-12-02 16:56:12,522 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/bin/utaipan-verify-nQ1chXbOIh/data/5c751e265/391fd15bf1794168a48c8c92c67a4611
[2023-12-02 16:56:12,524 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-12-02 16:56:12,525 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-12-02 16:56:12,526 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-12-02 16:56:12,526 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-12-02 16:56:12,529 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-12-02 16:56:12,530 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:56:12" (1/1) ...
[2023-12-02 16:56:12,531 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678ac1f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:12, skipping insertion in model container
[2023-12-02 16:56:12,531 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:56:12" (1/1) ...
[2023-12-02 16:56:13,287 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-12-02 16:56:23,979 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_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/sv-benchmarks/c/eca-rers2012/Problem07_label37.c[2770691,2770704]
[2023-12-02 16:56:24,043 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-12-02 16:56:24,053 INFO  L202         MainTranslator]: Completed pre-run
[2023-12-02 16:56:30,697 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_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/sv-benchmarks/c/eca-rers2012/Problem07_label37.c[2770691,2770704]
[2023-12-02 16:56:30,707 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-12-02 16:56:31,601 INFO  L206         MainTranslator]: Completed translation
[2023-12-02 16:56:31,602 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:31 WrapperNode
[2023-12-02 16:56:31,602 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-12-02 16:56:31,603 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-12-02 16:56:31,603 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-12-02 16:56:31,603 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-12-02 16:56:31,610 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:31" (1/1) ...
[2023-12-02 16:56:32,050 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:31" (1/1) ...
[2023-12-02 16:56:34,007 INFO  L138                Inliner]: procedures = 59, calls = 53, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 83774
[2023-12-02 16:56:34,008 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-12-02 16:56:34,009 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-12-02 16:56:34,009 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-12-02 16:56:34,009 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-12-02 16:56:34,016 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:31" (1/1) ...
[2023-12-02 16:56:34,016 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:31" (1/1) ...
[2023-12-02 16:56:34,308 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:31" (1/1) ...
[2023-12-02 16:56:34,308 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:31" (1/1) ...
[2023-12-02 16:56:35,219 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:31" (1/1) ...
[2023-12-02 16:56:35,403 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:31" (1/1) ...
[2023-12-02 16:56:35,634 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:31" (1/1) ...
[2023-12-02 16:56:35,722 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:31" (1/1) ...
[2023-12-02 16:56:36,042 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-12-02 16:56:36,043 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-12-02 16:56:36,044 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-12-02 16:56:36,044 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-12-02 16:56:36,050 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:31" (1/1) ...
[2023-12-02 16:56:36,059 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-12-02 16:56:36,070 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 16:56:36,090 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-12-02 16:56:36,108 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9b621b-4852-405e-ad0a-ca2dd6ea1be1/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-12-02 16:56:36,132 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-12-02 16:56:36,132 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-12-02 16:56:36,132 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-12-02 16:56:36,133 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-12-02 16:56:36,277 INFO  L241             CfgBuilder]: Building ICFG
[2023-12-02 16:56:36,279 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-12-02 16:57:16,537 INFO  L282             CfgBuilder]: Performing block encoding
[2023-12-02 16:57:17,537 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-12-02 16:57:17,537 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-12-02 16:57:17,543 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:57:17 BoogieIcfgContainer
[2023-12-02 16:57:17,544 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-12-02 16:57:17,546 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-12-02 16:57:17,547 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-12-02 16:57:17,550 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-12-02 16:57:17,550 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:56:12" (1/3) ...
[2023-12-02 16:57:17,551 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cbcd83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:57:17, skipping insertion in model container
[2023-12-02 16:57:17,551 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:31" (2/3) ...
[2023-12-02 16:57:17,551 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cbcd83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:57:17, skipping insertion in model container
[2023-12-02 16:57:17,552 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:57:17" (3/3) ...
[2023-12-02 16:57:17,553 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem07_label37.c
[2023-12-02 16:57:17,571 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-12-02 16:57:17,571 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-12-02 16:57:17,780 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-12-02 16:57:17,787 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;@67336900, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-12-02 16:57:17,787 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-12-02 16:57:17,825 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 16:57:18,572 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10086
[2023-12-02 16:57:18,572 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 16:57:18,578 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 16:57:18,581 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 16:57:18,588 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 16:57:18,594 INFO  L85        PathProgramCache]: Analyzing trace with hash 36532820, now seen corresponding path program 1 times
[2023-12-02 16:57:18,601 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 16:57:18,601 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398620869]
[2023-12-02 16:57:18,604 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 16:57:18,604 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 16:57:21,299 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 16:57:52,669 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 16:57:52,669 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 16:57:52,670 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398620869]
[2023-12-02 16:57:52,670 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398620869] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 16:57:52,671 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 16:57:52,673 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 16:57:52,675 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398823558]
[2023-12-02 16:57:52,676 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 16:57:52,698 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 16:57:52,699 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 16:57:52,750 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 16:57:52,752 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 16:57:52,795 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 3 states, 3 states have (on average 3361.6666666666665) internal successors, (10085), 2 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 16:58:30,604 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 16:58:30,604 INFO  L93              Difference]: Finished difference Result 30401 states and 60647 transitions.
[2023-12-02 16:58:30,606 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 16:58:30,610 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3361.6666666666665) internal successors, (10085), 2 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 16:58:30,626 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 16:58:30,759 INFO  L225             Difference]: With dead ends: 30401
[2023-12-02 16:58:30,760 INFO  L226             Difference]: Without dead ends: 20263
[2023-12-02 16:58:30,776 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 16:58:30,780 INFO  L413           NwaCegarLoop]: 4042 mSDtfsCounter, 416 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 30830 mSolverCounterSat, 12469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 4092 SdHoareTripleChecker+Invalid, 43299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 12469 IncrementalHoareTripleChecker+Valid, 30830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.1s IncrementalHoareTripleChecker+Time
[2023-12-02 16:58:30,781 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 4092 Invalid, 43299 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [12469 Valid, 30830 Invalid, 0 Unknown, 0 Unchecked, 37.1s Time]
[2023-12-02 16:58:30,828 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20263 states.
[2023-12-02 16:58:31,290 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20263 to 20263.
[2023-12-02 16:58:31,333 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20263 states, 20262 states have (on average 1.799279439344586) internal successors, (36457), 20262 states have internal predecessors, (36457), 0 states have call successors, (0), 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 16:58:31,397 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20263 states to 20263 states and 36457 transitions.
[2023-12-02 16:58:31,398 INFO  L78                 Accepts]: Start accepts. Automaton has 20263 states and 36457 transitions. Word has length 10085
[2023-12-02 16:58:31,417 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 16:58:31,417 INFO  L495      AbstractCegarLoop]: Abstraction has 20263 states and 36457 transitions.
[2023-12-02 16:58:31,421 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3361.6666666666665) internal successors, (10085), 2 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 16:58:31,421 INFO  L276                IsEmpty]: Start isEmpty. Operand 20263 states and 36457 transitions.
[2023-12-02 16:58:32,234 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10090
[2023-12-02 16:58:32,234 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 16:58:32,239 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:58:32,239 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-12-02 16:58:32,239 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 16:58:32,240 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 16:58:32,243 INFO  L85        PathProgramCache]: Analyzing trace with hash -505733508, now seen corresponding path program 1 times
[2023-12-02 16:58:32,244 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 16:58:32,244 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465029361]
[2023-12-02 16:58:32,245 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 16:58:32,245 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 16:58:33,653 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 16:58:57,409 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 16:58:57,409 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 16:58:57,409 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465029361]
[2023-12-02 16:58:57,410 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465029361] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 16:58:57,410 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 16:58:57,412 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 16:58:57,413 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803750697]
[2023-12-02 16:58:57,413 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 16:58:57,430 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 16:58:57,430 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 16:58:57,440 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 16:58:57,441 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 16:58:57,443 INFO  L87              Difference]: Start difference. First operand 20263 states and 36457 transitions. Second operand  has 3 states, 3 states have (on average 3363.0) internal successors, (10089), 2 states have internal predecessors, (10089), 0 states have call successors, (0), 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 16:59:33,877 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 16:59:33,877 INFO  L93              Difference]: Finished difference Result 60785 states and 109368 transitions.
[2023-12-02 16:59:33,878 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 16:59:33,880 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3363.0) internal successors, (10089), 2 states have internal predecessors, (10089), 0 states have call successors, (0), 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 10089
[2023-12-02 16:59:33,880 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 16:59:33,948 INFO  L225             Difference]: With dead ends: 60785
[2023-12-02 16:59:33,948 INFO  L226             Difference]: Without dead ends: 40523
[2023-12-02 16:59:33,965 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 16:59:33,967 INFO  L413           NwaCegarLoop]: 4825 mSDtfsCounter, 13805 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 28583 mSolverCounterSat, 11758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13805 SdHoareTripleChecker+Valid, 4873 SdHoareTripleChecker+Invalid, 40341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11758 IncrementalHoareTripleChecker+Valid, 28583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.8s IncrementalHoareTripleChecker+Time
[2023-12-02 16:59:33,967 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [13805 Valid, 4873 Invalid, 40341 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11758 Valid, 28583 Invalid, 0 Unknown, 0 Unchecked, 35.8s Time]
[2023-12-02 16:59:34,002 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40523 states.
[2023-12-02 16:59:34,436 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40523 to 40523.
[2023-12-02 16:59:34,470 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 40523 states, 40522 states have (on average 1.610680617935936) internal successors, (65268), 40522 states have internal predecessors, (65268), 0 states have call successors, (0), 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 16:59:34,522 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40523 states to 40523 states and 65268 transitions.
[2023-12-02 16:59:34,523 INFO  L78                 Accepts]: Start accepts. Automaton has 40523 states and 65268 transitions. Word has length 10089
[2023-12-02 16:59:34,524 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 16:59:34,524 INFO  L495      AbstractCegarLoop]: Abstraction has 40523 states and 65268 transitions.
[2023-12-02 16:59:34,526 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3363.0) internal successors, (10089), 2 states have internal predecessors, (10089), 0 states have call successors, (0), 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 16:59:34,527 INFO  L276                IsEmpty]: Start isEmpty. Operand 40523 states and 65268 transitions.
[2023-12-02 16:59:35,122 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10092
[2023-12-02 16:59:35,122 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 16:59:35,127 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:35,128 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-12-02 16:59:35,128 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 16:59:35,128 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 16:59:35,131 INFO  L85        PathProgramCache]: Analyzing trace with hash -1999658089, now seen corresponding path program 1 times
[2023-12-02 16:59:35,131 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 16:59:35,132 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280676592]
[2023-12-02 16:59:35,133 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 16:59:35,133 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 16:59:36,511 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 17:00:01,184 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 17:00:01,184 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 17:00:01,185 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280676592]
[2023-12-02 17:00:01,185 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280676592] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 17:00:01,185 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 17:00:01,187 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 17:00:01,187 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286656702]
[2023-12-02 17:00:01,188 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 17:00:01,197 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 17:00:01,198 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 17:00:01,207 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 17:00:01,208 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 17:00:01,211 INFO  L87              Difference]: Start difference. First operand 40523 states and 65268 transitions. Second operand  has 3 states, 3 states have (on average 3363.6666666666665) internal successors, (10091), 2 states have internal predecessors, (10091), 0 states have call successors, (0), 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 17:00:36,669 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 17:00:36,669 INFO  L93              Difference]: Finished difference Result 121565 states and 195801 transitions.
[2023-12-02 17:00:36,669 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 17:00:36,671 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3363.6666666666665) internal successors, (10091), 2 states have internal predecessors, (10091), 0 states have call successors, (0), 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 10091
[2023-12-02 17:00:36,671 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 17:00:36,758 INFO  L225             Difference]: With dead ends: 121565
[2023-12-02 17:00:36,758 INFO  L226             Difference]: Without dead ends: 81043
[2023-12-02 17:00:36,792 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 17:00:36,793 INFO  L413           NwaCegarLoop]: 4817 mSDtfsCounter, 13625 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 28708 mSolverCounterSat, 11677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13625 SdHoareTripleChecker+Valid, 4865 SdHoareTripleChecker+Invalid, 40385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11677 IncrementalHoareTripleChecker+Valid, 28708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.7s IncrementalHoareTripleChecker+Time
[2023-12-02 17:00:36,794 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [13625 Valid, 4865 Invalid, 40385 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11677 Valid, 28708 Invalid, 0 Unknown, 0 Unchecked, 34.7s Time]
[2023-12-02 17:00:36,844 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 81043 states.
[2023-12-02 17:00:37,669 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 81043 to 81043.
[2023-12-02 17:00:37,726 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 81043 states, 81042 states have (on average 1.467288566422349) internal successors, (118912), 81042 states have internal predecessors, (118912), 0 states have call successors, (0), 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 17:00:37,824 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81043 states to 81043 states and 118912 transitions.
[2023-12-02 17:00:37,824 INFO  L78                 Accepts]: Start accepts. Automaton has 81043 states and 118912 transitions. Word has length 10091
[2023-12-02 17:00:37,826 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 17:00:37,826 INFO  L495      AbstractCegarLoop]: Abstraction has 81043 states and 118912 transitions.
[2023-12-02 17:00:37,828 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3363.6666666666665) internal successors, (10091), 2 states have internal predecessors, (10091), 0 states have call successors, (0), 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 17:00:37,828 INFO  L276                IsEmpty]: Start isEmpty. Operand 81043 states and 118912 transitions.
[2023-12-02 17:00:38,599 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10103
[2023-12-02 17:00:38,599 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 17:00:38,604 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:38,605 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-12-02 17:00:38,605 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 17:00:38,605 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 17:00:38,610 INFO  L85        PathProgramCache]: Analyzing trace with hash 1231167968, now seen corresponding path program 1 times
[2023-12-02 17:00:38,610 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 17:00:38,610 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85073918]
[2023-12-02 17:00:38,612 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 17:00:38,612 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 17:00:40,114 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 17:01:05,896 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-12-02 17:01:05,896 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 17:01:05,897 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85073918]
[2023-12-02 17:01:05,897 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85073918] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 17:01:05,897 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 17:01:05,899 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 17:01:05,899 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804885174]
[2023-12-02 17:01:05,899 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 17:01:05,908 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 17:01:05,908 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 17:01:05,918 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 17:01:05,918 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 17:01:05,921 INFO  L87              Difference]: Start difference. First operand 81043 states and 118912 transitions. Second operand  has 3 states, 3 states have (on average 3365.6666666666665) internal successors, (10097), 2 states have internal predecessors, (10097), 0 states have call successors, (0), 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 17:01:45,355 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 17:01:45,355 INFO  L93              Difference]: Finished difference Result 243125 states and 356733 transitions.
[2023-12-02 17:01:45,355 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 17:01:45,357 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3365.6666666666665) internal successors, (10097), 2 states have internal predecessors, (10097), 0 states have call successors, (0), 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 10102
[2023-12-02 17:01:45,357 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 17:01:45,532 INFO  L225             Difference]: With dead ends: 243125
[2023-12-02 17:01:45,532 INFO  L226             Difference]: Without dead ends: 162083
[2023-12-02 17:01:45,571 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 17:01:45,573 INFO  L413           NwaCegarLoop]: 6088 mSDtfsCounter, 13413 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 27411 mSolverCounterSat, 13030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13413 SdHoareTripleChecker+Valid, 6136 SdHoareTripleChecker+Invalid, 40441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13030 IncrementalHoareTripleChecker+Valid, 27411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.1s IncrementalHoareTripleChecker+Time
[2023-12-02 17:01:45,573 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [13413 Valid, 6136 Invalid, 40441 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13030 Valid, 27411 Invalid, 0 Unknown, 0 Unchecked, 38.1s Time]
[2023-12-02 17:01:45,700 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 162083 states.
[2023-12-02 17:01:47,022 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 162083 to 162083.
[2023-12-02 17:01:47,136 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 162083 states, 162082 states have (on average 1.3329549240507892) internal successors, (216048), 162082 states have internal predecessors, (216048), 0 states have call successors, (0), 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 17:01:47,322 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 162083 states to 162083 states and 216048 transitions.
[2023-12-02 17:01:47,322 INFO  L78                 Accepts]: Start accepts. Automaton has 162083 states and 216048 transitions. Word has length 10102
[2023-12-02 17:01:47,324 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 17:01:47,324 INFO  L495      AbstractCegarLoop]: Abstraction has 162083 states and 216048 transitions.
[2023-12-02 17:01:47,326 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3365.6666666666665) internal successors, (10097), 2 states have internal predecessors, (10097), 0 states have call successors, (0), 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 17:01:47,326 INFO  L276                IsEmpty]: Start isEmpty. Operand 162083 states and 216048 transitions.
[2023-12-02 17:01:48,534 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10134
[2023-12-02 17:01:48,534 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 17:01:48,540 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:01:48,540 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-12-02 17:01:48,541 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 17:01:48,541 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 17:01:48,545 INFO  L85        PathProgramCache]: Analyzing trace with hash -682655026, now seen corresponding path program 1 times
[2023-12-02 17:01:48,546 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 17:01:48,546 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485236700]
[2023-12-02 17:01:48,548 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 17:01:48,548 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 17:01:50,034 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 17:02:13,265 INFO  L134       CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 17:02:13,265 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 17:02:13,266 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485236700]
[2023-12-02 17:02:13,266 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485236700] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 17:02:13,266 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 17:02:13,267 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 17:02:13,267 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961266739]
[2023-12-02 17:02:13,268 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 17:02:13,277 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 17:02:13,278 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 17:02:13,284 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 17:02:13,284 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 17:02:13,287 INFO  L87              Difference]: Start difference. First operand 162083 states and 216048 transitions. Second operand  has 3 states, 3 states have (on average 3377.6666666666665) internal successors, (10133), 2 states have internal predecessors, (10133), 0 states have call successors, (0), 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 17:02:52,090 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 17:02:52,090 INFO  L93              Difference]: Finished difference Result 486245 states and 648141 transitions.
[2023-12-02 17:02:52,091 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 17:02:52,092 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3377.6666666666665) internal successors, (10133), 2 states have internal predecessors, (10133), 0 states have call successors, (0), 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 10133
[2023-12-02 17:02:52,093 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 17:02:52,497 INFO  L225             Difference]: With dead ends: 486245
[2023-12-02 17:02:52,497 INFO  L226             Difference]: Without dead ends: 324163
[2023-12-02 17:02:52,555 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 17:02:52,556 INFO  L413           NwaCegarLoop]: 7310 mSDtfsCounter, 11707 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 30394 mSolverCounterSat, 11081 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11707 SdHoareTripleChecker+Valid, 7359 SdHoareTripleChecker+Invalid, 41475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11081 IncrementalHoareTripleChecker+Valid, 30394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.8s IncrementalHoareTripleChecker+Time
[2023-12-02 17:02:52,556 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11707 Valid, 7359 Invalid, 41475 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11081 Valid, 30394 Invalid, 0 Unknown, 0 Unchecked, 36.8s Time]
[2023-12-02 17:02:52,748 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 324163 states.
[2023-12-02 17:02:55,499 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 324163 to 324163.
[2023-12-02 17:02:55,663 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 324163 states, 324162 states have (on average 1.2554155021254805) internal successors, (406958), 324162 states have internal predecessors, (406958), 0 states have call successors, (0), 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 17:02:56,114 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 324163 states to 324163 states and 406958 transitions.
[2023-12-02 17:02:56,115 INFO  L78                 Accepts]: Start accepts. Automaton has 324163 states and 406958 transitions. Word has length 10133
[2023-12-02 17:02:56,116 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 17:02:56,116 INFO  L495      AbstractCegarLoop]: Abstraction has 324163 states and 406958 transitions.
[2023-12-02 17:02:56,118 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3377.6666666666665) internal successors, (10133), 2 states have internal predecessors, (10133), 0 states have call successors, (0), 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 17:02:56,118 INFO  L276                IsEmpty]: Start isEmpty. Operand 324163 states and 406958 transitions.
[2023-12-02 17:02:57,261 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10227
[2023-12-02 17:02:57,261 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 17:02:57,265 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:02:57,266 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-12-02 17:02:57,266 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 17:02:57,266 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 17:02:57,270 INFO  L85        PathProgramCache]: Analyzing trace with hash 1352248380, now seen corresponding path program 1 times
[2023-12-02 17:02:57,271 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 17:02:57,271 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45628469]
[2023-12-02 17:02:57,272 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 17:02:57,273 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 17:02:58,681 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 17:03:21,810 INFO  L134       CoverageAnalysis]: Checked inductivity of 183 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked.
[2023-12-02 17:03:21,811 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 17:03:21,811 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45628469]
[2023-12-02 17:03:21,811 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45628469] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 17:03:21,811 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 17:03:21,813 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 17:03:21,813 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986141146]
[2023-12-02 17:03:21,813 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 17:03:21,821 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 17:03:21,821 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 17:03:21,828 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 17:03:21,828 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 17:03:21,831 INFO  L87              Difference]: Start difference. First operand 324163 states and 406958 transitions. Second operand  has 3 states, 3 states have (on average 3395.6666666666665) internal successors, (10187), 2 states have internal predecessors, (10187), 0 states have call successors, (0), 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 17:04:01,360 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 17:04:01,360 INFO  L93              Difference]: Finished difference Result 972485 states and 1220871 transitions.
[2023-12-02 17:04:01,361 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 17:04:01,363 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3395.6666666666665) internal successors, (10187), 2 states have internal predecessors, (10187), 0 states have call successors, (0), 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 10226
[2023-12-02 17:04:01,363 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 17:04:02,204 INFO  L225             Difference]: With dead ends: 972485
[2023-12-02 17:04:02,204 INFO  L226             Difference]: Without dead ends: 648323
[2023-12-02 17:04:02,328 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 17:04:02,329 INFO  L413           NwaCegarLoop]: 5911 mSDtfsCounter, 12499 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29708 mSolverCounterSat, 11034 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12499 SdHoareTripleChecker+Valid, 5959 SdHoareTripleChecker+Invalid, 40742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11034 IncrementalHoareTripleChecker+Valid, 29708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.1s IncrementalHoareTripleChecker+Time
[2023-12-02 17:04:02,330 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12499 Valid, 5959 Invalid, 40742 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11034 Valid, 29708 Invalid, 0 Unknown, 0 Unchecked, 36.1s Time]
[2023-12-02 17:04:02,711 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 648323 states.
[2023-12-02 17:04:08,120 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 648323 to 648323.
[2023-12-02 17:04:08,444 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 648323 states, 648322 states have (on average 1.1914480767273052) internal successors, (772442), 648322 states have internal predecessors, (772442), 0 states have call successors, (0), 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 17:04:09,761 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 648323 states to 648323 states and 772442 transitions.
[2023-12-02 17:04:09,762 INFO  L78                 Accepts]: Start accepts. Automaton has 648323 states and 772442 transitions. Word has length 10226
[2023-12-02 17:04:09,762 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 17:04:09,762 INFO  L495      AbstractCegarLoop]: Abstraction has 648323 states and 772442 transitions.
[2023-12-02 17:04:09,764 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3395.6666666666665) internal successors, (10187), 2 states have internal predecessors, (10187), 0 states have call successors, (0), 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 17:04:09,764 INFO  L276                IsEmpty]: Start isEmpty. Operand 648323 states and 772442 transitions.
[2023-12-02 17:04:11,596 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10321
[2023-12-02 17:04:11,596 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 17:04:11,598 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:04:11,598 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2023-12-02 17:04:11,599 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 17:04:11,599 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 17:04:11,600 INFO  L85        PathProgramCache]: Analyzing trace with hash 1340222157, now seen corresponding path program 1 times
[2023-12-02 17:04:11,601 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 17:04:11,601 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807437983]
[2023-12-02 17:04:11,602 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 17:04:11,602 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 17:04:13,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 17:04:48,461 INFO  L134       CoverageAnalysis]: Checked inductivity of 233 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 17:04:48,461 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 17:04:48,461 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807437983]
[2023-12-02 17:04:48,461 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807437983] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 17:04:48,461 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 17:04:48,463 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 17:04:48,463 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758503071]
[2023-12-02 17:04:48,463 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 17:04:48,469 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 17:04:48,469 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 17:04:48,476 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 17:04:48,476 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 17:04:48,478 INFO  L87              Difference]: Start difference. First operand 648323 states and 772442 transitions. Second operand  has 3 states, 3 states have (on average 3440.0) internal successors, (10320), 2 states have internal predecessors, (10320), 0 states have call successors, (0), 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 17:05:23,796 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 17:05:23,796 INFO  L93              Difference]: Finished difference Result 1296645 states and 1544883 transitions.
[2023-12-02 17:05:23,796 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 17:05:23,798 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3440.0) internal successors, (10320), 2 states have internal predecessors, (10320), 0 states have call successors, (0), 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 10320
[2023-12-02 17:05:23,799 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 17:05:24,562 INFO  L225             Difference]: With dead ends: 1296645
[2023-12-02 17:05:24,562 INFO  L226             Difference]: Without dead ends: 648323
[2023-12-02 17:05:24,767 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 17:05:24,768 INFO  L413           NwaCegarLoop]: 9994 mSDtfsCounter, 9977 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29469 mSolverCounterSat, 4825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9977 SdHoareTripleChecker+Valid, 10042 SdHoareTripleChecker+Invalid, 34294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4825 IncrementalHoareTripleChecker+Valid, 29469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.1s IncrementalHoareTripleChecker+Time
[2023-12-02 17:05:24,768 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [9977 Valid, 10042 Invalid, 34294 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4825 Valid, 29469 Invalid, 0 Unknown, 0 Unchecked, 31.1s Time]
[2023-12-02 17:05:25,451 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 648323 states.
[2023-12-02 17:05:30,928 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 648323 to 648323.
[2023-12-02 17:05:31,284 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 648323 states, 648322 states have (on average 1.1907077038878828) internal successors, (771962), 648322 states have internal predecessors, (771962), 0 states have call successors, (0), 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 17:05:32,534 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 648323 states to 648323 states and 771962 transitions.
[2023-12-02 17:05:32,534 INFO  L78                 Accepts]: Start accepts. Automaton has 648323 states and 771962 transitions. Word has length 10320
[2023-12-02 17:05:32,535 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 17:05:32,535 INFO  L495      AbstractCegarLoop]: Abstraction has 648323 states and 771962 transitions.
[2023-12-02 17:05:32,537 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3440.0) internal successors, (10320), 2 states have internal predecessors, (10320), 0 states have call successors, (0), 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 17:05:32,537 INFO  L276                IsEmpty]: Start isEmpty. Operand 648323 states and 771962 transitions.
[2023-12-02 17:05:34,124 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10561
[2023-12-02 17:05:34,124 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 17:05:34,126 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-12-02 17:05:34,127 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2023-12-02 17:05:34,127 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 17:05:34,127 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 17:05:34,128 INFO  L85        PathProgramCache]: Analyzing trace with hash -416910696, now seen corresponding path program 1 times
[2023-12-02 17:05:34,129 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 17:05:34,129 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869889852]
[2023-12-02 17:05:34,129 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 17:05:34,130 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 17:05:35,508 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 17:06:01,677 INFO  L134       CoverageAnalysis]: Checked inductivity of 472 backedges. 472 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 17:06:01,678 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 17:06:01,678 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869889852]
[2023-12-02 17:06:01,678 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869889852] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 17:06:01,678 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 17:06:01,681 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 17:06:01,681 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574219514]
[2023-12-02 17:06:01,682 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 17:06:01,690 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 17:06:01,690 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 17:06:01,698 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 17:06:01,699 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 17:06:01,701 INFO  L87              Difference]: Start difference. First operand 648323 states and 771962 transitions. Second operand  has 3 states, 3 states have (on average 3520.0) internal successors, (10560), 2 states have internal predecessors, (10560), 0 states have call successors, (0), 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 17:06:45,408 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 17:06:45,408 INFO  L93              Difference]: Finished difference Result 1944965 states and 2315883 transitions.
[2023-12-02 17:06:45,409 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 17:06:45,411 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3520.0) internal successors, (10560), 2 states have internal predecessors, (10560), 0 states have call successors, (0), 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 10560
[2023-12-02 17:06:45,411 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 17:06:46,945 INFO  L225             Difference]: With dead ends: 1944965
[2023-12-02 17:06:46,945 INFO  L226             Difference]: Without dead ends: 1296643
[2023-12-02 17:06:47,201 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 17:06:47,201 INFO  L413           NwaCegarLoop]: 6136 mSDtfsCounter, 12053 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 30341 mSolverCounterSat, 10501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12053 SdHoareTripleChecker+Valid, 6184 SdHoareTripleChecker+Invalid, 40842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10501 IncrementalHoareTripleChecker+Valid, 30341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.9s IncrementalHoareTripleChecker+Time
[2023-12-02 17:06:47,202 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12053 Valid, 6184 Invalid, 40842 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10501 Valid, 30341 Invalid, 0 Unknown, 0 Unchecked, 36.9s Time]
[2023-12-02 17:06:48,731 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1296643 states.