./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem07_label14.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d90e2361-16f7-400a-843b-bc2cfa2fabe6/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d90e2361-16f7-400a-843b-bc2cfa2fabe6/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_d90e2361-16f7-400a-843b-bc2cfa2fabe6/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d90e2361-16f7-400a-843b-bc2cfa2fabe6/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem07_label14.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d90e2361-16f7-400a-843b-bc2cfa2fabe6/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_d90e2361-16f7-400a-843b-bc2cfa2fabe6/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 5f9fca637959b0405b85bc0888663e9766bbda8452df25504c5ed522a839814d
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-12-02 18:17:32,646 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-12-02 18:17:32,709 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d90e2361-16f7-400a-843b-bc2cfa2fabe6/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf
[2023-12-02 18:17:32,714 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-12-02 18:17:32,715 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-12-02 18:17:32,740 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-12-02 18:17:32,741 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-12-02 18:17:32,741 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-12-02 18:17:32,742 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-12-02 18:17:32,742 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-12-02 18:17:32,743 INFO  L153        SettingsManager]:  * User list type=DISABLED
[2023-12-02 18:17:32,743 INFO  L151        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-12-02 18:17:32,744 INFO  L153        SettingsManager]:  * Explicit value domain=true
[2023-12-02 18:17:32,744 INFO  L153        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-12-02 18:17:32,745 INFO  L153        SettingsManager]:  * Octagon Domain=false
[2023-12-02 18:17:32,745 INFO  L153        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-12-02 18:17:32,746 INFO  L153        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-12-02 18:17:32,746 INFO  L153        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-12-02 18:17:32,747 INFO  L153        SettingsManager]:  * Interval Domain=false
[2023-12-02 18:17:32,747 INFO  L151        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-12-02 18:17:32,748 INFO  L153        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-12-02 18:17:32,749 INFO  L153        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-12-02 18:17:32,749 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-12-02 18:17:32,750 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-12-02 18:17:32,750 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-12-02 18:17:32,751 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-12-02 18:17:32,751 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-12-02 18:17:32,751 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-12-02 18:17:32,752 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-12-02 18:17:32,752 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-12-02 18:17:32,753 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-12-02 18:17:32,753 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-12-02 18:17:32,753 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-12-02 18:17:32,754 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-12-02 18:17:32,754 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-12-02 18:17:32,754 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-12-02 18:17:32,754 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-12-02 18:17:32,755 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-12-02 18:17:32,755 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-12-02 18:17:32,755 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-12-02 18:17:32,755 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-12-02 18:17:32,756 INFO  L153        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-12-02 18:17:32,756 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-12-02 18:17:32,756 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-12-02 18:17:32,756 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-12-02 18:17:32,756 INFO  L153        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-12-02 18:17:32,756 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-12-02 18:17:32,757 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_d90e2361-16f7-400a-843b-bc2cfa2fabe6/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_d90e2361-16f7-400a-843b-bc2cfa2fabe6/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 -> 5f9fca637959b0405b85bc0888663e9766bbda8452df25504c5ed522a839814d
[2023-12-02 18:17:32,985 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-12-02 18:17:33,005 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-12-02 18:17:33,008 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-12-02 18:17:33,009 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-12-02 18:17:33,009 INFO  L274        PluginConnector]: CDTParser initialized
[2023-12-02 18:17:33,011 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d90e2361-16f7-400a-843b-bc2cfa2fabe6/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/eca-rers2012/Problem07_label14.c
[2023-12-02 18:17:35,645 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-12-02 18:17:37,141 INFO  L384              CDTParser]: Found 1 translation units.
[2023-12-02 18:17:37,141 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d90e2361-16f7-400a-843b-bc2cfa2fabe6/sv-benchmarks/c/eca-rers2012/Problem07_label14.c
[2023-12-02 18:17:37,276 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d90e2361-16f7-400a-843b-bc2cfa2fabe6/bin/utaipan-verify-nQ1chXbOIh/data/225764510/6dd6887fedab4e63ac5b984196671e4e/FLAG0bad2558b
[2023-12-02 18:17:37,286 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d90e2361-16f7-400a-843b-bc2cfa2fabe6/bin/utaipan-verify-nQ1chXbOIh/data/225764510/6dd6887fedab4e63ac5b984196671e4e
[2023-12-02 18:17:37,288 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-12-02 18:17:37,290 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-12-02 18:17:37,291 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-12-02 18:17:37,291 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-12-02 18:17:37,296 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-12-02 18:17:37,296 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:17:37" (1/1) ...
[2023-12-02 18:17:37,298 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13959b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:37, skipping insertion in model container
[2023-12-02 18:17:37,298 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:17:37" (1/1) ...
[2023-12-02 18:17:38,207 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-12-02 18:17:48,589 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_d90e2361-16f7-400a-843b-bc2cfa2fabe6/sv-benchmarks/c/eca-rers2012/Problem07_label14.c[2774440,2774453]
[2023-12-02 18:17:48,659 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-12-02 18:17:48,669 INFO  L202         MainTranslator]: Completed pre-run
[2023-12-02 18:17:54,882 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_d90e2361-16f7-400a-843b-bc2cfa2fabe6/sv-benchmarks/c/eca-rers2012/Problem07_label14.c[2774440,2774453]
[2023-12-02 18:17:54,886 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-12-02 18:17:55,615 INFO  L206         MainTranslator]: Completed translation
[2023-12-02 18:17:55,615 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:55 WrapperNode
[2023-12-02 18:17:55,615 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-12-02 18:17:55,616 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-12-02 18:17:55,616 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-12-02 18:17:55,616 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-12-02 18:17:55,621 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:55" (1/1) ...
[2023-12-02 18:17:55,991 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:55" (1/1) ...
[2023-12-02 18:17:57,859 INFO  L138                Inliner]: procedures = 59, calls = 53, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 83774
[2023-12-02 18:17:57,860 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-12-02 18:17:57,860 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-12-02 18:17:57,860 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-12-02 18:17:57,860 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-12-02 18:17:57,867 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:55" (1/1) ...
[2023-12-02 18:17:57,867 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:55" (1/1) ...
[2023-12-02 18:17:58,177 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:55" (1/1) ...
[2023-12-02 18:17:58,177 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:55" (1/1) ...
[2023-12-02 18:17:58,926 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:55" (1/1) ...
[2023-12-02 18:17:59,167 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:55" (1/1) ...
[2023-12-02 18:17:59,344 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:55" (1/1) ...
[2023-12-02 18:17:59,432 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:55" (1/1) ...
[2023-12-02 18:17:59,711 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-12-02 18:17:59,712 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-12-02 18:17:59,712 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-12-02 18:17:59,712 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-12-02 18:17:59,713 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:55" (1/1) ...
[2023-12-02 18:17:59,722 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-12-02 18:17:59,731 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d90e2361-16f7-400a-843b-bc2cfa2fabe6/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 18:17:59,744 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d90e2361-16f7-400a-843b-bc2cfa2fabe6/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-12-02 18:17:59,753 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d90e2361-16f7-400a-843b-bc2cfa2fabe6/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-12-02 18:17:59,779 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-12-02 18:17:59,779 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-12-02 18:17:59,780 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-12-02 18:17:59,780 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-12-02 18:17:59,904 INFO  L241             CfgBuilder]: Building ICFG
[2023-12-02 18:17:59,906 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-12-02 18:18:39,472 INFO  L282             CfgBuilder]: Performing block encoding
[2023-12-02 18:18:40,471 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-12-02 18:18:40,471 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-12-02 18:18:40,478 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:18:40 BoogieIcfgContainer
[2023-12-02 18:18:40,478 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-12-02 18:18:40,480 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-12-02 18:18:40,481 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-12-02 18:18:40,484 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-12-02 18:18:40,484 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:17:37" (1/3) ...
[2023-12-02 18:18:40,485 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c3e1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:18:40, skipping insertion in model container
[2023-12-02 18:18:40,485 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:55" (2/3) ...
[2023-12-02 18:18:40,486 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c3e1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:18:40, skipping insertion in model container
[2023-12-02 18:18:40,486 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:18:40" (3/3) ...
[2023-12-02 18:18:40,487 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem07_label14.c
[2023-12-02 18:18:40,504 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-12-02 18:18:40,504 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-12-02 18:18:40,704 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-12-02 18:18:40,711 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;@79aaaef4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-12-02 18:18:40,711 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-12-02 18:18:40,749 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 18:18:41,393 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10086
[2023-12-02 18:18:41,394 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 18:18:41,399 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 18:18:41,402 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 18:18:41,406 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 18:18:41,411 INFO  L85        PathProgramCache]: Analyzing trace with hash 36538452, now seen corresponding path program 1 times
[2023-12-02 18:18:41,418 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 18:18:41,419 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481497925]
[2023-12-02 18:18:41,422 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 18:18:41,422 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 18:18:44,352 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 18:19:11,044 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 18:19:11,044 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 18:19:11,045 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481497925]
[2023-12-02 18:19:11,045 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481497925] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 18:19:11,045 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 18:19:11,046 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 18:19:11,048 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641085138]
[2023-12-02 18:19:11,048 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 18:19:11,064 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 18:19:11,064 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 18:19:11,100 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 18:19:11,100 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 18:19:11,126 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 18:19:48,085 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 18:19:48,085 INFO  L93              Difference]: Finished difference Result 30401 states and 60647 transitions.
[2023-12-02 18:19:48,087 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 18:19:48,091 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 18:19:48,112 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 18:19:48,219 INFO  L225             Difference]: With dead ends: 30401
[2023-12-02 18:19:48,219 INFO  L226             Difference]: Without dead ends: 20263
[2023-12-02 18:19:48,235 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 18:19:48,238 INFO  L413           NwaCegarLoop]: 722 mSDtfsCounter, 431 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 33587 mSolverCounterSat, 12062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 45649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 12062 IncrementalHoareTripleChecker+Valid, 33587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.3s IncrementalHoareTripleChecker+Time
[2023-12-02 18:19:48,239 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 772 Invalid, 45649 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [12062 Valid, 33587 Invalid, 0 Unknown, 0 Unchecked, 36.3s Time]
[2023-12-02 18:19:48,275 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20263 states.
[2023-12-02 18:19:48,653 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20263 to 20263.
[2023-12-02 18:19:48,691 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20263 states, 20262 states have (on average 1.9627381304905736) internal successors, (39769), 20262 states have internal predecessors, (39769), 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 18:19:48,748 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20263 states to 20263 states and 39769 transitions.
[2023-12-02 18:19:48,749 INFO  L78                 Accepts]: Start accepts. Automaton has 20263 states and 39769 transitions. Word has length 10085
[2023-12-02 18:19:48,763 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 18:19:48,763 INFO  L495      AbstractCegarLoop]: Abstraction has 20263 states and 39769 transitions.
[2023-12-02 18:19:48,766 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 18:19:48,766 INFO  L276                IsEmpty]: Start isEmpty. Operand 20263 states and 39769 transitions.
[2023-12-02 18:19:49,375 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10091
[2023-12-02 18:19:49,375 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 18:19:49,380 INFO  L195           NwaCegarLoop]: trace histogram [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, 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 18:19:49,380 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-12-02 18:19:49,380 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 18:19:49,381 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 18:19:49,385 INFO  L85        PathProgramCache]: Analyzing trace with hash -1402531860, now seen corresponding path program 1 times
[2023-12-02 18:19:49,385 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 18:19:49,385 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810901208]
[2023-12-02 18:19:49,386 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 18:19:49,386 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 18:19:50,752 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 18:20:09,693 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 18:20:09,693 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 18:20:09,694 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810901208]
[2023-12-02 18:20:09,694 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810901208] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 18:20:09,694 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 18:20:09,696 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 18:20:09,696 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138268534]
[2023-12-02 18:20:09,696 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 18:20:09,709 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 18:20:09,709 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 18:20:09,724 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 18:20:09,725 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 18:20:09,728 INFO  L87              Difference]: Start difference. First operand 20263 states and 39769 transitions. Second operand  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 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 18:20:45,604 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 18:20:45,604 INFO  L93              Difference]: Finished difference Result 60785 states and 119304 transitions.
[2023-12-02 18:20:45,604 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 18:20:45,607 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 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 10090
[2023-12-02 18:20:45,607 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 18:20:45,682 INFO  L225             Difference]: With dead ends: 60785
[2023-12-02 18:20:45,683 INFO  L226             Difference]: Without dead ends: 40523
[2023-12-02 18:20:45,703 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 18:20:45,705 INFO  L413           NwaCegarLoop]: 4819 mSDtfsCounter, 13626 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 28708 mSolverCounterSat, 11677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13626 SdHoareTripleChecker+Valid, 4867 SdHoareTripleChecker+Invalid, 40385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11677 IncrementalHoareTripleChecker+Valid, 28708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.2s IncrementalHoareTripleChecker+Time
[2023-12-02 18:20:45,705 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [13626 Valid, 4867 Invalid, 40385 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11677 Valid, 28708 Invalid, 0 Unknown, 0 Unchecked, 35.2s Time]
[2023-12-02 18:20:45,747 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40523 states.
[2023-12-02 18:20:46,323 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40523 to 40523.
[2023-12-02 18:20:46,373 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 40523 states, 40522 states have (on average 1.735797838211342) internal successors, (70338), 40522 states have internal predecessors, (70338), 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 18:20:46,439 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40523 states to 40523 states and 70338 transitions.
[2023-12-02 18:20:46,439 INFO  L78                 Accepts]: Start accepts. Automaton has 40523 states and 70338 transitions. Word has length 10090
[2023-12-02 18:20:46,441 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 18:20:46,441 INFO  L495      AbstractCegarLoop]: Abstraction has 40523 states and 70338 transitions.
[2023-12-02 18:20:46,444 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 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 18:20:46,445 INFO  L276                IsEmpty]: Start isEmpty. Operand 40523 states and 70338 transitions.
[2023-12-02 18:20:47,218 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10101
[2023-12-02 18:20:47,218 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 18:20:47,223 INFO  L195           NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:47,224 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-12-02 18:20:47,224 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 18:20:47,224 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 18:20:47,229 INFO  L85        PathProgramCache]: Analyzing trace with hash 839538259, now seen corresponding path program 1 times
[2023-12-02 18:20:47,229 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 18:20:47,229 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463833959]
[2023-12-02 18:20:47,231 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 18:20:47,231 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 18:20:48,654 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 18:21:11,082 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 18:21:11,083 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 18:21:11,083 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463833959]
[2023-12-02 18:21:11,083 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463833959] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 18:21:11,083 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 18:21:11,085 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 18:21:11,085 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456694395]
[2023-12-02 18:21:11,086 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 18:21:11,096 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 18:21:11,096 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 18:21:11,105 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 18:21:11,105 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 18:21:11,110 INFO  L87              Difference]: Start difference. First operand 40523 states and 70338 transitions. Second operand  has 3 states, 3 states have (on average 3366.6666666666665) internal successors, (10100), 2 states have internal predecessors, (10100), 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 18:21:48,062 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 18:21:48,062 INFO  L93              Difference]: Finished difference Result 121565 states and 211011 transitions.
[2023-12-02 18:21:48,062 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 18:21:48,065 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3366.6666666666665) internal successors, (10100), 2 states have internal predecessors, (10100), 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 10100
[2023-12-02 18:21:48,065 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 18:21:48,263 INFO  L225             Difference]: With dead ends: 121565
[2023-12-02 18:21:48,263 INFO  L226             Difference]: Without dead ends: 81043
[2023-12-02 18:21:48,285 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 18:21:48,287 INFO  L413           NwaCegarLoop]: 7614 mSDtfsCounter, 11993 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 34988 mSolverCounterSat, 6982 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11993 SdHoareTripleChecker+Valid, 7663 SdHoareTripleChecker+Invalid, 41970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6982 IncrementalHoareTripleChecker+Valid, 34988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.2s IncrementalHoareTripleChecker+Time
[2023-12-02 18:21:48,287 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11993 Valid, 7663 Invalid, 41970 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6982 Valid, 34988 Invalid, 0 Unknown, 0 Unchecked, 36.2s Time]
[2023-12-02 18:21:48,329 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 81043 states.
[2023-12-02 18:21:48,851 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 81043 to 81043.
[2023-12-02 18:21:48,914 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 81043 states, 81042 states have (on average 1.554329853656129) internal successors, (125966), 81042 states have internal predecessors, (125966), 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 18:21:48,999 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81043 states to 81043 states and 125966 transitions.
[2023-12-02 18:21:48,999 INFO  L78                 Accepts]: Start accepts. Automaton has 81043 states and 125966 transitions. Word has length 10100
[2023-12-02 18:21:49,001 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 18:21:49,002 INFO  L495      AbstractCegarLoop]: Abstraction has 81043 states and 125966 transitions.
[2023-12-02 18:21:49,004 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3366.6666666666665) internal successors, (10100), 2 states have internal predecessors, (10100), 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 18:21:49,004 INFO  L276                IsEmpty]: Start isEmpty. Operand 81043 states and 125966 transitions.
[2023-12-02 18:21:49,808 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10102
[2023-12-02 18:21:49,808 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 18:21:49,813 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:49,813 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-12-02 18:21:49,813 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 18:21:49,814 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 18:21:49,817 INFO  L85        PathProgramCache]: Analyzing trace with hash -1713953661, now seen corresponding path program 1 times
[2023-12-02 18:21:49,817 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 18:21:49,817 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496438433]
[2023-12-02 18:21:49,818 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 18:21:49,818 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 18:21:51,105 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 18:22:11,661 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2023-12-02 18:22:11,661 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 18:22:11,661 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496438433]
[2023-12-02 18:22:11,661 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496438433] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 18:22:11,661 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 18:22:11,663 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 18:22:11,663 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68425781]
[2023-12-02 18:22:11,663 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 18:22:11,672 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 18:22:11,672 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 18:22:11,682 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 18:22:11,682 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 18:22:11,685 INFO  L87              Difference]: Start difference. First operand 81043 states and 125966 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 18:22:49,028 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 18:22:49,028 INFO  L93              Difference]: Finished difference Result 243125 states and 377895 transitions.
[2023-12-02 18:22:49,028 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 18:22:49,030 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 10101
[2023-12-02 18:22:49,030 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 18:22:49,402 INFO  L225             Difference]: With dead ends: 243125
[2023-12-02 18:22:49,402 INFO  L226             Difference]: Without dead ends: 162083
[2023-12-02 18:22:49,454 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 18:22:49,455 INFO  L413           NwaCegarLoop]: 6551 mSDtfsCounter, 13000 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 27460 mSolverCounterSat, 13030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13000 SdHoareTripleChecker+Valid, 6599 SdHoareTripleChecker+Invalid, 40490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13030 IncrementalHoareTripleChecker+Valid, 27460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.2s IncrementalHoareTripleChecker+Time
[2023-12-02 18:22:49,456 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [13000 Valid, 6599 Invalid, 40490 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13030 Valid, 27460 Invalid, 0 Unknown, 0 Unchecked, 36.2s Time]
[2023-12-02 18:22:49,544 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 162083 states.
[2023-12-02 18:22:50,654 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 162083 to 162083.
[2023-12-02 18:22:50,755 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 162083 states, 162082 states have (on average 1.402080428425118) internal successors, (227252), 162082 states have internal predecessors, (227252), 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 18:22:50,920 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 162083 states to 162083 states and 227252 transitions.
[2023-12-02 18:22:50,920 INFO  L78                 Accepts]: Start accepts. Automaton has 162083 states and 227252 transitions. Word has length 10101
[2023-12-02 18:22:50,921 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 18:22:50,922 INFO  L495      AbstractCegarLoop]: Abstraction has 162083 states and 227252 transitions.
[2023-12-02 18:22:50,923 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 18:22:50,923 INFO  L276                IsEmpty]: Start isEmpty. Operand 162083 states and 227252 transitions.
[2023-12-02 18:22:51,968 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10105
[2023-12-02 18:22:51,968 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 18:22:51,973 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-12-02 18:22:51,973 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-12-02 18:22:51,973 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 18:22:51,974 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 18:22:51,978 INFO  L85        PathProgramCache]: Analyzing trace with hash -1566976725, now seen corresponding path program 1 times
[2023-12-02 18:22:51,978 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 18:22:51,978 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754123418]
[2023-12-02 18:22:51,980 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 18:22:51,980 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 18:22:53,359 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 18:23:11,292 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2023-12-02 18:23:11,293 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 18:23:11,293 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754123418]
[2023-12-02 18:23:11,293 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754123418] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 18:23:11,293 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 18:23:11,294 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 18:23:11,294 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696068877]
[2023-12-02 18:23:11,294 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 18:23:11,301 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 18:23:11,301 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 18:23:11,307 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 18:23:11,307 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 18:23:11,309 INFO  L87              Difference]: Start difference. First operand 162083 states and 227252 transitions. Second operand  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 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 18:23:48,811 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 18:23:48,812 INFO  L93              Difference]: Finished difference Result 486245 states and 681753 transitions.
[2023-12-02 18:23:48,812 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 18:23:48,814 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 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 10104
[2023-12-02 18:23:48,814 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 18:23:49,163 INFO  L225             Difference]: With dead ends: 486245
[2023-12-02 18:23:49,163 INFO  L226             Difference]: Without dead ends: 324163
[2023-12-02 18:23:49,232 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 18:23:49,233 INFO  L413           NwaCegarLoop]: 7227 mSDtfsCounter, 12196 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29365 mSolverCounterSat, 11755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12196 SdHoareTripleChecker+Valid, 7275 SdHoareTripleChecker+Invalid, 41120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11755 IncrementalHoareTripleChecker+Valid, 29365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.9s IncrementalHoareTripleChecker+Time
[2023-12-02 18:23:49,233 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12196 Valid, 7275 Invalid, 41120 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11755 Valid, 29365 Invalid, 0 Unknown, 0 Unchecked, 35.9s Time]
[2023-12-02 18:23:49,445 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 324163 states.
[2023-12-02 18:23:51,804 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 324163 to 324163.
[2023-12-02 18:23:52,302 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 324163 states, 324162 states have (on average 1.3053905146192335) internal successors, (423158), 324162 states have internal predecessors, (423158), 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 18:23:52,728 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 324163 states to 324163 states and 423158 transitions.
[2023-12-02 18:23:52,728 INFO  L78                 Accepts]: Start accepts. Automaton has 324163 states and 423158 transitions. Word has length 10104
[2023-12-02 18:23:52,730 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 18:23:52,730 INFO  L495      AbstractCegarLoop]: Abstraction has 324163 states and 423158 transitions.
[2023-12-02 18:23:52,732 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 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 18:23:52,732 INFO  L276                IsEmpty]: Start isEmpty. Operand 324163 states and 423158 transitions.
[2023-12-02 18:23:53,880 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10107
[2023-12-02 18:23:53,880 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 18:23:53,884 INFO  L195           NwaCegarLoop]: trace histogram [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, 1, 1, 1, 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 18:23:53,885 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-12-02 18:23:53,885 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 18:23:53,885 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 18:23:53,889 INFO  L85        PathProgramCache]: Analyzing trace with hash 113353668, now seen corresponding path program 1 times
[2023-12-02 18:23:53,889 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 18:23:53,889 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638156355]
[2023-12-02 18:23:53,890 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 18:23:53,891 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 18:23:55,352 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 18:24:21,686 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 18:24:21,687 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 18:24:21,687 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638156355]
[2023-12-02 18:24:21,687 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638156355] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 18:24:21,687 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 18:24:21,689 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 18:24:21,689 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669590455]
[2023-12-02 18:24:21,689 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 18:24:21,697 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 18:24:21,697 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 18:24:21,703 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 18:24:21,704 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 18:24:21,707 INFO  L87              Difference]: Start difference. First operand 324163 states and 423158 transitions. Second operand  has 3 states, 3 states have (on average 3368.6666666666665) internal successors, (10106), 2 states have internal predecessors, (10106), 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 18:24:57,996 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 18:24:57,996 INFO  L93              Difference]: Finished difference Result 810405 states and 1042539 transitions.
[2023-12-02 18:24:57,997 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 18:24:57,998 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3368.6666666666665) internal successors, (10106), 2 states have internal predecessors, (10106), 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 10106
[2023-12-02 18:24:57,999 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 18:24:58,582 INFO  L225             Difference]: With dead ends: 810405
[2023-12-02 18:24:58,582 INFO  L226             Difference]: Without dead ends: 486243
[2023-12-02 18:24:58,688 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 18:24:58,690 INFO  L413           NwaCegarLoop]: 8142 mSDtfsCounter, 11009 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 28442 mSolverCounterSat, 7491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11009 SdHoareTripleChecker+Valid, 8190 SdHoareTripleChecker+Invalid, 35933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7491 IncrementalHoareTripleChecker+Valid, 28442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.0s IncrementalHoareTripleChecker+Time
[2023-12-02 18:24:58,691 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11009 Valid, 8190 Invalid, 35933 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7491 Valid, 28442 Invalid, 0 Unknown, 0 Unchecked, 33.0s Time]
[2023-12-02 18:24:58,997 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 486243 states.
[2023-12-02 18:25:02,982 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 486243 to 486243.
[2023-12-02 18:25:03,220 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 486243 states, 486242 states have (on average 1.2374990231201748) internal successors, (601724), 486242 states have internal predecessors, (601724), 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 18:25:04,185 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 486243 states to 486243 states and 601724 transitions.
[2023-12-02 18:25:04,185 INFO  L78                 Accepts]: Start accepts. Automaton has 486243 states and 601724 transitions. Word has length 10106
[2023-12-02 18:25:04,186 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 18:25:04,186 INFO  L495      AbstractCegarLoop]: Abstraction has 486243 states and 601724 transitions.
[2023-12-02 18:25:04,188 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3368.6666666666665) internal successors, (10106), 2 states have internal predecessors, (10106), 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 18:25:04,188 INFO  L276                IsEmpty]: Start isEmpty. Operand 486243 states and 601724 transitions.
[2023-12-02 18:25:05,303 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10136
[2023-12-02 18:25:05,303 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 18:25:05,306 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:25:05,306 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2023-12-02 18:25:05,306 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 18:25:05,306 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 18:25:05,308 INFO  L85        PathProgramCache]: Analyzing trace with hash 213607913, now seen corresponding path program 1 times
[2023-12-02 18:25:05,308 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 18:25:05,308 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173878989]
[2023-12-02 18:25:05,309 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 18:25:05,309 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 18:25:06,573 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 18:25:24,278 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 18:25:24,278 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 18:25:24,278 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173878989]
[2023-12-02 18:25:24,278 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173878989] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 18:25:24,279 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 18:25:24,280 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 18:25:24,280 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493205164]
[2023-12-02 18:25:24,280 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 18:25:24,284 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 18:25:24,284 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 18:25:24,289 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 18:25:24,289 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 18:25:24,291 INFO  L87              Difference]: Start difference. First operand 486243 states and 601724 transitions. Second operand  has 3 states, 3 states have (on average 3378.3333333333335) internal successors, (10135), 2 states have internal predecessors, (10135), 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 18:26:06,821 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 18:26:06,821 INFO  L93              Difference]: Finished difference Result 1458725 states and 1805169 transitions.
[2023-12-02 18:26:06,821 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 18:26:06,823 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3378.3333333333335) internal successors, (10135), 2 states have internal predecessors, (10135), 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 10135
[2023-12-02 18:26:06,823 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 18:26:08,067 INFO  L225             Difference]: With dead ends: 1458725
[2023-12-02 18:26:08,067 INFO  L226             Difference]: Without dead ends: 972483
[2023-12-02 18:26:08,556 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 18:26:08,557 INFO  L413           NwaCegarLoop]: 8085 mSDtfsCounter, 11263 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 30689 mSolverCounterSat, 11046 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11263 SdHoareTripleChecker+Valid, 8133 SdHoareTripleChecker+Invalid, 41735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11046 IncrementalHoareTripleChecker+Valid, 30689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.7s IncrementalHoareTripleChecker+Time
[2023-12-02 18:26:08,558 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11263 Valid, 8133 Invalid, 41735 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11046 Valid, 30689 Invalid, 0 Unknown, 0 Unchecked, 37.7s Time]
[2023-12-02 18:26:09,304 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 972483 states.
[2023-12-02 18:26:17,804 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 972483 to 972483.
[2023-12-02 18:26:18,271 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 972483 states, 972482 states have (on average 1.18212573600334) internal successors, (1149596), 972482 states have internal predecessors, (1149596), 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 18:26:20,044 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 972483 states to 972483 states and 1149596 transitions.
[2023-12-02 18:26:20,045 INFO  L78                 Accepts]: Start accepts. Automaton has 972483 states and 1149596 transitions. Word has length 10135
[2023-12-02 18:26:20,045 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 18:26:20,045 INFO  L495      AbstractCegarLoop]: Abstraction has 972483 states and 1149596 transitions.
[2023-12-02 18:26:20,047 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3378.3333333333335) internal successors, (10135), 2 states have internal predecessors, (10135), 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 18:26:20,047 INFO  L276                IsEmpty]: Start isEmpty. Operand 972483 states and 1149596 transitions.
[2023-12-02 18:26:22,418 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10226
[2023-12-02 18:26:22,418 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 18:26:22,420 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:22,420 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2023-12-02 18:26:22,421 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 18:26:22,421 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 18:26:22,423 INFO  L85        PathProgramCache]: Analyzing trace with hash -1901684824, now seen corresponding path program 1 times
[2023-12-02 18:26:22,423 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 18:26:22,423 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8892834]
[2023-12-02 18:26:22,424 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 18:26:22,424 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 18:26:23,848 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat