./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem07_label26.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_decd9aaf-d643-427d-8a94-9ea9da3bb18b/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decd9aaf-d643-427d-8a94-9ea9da3bb18b/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_decd9aaf-d643-427d-8a94-9ea9da3bb18b/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decd9aaf-d643-427d-8a94-9ea9da3bb18b/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem07_label26.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decd9aaf-d643-427d-8a94-9ea9da3bb18b/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_decd9aaf-d643-427d-8a94-9ea9da3bb18b/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 99ca606f39e8e89c81ae97710d3cffb62ce706661ab0895e651aaa8a954b23f1
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-12-02 17:34:29,551 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-12-02 17:34:29,621 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decd9aaf-d643-427d-8a94-9ea9da3bb18b/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf
[2023-12-02 17:34:29,626 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-12-02 17:34:29,626 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-12-02 17:34:29,652 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-12-02 17:34:29,653 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-12-02 17:34:29,653 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-12-02 17:34:29,654 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-12-02 17:34:29,655 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-12-02 17:34:29,655 INFO  L153        SettingsManager]:  * User list type=DISABLED
[2023-12-02 17:34:29,656 INFO  L151        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-12-02 17:34:29,656 INFO  L153        SettingsManager]:  * Explicit value domain=true
[2023-12-02 17:34:29,657 INFO  L153        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-12-02 17:34:29,658 INFO  L153        SettingsManager]:  * Octagon Domain=false
[2023-12-02 17:34:29,658 INFO  L153        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-12-02 17:34:29,659 INFO  L153        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-12-02 17:34:29,659 INFO  L153        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-12-02 17:34:29,660 INFO  L153        SettingsManager]:  * Interval Domain=false
[2023-12-02 17:34:29,660 INFO  L151        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-12-02 17:34:29,661 INFO  L153        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-12-02 17:34:29,662 INFO  L153        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-12-02 17:34:29,663 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-12-02 17:34:29,663 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-12-02 17:34:29,664 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-12-02 17:34:29,665 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-12-02 17:34:29,665 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-12-02 17:34:29,666 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-12-02 17:34:29,666 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-12-02 17:34:29,667 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-12-02 17:34:29,667 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-12-02 17:34:29,668 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-12-02 17:34:29,668 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-12-02 17:34:29,668 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-12-02 17:34:29,669 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-12-02 17:34:29,669 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-12-02 17:34:29,669 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-12-02 17:34:29,669 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-12-02 17:34:29,670 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-12-02 17:34:29,670 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-12-02 17:34:29,670 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-12-02 17:34:29,670 INFO  L153        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-12-02 17:34:29,671 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-12-02 17:34:29,671 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-12-02 17:34:29,671 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-12-02 17:34:29,671 INFO  L153        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-12-02 17:34:29,671 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-12-02 17:34:29,672 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_decd9aaf-d643-427d-8a94-9ea9da3bb18b/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_decd9aaf-d643-427d-8a94-9ea9da3bb18b/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 -> 99ca606f39e8e89c81ae97710d3cffb62ce706661ab0895e651aaa8a954b23f1
[2023-12-02 17:34:29,874 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-12-02 17:34:29,894 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-12-02 17:34:29,897 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-12-02 17:34:29,898 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-12-02 17:34:29,899 INFO  L274        PluginConnector]: CDTParser initialized
[2023-12-02 17:34:29,900 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decd9aaf-d643-427d-8a94-9ea9da3bb18b/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/eca-rers2012/Problem07_label26.c
[2023-12-02 17:34:32,666 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-12-02 17:34:34,188 INFO  L384              CDTParser]: Found 1 translation units.
[2023-12-02 17:34:34,189 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decd9aaf-d643-427d-8a94-9ea9da3bb18b/sv-benchmarks/c/eca-rers2012/Problem07_label26.c
[2023-12-02 17:34:34,384 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decd9aaf-d643-427d-8a94-9ea9da3bb18b/bin/utaipan-verify-nQ1chXbOIh/data/28a6d7056/00cd3783959b4660a1207134c80ca6b8/FLAGb98a25390
[2023-12-02 17:34:34,396 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decd9aaf-d643-427d-8a94-9ea9da3bb18b/bin/utaipan-verify-nQ1chXbOIh/data/28a6d7056/00cd3783959b4660a1207134c80ca6b8
[2023-12-02 17:34:34,399 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-12-02 17:34:34,401 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-12-02 17:34:34,402 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-12-02 17:34:34,402 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-12-02 17:34:34,407 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-12-02 17:34:34,408 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:34:34" (1/1) ...
[2023-12-02 17:34:34,421 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a84ca92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:34:34, skipping insertion in model container
[2023-12-02 17:34:34,421 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:34:34" (1/1) ...
[2023-12-02 17:34:35,338 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-12-02 17:34:46,314 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_decd9aaf-d643-427d-8a94-9ea9da3bb18b/sv-benchmarks/c/eca-rers2012/Problem07_label26.c[2775806,2775819]
[2023-12-02 17:34:46,376 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-12-02 17:34:46,385 INFO  L202         MainTranslator]: Completed pre-run
[2023-12-02 17:34:52,902 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_decd9aaf-d643-427d-8a94-9ea9da3bb18b/sv-benchmarks/c/eca-rers2012/Problem07_label26.c[2775806,2775819]
[2023-12-02 17:34:52,906 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-12-02 17:34:53,719 INFO  L206         MainTranslator]: Completed translation
[2023-12-02 17:34:53,720 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:34:53 WrapperNode
[2023-12-02 17:34:53,720 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-12-02 17:34:53,721 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-12-02 17:34:53,721 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-12-02 17:34:53,721 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-12-02 17:34:53,727 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:34:53" (1/1) ...
[2023-12-02 17:34:54,186 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:34:53" (1/1) ...
[2023-12-02 17:34:56,118 INFO  L138                Inliner]: procedures = 59, calls = 53, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 83774
[2023-12-02 17:34:56,118 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-12-02 17:34:56,119 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-12-02 17:34:56,119 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-12-02 17:34:56,119 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-12-02 17:34:56,128 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:34:53" (1/1) ...
[2023-12-02 17:34:56,128 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:34:53" (1/1) ...
[2023-12-02 17:34:56,426 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:34:53" (1/1) ...
[2023-12-02 17:34:56,427 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:34:53" (1/1) ...
[2023-12-02 17:34:57,165 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:34:53" (1/1) ...
[2023-12-02 17:34:57,321 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:34:53" (1/1) ...
[2023-12-02 17:34:57,590 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:34:53" (1/1) ...
[2023-12-02 17:34:57,680 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:34:53" (1/1) ...
[2023-12-02 17:34:58,020 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-12-02 17:34:58,022 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-12-02 17:34:58,022 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-12-02 17:34:58,022 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-12-02 17:34:58,023 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:34:53" (1/1) ...
[2023-12-02 17:34:58,031 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-12-02 17:34:58,042 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decd9aaf-d643-427d-8a94-9ea9da3bb18b/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 17:34:58,055 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decd9aaf-d643-427d-8a94-9ea9da3bb18b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-12-02 17:34:58,065 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decd9aaf-d643-427d-8a94-9ea9da3bb18b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-12-02 17:34:58,098 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-12-02 17:34:58,099 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-12-02 17:34:58,099 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-12-02 17:34:58,099 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-12-02 17:34:58,254 INFO  L241             CfgBuilder]: Building ICFG
[2023-12-02 17:34:58,256 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-12-02 17:35:37,568 INFO  L282             CfgBuilder]: Performing block encoding
[2023-12-02 17:35:38,684 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-12-02 17:35:38,685 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-12-02 17:35:38,691 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:35:38 BoogieIcfgContainer
[2023-12-02 17:35:38,691 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-12-02 17:35:38,694 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-12-02 17:35:38,695 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-12-02 17:35:38,698 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-12-02 17:35:38,698 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:34:34" (1/3) ...
[2023-12-02 17:35:38,699 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d64ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:35:38, skipping insertion in model container
[2023-12-02 17:35:38,699 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:34:53" (2/3) ...
[2023-12-02 17:35:38,700 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d64ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:35:38, skipping insertion in model container
[2023-12-02 17:35:38,700 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:35:38" (3/3) ...
[2023-12-02 17:35:38,701 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem07_label26.c
[2023-12-02 17:35:38,720 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-12-02 17:35:38,720 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-12-02 17:35:38,922 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-12-02 17:35:38,929 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;@3a7c70ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-12-02 17:35:38,929 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-12-02 17:35:38,967 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 17:35:39,646 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10086
[2023-12-02 17:35:39,646 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 17:35:39,654 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 17:35:39,657 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 17:35:39,662 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 17:35:39,667 INFO  L85        PathProgramCache]: Analyzing trace with hash 36540500, now seen corresponding path program 1 times
[2023-12-02 17:35:39,675 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 17:35:39,675 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66395286]
[2023-12-02 17:35:39,679 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 17:35:39,679 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 17:35:42,673 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 17:36:41,609 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 17:36:41,610 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 17:36:41,610 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66395286]
[2023-12-02 17:36:41,610 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66395286] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 17:36:41,611 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 17:36:41,613 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-12-02 17:36:41,614 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960157254]
[2023-12-02 17:36:41,614 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 17:36:41,628 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-12-02 17:36:41,629 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 17:36:41,663 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-12-02 17:36:41,664 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-12-02 17:36:41,693 INFO  L87              Difference]: Start difference. First operand  has 10135 states, 10133 states have (on average 1.9951643146156124) internal successors, (20217), 10134 states have internal predecessors, (20217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 2521.25) internal successors, (10085), 3 states have internal predecessors, (10085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 17:37:44,005 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 17:37:44,005 INFO  L93              Difference]: Finished difference Result 40533 states and 80861 transitions.
[2023-12-02 17:37:44,006 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-12-02 17:37:44,010 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2521.25) internal successors, (10085), 3 states have internal predecessors, (10085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10085
[2023-12-02 17:37:44,032 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 17:37:44,260 INFO  L225             Difference]: With dead ends: 40533
[2023-12-02 17:37:44,260 INFO  L226             Difference]: Without dead ends: 30393
[2023-12-02 17:37:44,278 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-12-02 17:37:44,282 INFO  L413           NwaCegarLoop]: 5085 mSDtfsCounter, 22155 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 51680 mSolverCounterSat, 18959 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22155 SdHoareTripleChecker+Valid, 5196 SdHoareTripleChecker+Invalid, 70639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 18959 IncrementalHoareTripleChecker+Valid, 51680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.0s IncrementalHoareTripleChecker+Time
[2023-12-02 17:37:44,283 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22155 Valid, 5196 Invalid, 70639 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [18959 Valid, 51680 Invalid, 0 Unknown, 0 Unchecked, 61.0s Time]
[2023-12-02 17:37:44,342 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30393 states.
[2023-12-02 17:37:44,926 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30393 to 30393.
[2023-12-02 17:37:44,973 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30393 states, 30392 states have (on average 1.4995064490655436) internal successors, (45573), 30392 states have internal predecessors, (45573), 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 17:37:45,053 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30393 states to 30393 states and 45573 transitions.
[2023-12-02 17:37:45,054 INFO  L78                 Accepts]: Start accepts. Automaton has 30393 states and 45573 transitions. Word has length 10085
[2023-12-02 17:37:45,071 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 17:37:45,072 INFO  L495      AbstractCegarLoop]: Abstraction has 30393 states and 45573 transitions.
[2023-12-02 17:37:45,075 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2521.25) internal successors, (10085), 3 states have internal predecessors, (10085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 17:37:45,076 INFO  L276                IsEmpty]: Start isEmpty. Operand 30393 states and 45573 transitions.
[2023-12-02 17:37:45,851 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12985
[2023-12-02 17:37:45,851 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 17:37:45,859 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-02 17:37:45,860 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-12-02 17:37:45,860 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 17:37:45,860 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 17:37:45,864 INFO  L85        PathProgramCache]: Analyzing trace with hash 143667293, now seen corresponding path program 1 times
[2023-12-02 17:37:45,864 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 17:37:45,864 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229626170]
[2023-12-02 17:37:45,865 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 17:37:45,865 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 17:37:47,930 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 17:38:27,319 INFO  L134       CoverageAnalysis]: Checked inductivity of 2888 backedges. 2885 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2023-12-02 17:38:27,319 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 17:38:27,320 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229626170]
[2023-12-02 17:38:27,320 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229626170] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 17:38:27,320 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 17:38:27,322 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 17:38:27,322 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019568634]
[2023-12-02 17:38:27,322 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 17:38:27,339 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 17:38:27,339 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 17:38:27,348 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 17:38:27,348 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 17:38:27,352 INFO  L87              Difference]: Start difference. First operand 30393 states and 45573 transitions. Second operand  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 17:39:03,859 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 17:39:03,860 INFO  L93              Difference]: Finished difference Result 70915 states and 116444 transitions.
[2023-12-02 17:39:03,860 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 17:39:03,863 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12984
[2023-12-02 17:39:03,866 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 17:39:03,931 INFO  L225             Difference]: With dead ends: 70915
[2023-12-02 17:39:03,931 INFO  L226             Difference]: Without dead ends: 50653
[2023-12-02 17:39:03,947 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 17:39:03,949 INFO  L413           NwaCegarLoop]: 4814 mSDtfsCounter, 10912 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 28583 mSolverCounterSat, 11758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10912 SdHoareTripleChecker+Valid, 4862 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 17:39:03,950 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10912 Valid, 4862 Invalid, 40341 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11758 Valid, 28583 Invalid, 0 Unknown, 0 Unchecked, 35.8s Time]
[2023-12-02 17:39:04,000 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50653 states.
[2023-12-02 17:39:04,645 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50653 to 50653.
[2023-12-02 17:39:04,692 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50653 states, 50652 states have (on average 1.4573955618731738) internal successors, (73820), 50652 states have internal predecessors, (73820), 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 17:39:04,781 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50653 states to 50653 states and 73820 transitions.
[2023-12-02 17:39:04,781 INFO  L78                 Accepts]: Start accepts. Automaton has 50653 states and 73820 transitions. Word has length 12984
[2023-12-02 17:39:04,785 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 17:39:04,785 INFO  L495      AbstractCegarLoop]: Abstraction has 50653 states and 73820 transitions.
[2023-12-02 17:39:04,787 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 17:39:04,788 INFO  L276                IsEmpty]: Start isEmpty. Operand 50653 states and 73820 transitions.
[2023-12-02 17:39:05,747 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12986
[2023-12-02 17:39:05,747 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 17:39:05,753 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-02 17:39:05,753 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-12-02 17:39:05,754 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 17:39:05,754 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 17:39:05,757 INFO  L85        PathProgramCache]: Analyzing trace with hash 1548787755, now seen corresponding path program 1 times
[2023-12-02 17:39:05,757 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 17:39:05,758 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168048016]
[2023-12-02 17:39:05,759 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 17:39:05,759 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 17:39:07,707 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 17:40:15,810 INFO  L134       CoverageAnalysis]: Checked inductivity of 2890 backedges. 2890 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 17:40:15,810 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 17:40:15,810 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168048016]
[2023-12-02 17:40:15,810 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168048016] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 17:40:15,811 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 17:40:15,813 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-12-02 17:40:15,813 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434080460]
[2023-12-02 17:40:15,813 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 17:40:15,822 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 17:40:15,822 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 17:40:15,831 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 17:40:15,831 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 17:40:15,834 INFO  L87              Difference]: Start difference. First operand 50653 states and 73820 transitions. Second operand  has 3 states, 3 states have (on average 4328.333333333333) internal successors, (12985), 3 states have internal predecessors, (12985), 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 17:40:50,154 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 17:40:50,155 INFO  L93              Difference]: Finished difference Result 111435 states and 165527 transitions.
[2023-12-02 17:40:50,155 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 17:40:50,157 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4328.333333333333) internal successors, (12985), 3 states have internal predecessors, (12985), 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 12985
[2023-12-02 17:40:50,159 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 17:40:50,335 INFO  L225             Difference]: With dead ends: 111435
[2023-12-02 17:40:50,335 INFO  L226             Difference]: Without dead ends: 70913
[2023-12-02 17:40:50,364 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 17:40:50,366 INFO  L413           NwaCegarLoop]: 18144 mSDtfsCounter, 10150 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 33483 mSolverCounterSat, 3753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10150 SdHoareTripleChecker+Valid, 18193 SdHoareTripleChecker+Invalid, 37236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3753 IncrementalHoareTripleChecker+Valid, 33483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.6s IncrementalHoareTripleChecker+Time
[2023-12-02 17:40:50,366 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10150 Valid, 18193 Invalid, 37236 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3753 Valid, 33483 Invalid, 0 Unknown, 0 Unchecked, 33.6s Time]
[2023-12-02 17:40:50,410 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 70913 states.
[2023-12-02 17:40:50,932 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 70913 to 70913.
[2023-12-02 17:40:50,984 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 70913 states, 70912 states have (on average 1.412595893501805) internal successors, (100170), 70912 states have internal predecessors, (100170), 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 17:40:51,068 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70913 states to 70913 states and 100170 transitions.
[2023-12-02 17:40:51,068 INFO  L78                 Accepts]: Start accepts. Automaton has 70913 states and 100170 transitions. Word has length 12985
[2023-12-02 17:40:51,071 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 17:40:51,072 INFO  L495      AbstractCegarLoop]: Abstraction has 70913 states and 100170 transitions.
[2023-12-02 17:40:51,074 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4328.333333333333) internal successors, (12985), 3 states have internal predecessors, (12985), 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 17:40:51,074 INFO  L276                IsEmpty]: Start isEmpty. Operand 70913 states and 100170 transitions.
[2023-12-02 17:40:52,099 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12992
[2023-12-02 17:40:52,099 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 17:40:52,106 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-12-02 17:40:52,106 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-12-02 17:40:52,106 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 17:40:52,107 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 17:40:52,111 INFO  L85        PathProgramCache]: Analyzing trace with hash 2050414172, now seen corresponding path program 1 times
[2023-12-02 17:40:52,112 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 17:40:52,112 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524153194]
[2023-12-02 17:40:52,113 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 17:40:52,113 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 17:40:54,176 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 17:41:36,924 INFO  L134       CoverageAnalysis]: Checked inductivity of 2902 backedges. 2892 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2023-12-02 17:41:36,924 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 17:41:36,924 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524153194]
[2023-12-02 17:41:36,924 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524153194] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 17:41:36,924 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 17:41:36,928 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 17:41:36,928 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385105407]
[2023-12-02 17:41:36,928 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 17:41:36,942 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 17:41:36,942 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 17:41:36,955 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 17:41:36,955 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 17:41:36,958 INFO  L87              Difference]: Start difference. First operand 70913 states and 100170 transitions. Second operand  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 17:42:17,166 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 17:42:17,166 INFO  L93              Difference]: Finished difference Result 192475 states and 280235 transitions.
[2023-12-02 17:42:17,166 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 17:42:17,169 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12991
[2023-12-02 17:42:17,172 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 17:42:17,296 INFO  L225             Difference]: With dead ends: 192475
[2023-12-02 17:42:17,296 INFO  L226             Difference]: Without dead ends: 131693
[2023-12-02 17:42:17,316 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 17:42:17,317 INFO  L413           NwaCegarLoop]: 6715 mSDtfsCounter, 10069 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 27589 mSolverCounterSat, 13030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10069 SdHoareTripleChecker+Valid, 6763 SdHoareTripleChecker+Invalid, 40619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13030 IncrementalHoareTripleChecker+Valid, 27589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.1s IncrementalHoareTripleChecker+Time
[2023-12-02 17:42:17,318 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10069 Valid, 6763 Invalid, 40619 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13030 Valid, 27589 Invalid, 0 Unknown, 0 Unchecked, 39.1s Time]
[2023-12-02 17:42:17,396 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 131693 states.
[2023-12-02 17:42:18,503 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 131693 to 131693.
[2023-12-02 17:42:18,580 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 131693 states, 131692 states have (on average 1.3217355648027216) internal successors, (174062), 131692 states have internal predecessors, (174062), 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 17:42:18,731 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 131693 states to 131693 states and 174062 transitions.
[2023-12-02 17:42:18,731 INFO  L78                 Accepts]: Start accepts. Automaton has 131693 states and 174062 transitions. Word has length 12991
[2023-12-02 17:42:18,734 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 17:42:18,735 INFO  L495      AbstractCegarLoop]: Abstraction has 131693 states and 174062 transitions.
[2023-12-02 17:42:18,737 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 17:42:18,737 INFO  L276                IsEmpty]: Start isEmpty. Operand 131693 states and 174062 transitions.
[2023-12-02 17:42:19,882 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13002
[2023-12-02 17:42:19,882 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 17:42:19,889 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-02 17:42:19,889 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-12-02 17:42:19,889 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 17:42:19,889 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 17:42:19,893 INFO  L85        PathProgramCache]: Analyzing trace with hash -597109245, now seen corresponding path program 1 times
[2023-12-02 17:42:19,893 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 17:42:19,893 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304809219]
[2023-12-02 17:42:19,894 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 17:42:19,894 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 17:42:21,869 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 17:43:27,239 INFO  L134       CoverageAnalysis]: Checked inductivity of 2922 backedges. 2922 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 17:43:27,240 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 17:43:27,240 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304809219]
[2023-12-02 17:43:27,240 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304809219] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 17:43:27,240 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 17:43:27,242 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-12-02 17:43:27,242 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116599019]
[2023-12-02 17:43:27,242 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 17:43:27,253 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-12-02 17:43:27,253 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 17:43:27,263 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-12-02 17:43:27,263 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-12-02 17:43:27,266 INFO  L87              Difference]: Start difference. First operand 131693 states and 174062 transitions. Second operand  has 4 states, 4 states have (on average 3250.25) internal successors, (13001), 3 states have internal predecessors, (13001), 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 17:44:24,759 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 17:44:24,759 INFO  L93              Difference]: Finished difference Result 455855 states and 613939 transitions.
[2023-12-02 17:44:24,759 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-12-02 17:44:24,761 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3250.25) internal successors, (13001), 3 states have internal predecessors, (13001), 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 13001
[2023-12-02 17:44:24,763 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 17:44:25,151 INFO  L225             Difference]: With dead ends: 455855
[2023-12-02 17:44:25,151 INFO  L226             Difference]: Without dead ends: 334293
[2023-12-02 17:44:25,200 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-12-02 17:44:25,201 INFO  L413           NwaCegarLoop]: 5412 mSDtfsCounter, 28962 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40823 mSolverCounterSat, 25779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28962 SdHoareTripleChecker+Valid, 5508 SdHoareTripleChecker+Invalid, 66602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 25779 IncrementalHoareTripleChecker+Valid, 40823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.1s IncrementalHoareTripleChecker+Time
[2023-12-02 17:44:25,201 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [28962 Valid, 5508 Invalid, 66602 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [25779 Valid, 40823 Invalid, 0 Unknown, 0 Unchecked, 55.1s Time]
[2023-12-02 17:44:25,396 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 334293 states.
[2023-12-02 17:44:28,175 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 334293 to 334293.
[2023-12-02 17:44:28,338 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 334293 states, 334292 states have (on average 1.2274777739221998) internal successors, (410336), 334292 states have internal predecessors, (410336), 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 17:44:28,746 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 334293 states to 334293 states and 410336 transitions.
[2023-12-02 17:44:28,746 INFO  L78                 Accepts]: Start accepts. Automaton has 334293 states and 410336 transitions. Word has length 13001
[2023-12-02 17:44:28,748 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 17:44:28,748 INFO  L495      AbstractCegarLoop]: Abstraction has 334293 states and 410336 transitions.
[2023-12-02 17:44:28,750 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3250.25) internal successors, (13001), 3 states have internal predecessors, (13001), 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 17:44:28,750 INFO  L276                IsEmpty]: Start isEmpty. Operand 334293 states and 410336 transitions.
[2023-12-02 17:44:30,156 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13085
[2023-12-02 17:44:30,156 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 17:44:30,160 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-12-02 17:44:30,160 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-12-02 17:44:30,160 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 17:44:30,161 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 17:44:30,163 INFO  L85        PathProgramCache]: Analyzing trace with hash -1942277867, now seen corresponding path program 1 times
[2023-12-02 17:44:30,163 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 17:44:30,163 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816365371]
[2023-12-02 17:44:30,164 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 17:44:30,164 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 17:44:32,094 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 17:45:30,317 INFO  L134       CoverageAnalysis]: Checked inductivity of 3091 backedges. 3087 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-12-02 17:45:30,317 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 17:45:30,317 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816365371]
[2023-12-02 17:45:30,317 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816365371] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 17:45:30,318 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 17:45:30,320 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-12-02 17:45:30,320 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016579423]
[2023-12-02 17:45:30,320 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 17:45:30,326 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-12-02 17:45:30,326 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 17:45:30,334 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-12-02 17:45:30,334 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-12-02 17:45:30,337 INFO  L87              Difference]: Start difference. First operand 334293 states and 410336 transitions. Second operand  has 4 states, 4 states have (on average 3270.25) internal successors, (13081), 3 states have internal predecessors, (13081), 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)