./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem07_label25.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_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/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_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem07_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/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_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/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 9c325216d27435ab9d61142a55a6376950293cfa4a3a29ba130107c87c7efd14
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-12-02 19:23:00,586 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-12-02 19:23:00,667 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf
[2023-12-02 19:23:00,671 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-12-02 19:23:00,672 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-12-02 19:23:00,697 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-12-02 19:23:00,698 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-12-02 19:23:00,698 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-12-02 19:23:00,699 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-12-02 19:23:00,700 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-12-02 19:23:00,700 INFO  L153        SettingsManager]:  * User list type=DISABLED
[2023-12-02 19:23:00,701 INFO  L151        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-12-02 19:23:00,701 INFO  L153        SettingsManager]:  * Explicit value domain=true
[2023-12-02 19:23:00,702 INFO  L153        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-12-02 19:23:00,702 INFO  L153        SettingsManager]:  * Octagon Domain=false
[2023-12-02 19:23:00,703 INFO  L153        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-12-02 19:23:00,703 INFO  L153        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-12-02 19:23:00,704 INFO  L153        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-12-02 19:23:00,704 INFO  L153        SettingsManager]:  * Interval Domain=false
[2023-12-02 19:23:00,705 INFO  L151        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-12-02 19:23:00,705 INFO  L153        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-12-02 19:23:00,706 INFO  L153        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-12-02 19:23:00,707 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-12-02 19:23:00,707 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-12-02 19:23:00,708 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-12-02 19:23:00,708 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-12-02 19:23:00,708 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-12-02 19:23:00,709 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-12-02 19:23:00,709 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-12-02 19:23:00,710 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-12-02 19:23:00,710 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-12-02 19:23:00,710 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-12-02 19:23:00,711 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-12-02 19:23:00,711 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-12-02 19:23:00,711 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-12-02 19:23:00,711 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-12-02 19:23:00,712 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-12-02 19:23:00,712 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-12-02 19:23:00,712 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-12-02 19:23:00,712 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-12-02 19:23:00,713 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-12-02 19:23:00,713 INFO  L153        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-12-02 19:23:00,713 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-12-02 19:23:00,713 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-12-02 19:23:00,713 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-12-02 19:23:00,714 INFO  L153        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-12-02 19:23:00,714 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-12-02 19:23:00,714 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_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/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_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/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 -> 9c325216d27435ab9d61142a55a6376950293cfa4a3a29ba130107c87c7efd14
[2023-12-02 19:23:00,970 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-12-02 19:23:00,990 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-12-02 19:23:00,993 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-12-02 19:23:00,994 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-12-02 19:23:00,995 INFO  L274        PluginConnector]: CDTParser initialized
[2023-12-02 19:23:00,996 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/eca-rers2012/Problem07_label25.c
[2023-12-02 19:23:03,737 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-12-02 19:23:05,223 INFO  L384              CDTParser]: Found 1 translation units.
[2023-12-02 19:23:05,223 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/sv-benchmarks/c/eca-rers2012/Problem07_label25.c
[2023-12-02 19:23:05,360 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/bin/utaipan-verify-nQ1chXbOIh/data/f9353d971/36d1e2b47667454c8a95ded7f29a02b4/FLAG38de2df25
[2023-12-02 19:23:05,372 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/bin/utaipan-verify-nQ1chXbOIh/data/f9353d971/36d1e2b47667454c8a95ded7f29a02b4
[2023-12-02 19:23:05,373 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-12-02 19:23:05,375 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-12-02 19:23:05,376 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-12-02 19:23:05,376 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-12-02 19:23:05,381 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-12-02 19:23:05,381 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:23:05" (1/1) ...
[2023-12-02 19:23:05,383 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ca9b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:23:05, skipping insertion in model container
[2023-12-02 19:23:05,383 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:23:05" (1/1) ...
[2023-12-02 19:23:06,158 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-12-02 19:23:16,964 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_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/sv-benchmarks/c/eca-rers2012/Problem07_label25.c[2775977,2775990]
[2023-12-02 19:23:17,028 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-12-02 19:23:17,035 INFO  L202         MainTranslator]: Completed pre-run
[2023-12-02 19:23:23,673 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_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/sv-benchmarks/c/eca-rers2012/Problem07_label25.c[2775977,2775990]
[2023-12-02 19:23:23,677 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-12-02 19:23:24,441 INFO  L206         MainTranslator]: Completed translation
[2023-12-02 19:23:24,441 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:23:24 WrapperNode
[2023-12-02 19:23:24,442 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-12-02 19:23:24,442 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-12-02 19:23:24,443 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-12-02 19:23:24,443 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-12-02 19:23:24,448 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:23:24" (1/1) ...
[2023-12-02 19:23:24,813 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:23:24" (1/1) ...
[2023-12-02 19:23:27,004 INFO  L138                Inliner]: procedures = 59, calls = 53, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 83774
[2023-12-02 19:23:27,004 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-12-02 19:23:27,005 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-12-02 19:23:27,005 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-12-02 19:23:27,005 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-12-02 19:23:27,013 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:23:24" (1/1) ...
[2023-12-02 19:23:27,014 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:23:24" (1/1) ...
[2023-12-02 19:23:27,480 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:23:24" (1/1) ...
[2023-12-02 19:23:27,481 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:23:24" (1/1) ...
[2023-12-02 19:23:28,340 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:23:24" (1/1) ...
[2023-12-02 19:23:28,608 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:23:24" (1/1) ...
[2023-12-02 19:23:28,789 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:23:24" (1/1) ...
[2023-12-02 19:23:28,889 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:23:24" (1/1) ...
[2023-12-02 19:23:29,192 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-12-02 19:23:29,193 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-12-02 19:23:29,193 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-12-02 19:23:29,194 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-12-02 19:23:29,194 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:23:24" (1/1) ...
[2023-12-02 19:23:29,201 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-12-02 19:23:29,211 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 19:23:29,223 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-12-02 19:23:29,225 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d0e7c6e-a956-4295-9b9a-f4d680ada20a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-12-02 19:23:29,250 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-12-02 19:23:29,250 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-12-02 19:23:29,250 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-12-02 19:23:29,250 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-12-02 19:23:29,377 INFO  L241             CfgBuilder]: Building ICFG
[2023-12-02 19:23:29,379 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-12-02 19:24:08,037 INFO  L282             CfgBuilder]: Performing block encoding
[2023-12-02 19:24:09,203 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-12-02 19:24:09,204 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-12-02 19:24:09,210 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:24:09 BoogieIcfgContainer
[2023-12-02 19:24:09,210 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-12-02 19:24:09,213 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-12-02 19:24:09,213 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-12-02 19:24:09,216 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-12-02 19:24:09,216 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:23:05" (1/3) ...
[2023-12-02 19:24:09,217 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8c1757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:24:09, skipping insertion in model container
[2023-12-02 19:24:09,217 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:23:24" (2/3) ...
[2023-12-02 19:24:09,217 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8c1757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:24:09, skipping insertion in model container
[2023-12-02 19:24:09,218 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:24:09" (3/3) ...
[2023-12-02 19:24:09,219 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem07_label25.c
[2023-12-02 19:24:09,237 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-12-02 19:24:09,237 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-12-02 19:24:09,417 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-12-02 19:24:09,424 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;@6c359328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-12-02 19:24:09,424 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-12-02 19:24:09,460 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 19:24:10,101 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10086
[2023-12-02 19:24:10,101 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 19:24:10,107 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 19:24:10,109 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 19:24:10,113 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 19:24:10,119 INFO  L85        PathProgramCache]: Analyzing trace with hash 36540756, now seen corresponding path program 1 times
[2023-12-02 19:24:10,126 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 19:24:10,126 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562924700]
[2023-12-02 19:24:10,129 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 19:24:10,129 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 19:24:13,036 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 19:24:48,188 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 19:24:48,189 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 19:24:48,190 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562924700]
[2023-12-02 19:24:48,190 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562924700] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 19:24:48,191 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 19:24:48,193 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 19:24:48,195 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856474414]
[2023-12-02 19:24:48,196 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 19:24:48,217 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 19:24:48,218 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 19:24:48,275 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 19:24:48,276 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 19:24:48,320 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 19:25:24,862 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 19:25:24,862 INFO  L93              Difference]: Finished difference Result 30401 states and 60647 transitions.
[2023-12-02 19:25:24,864 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 19:25:24,870 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 19:25:24,886 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 19:25:24,988 INFO  L225             Difference]: With dead ends: 30401
[2023-12-02 19:25:24,988 INFO  L226             Difference]: Without dead ends: 20263
[2023-12-02 19:25:25,003 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 19:25:25,006 INFO  L413           NwaCegarLoop]: 7699 mSDtfsCounter, 350 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 30990 mSolverCounterSat, 9502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 7749 SdHoareTripleChecker+Invalid, 40492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9502 IncrementalHoareTripleChecker+Valid, 30990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.8s IncrementalHoareTripleChecker+Time
[2023-12-02 19:25:25,007 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 7749 Invalid, 40492 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9502 Valid, 30990 Invalid, 0 Unknown, 0 Unchecked, 35.8s Time]
[2023-12-02 19:25:25,045 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20263 states.
[2023-12-02 19:25:25,370 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20263 to 20263.
[2023-12-02 19:25:25,402 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20263 states, 20262 states have (on average 1.6192379824301648) internal successors, (32809), 20262 states have internal predecessors, (32809), 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 19:25:25,445 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20263 states to 20263 states and 32809 transitions.
[2023-12-02 19:25:25,446 INFO  L78                 Accepts]: Start accepts. Automaton has 20263 states and 32809 transitions. Word has length 10085
[2023-12-02 19:25:25,459 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 19:25:25,459 INFO  L495      AbstractCegarLoop]: Abstraction has 20263 states and 32809 transitions.
[2023-12-02 19:25:25,462 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 19:25:25,462 INFO  L276                IsEmpty]: Start isEmpty. Operand 20263 states and 32809 transitions.
[2023-12-02 19:25:26,147 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10090
[2023-12-02 19:25:26,148 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 19:25:26,153 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-02 19:25:26,153 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-12-02 19:25:26,153 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 19:25:26,154 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 19:25:26,164 INFO  L85        PathProgramCache]: Analyzing trace with hash -505725572, now seen corresponding path program 1 times
[2023-12-02 19:25:26,165 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 19:25:26,165 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732611126]
[2023-12-02 19:25:26,167 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 19:25:26,167 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 19:25:27,486 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 19:25:51,128 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 19:25:51,128 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 19:25:51,128 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732611126]
[2023-12-02 19:25:51,129 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732611126] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 19:25:51,129 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 19:25:51,131 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 19:25:51,131 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607723055]
[2023-12-02 19:25:51,131 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 19:25:51,144 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 19:25:51,144 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 19:25:51,155 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 19:25:51,155 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 19:25:51,159 INFO  L87              Difference]: Start difference. First operand 20263 states and 32809 transitions. Second operand  has 3 states, 3 states have (on average 3363.0) internal successors, (10089), 2 states have internal predecessors, (10089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 19:26:28,825 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 19:26:28,825 INFO  L93              Difference]: Finished difference Result 60785 states and 98424 transitions.
[2023-12-02 19:26:28,825 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 19:26:28,828 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3363.0) internal successors, (10089), 2 states have internal predecessors, (10089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10089
[2023-12-02 19:26:28,828 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 19:26:28,904 INFO  L225             Difference]: With dead ends: 60785
[2023-12-02 19:26:28,904 INFO  L226             Difference]: Without dead ends: 40523
[2023-12-02 19:26:28,922 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 19:26:28,923 INFO  L413           NwaCegarLoop]: 8835 mSDtfsCounter, 11077 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29849 mSolverCounterSat, 11743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11077 SdHoareTripleChecker+Valid, 8883 SdHoareTripleChecker+Invalid, 41592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11743 IncrementalHoareTripleChecker+Valid, 29849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.0s IncrementalHoareTripleChecker+Time
[2023-12-02 19:26:28,924 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11077 Valid, 8883 Invalid, 41592 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11743 Valid, 29849 Invalid, 0 Unknown, 0 Unchecked, 37.0s Time]
[2023-12-02 19:26:28,959 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40523 states.
[2023-12-02 19:26:29,563 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40523 to 40523.
[2023-12-02 19:26:29,605 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 40523 states, 40522 states have (on average 1.4731257094911405) internal successors, (59694), 40522 states have internal predecessors, (59694), 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 19:26:29,678 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40523 states to 40523 states and 59694 transitions.
[2023-12-02 19:26:29,678 INFO  L78                 Accepts]: Start accepts. Automaton has 40523 states and 59694 transitions. Word has length 10089
[2023-12-02 19:26:29,681 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 19:26:29,681 INFO  L495      AbstractCegarLoop]: Abstraction has 40523 states and 59694 transitions.
[2023-12-02 19:26:29,683 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3363.0) internal successors, (10089), 2 states have internal predecessors, (10089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-02 19:26:29,683 INFO  L276                IsEmpty]: Start isEmpty. Operand 40523 states and 59694 transitions.
[2023-12-02 19:26:30,393 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10093
[2023-12-02 19:26:30,393 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 19:26:30,398 INFO  L195           NwaCegarLoop]: trace histogram [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, 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 19:26:30,398 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-12-02 19:26:30,398 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 19:26:30,399 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 19:26:30,402 INFO  L85        PathProgramCache]: Analyzing trace with hash -1896520345, now seen corresponding path program 1 times
[2023-12-02 19:26:30,402 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 19:26:30,402 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642446715]
[2023-12-02 19:26:30,403 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 19:26:30,404 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 19:26:31,756 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 19:26:53,620 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 19:26:53,621 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 19:26:53,621 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642446715]
[2023-12-02 19:26:53,621 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642446715] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 19:26:53,621 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 19:26:53,623 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 19:26:53,623 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037106720]
[2023-12-02 19:26:53,623 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 19:26:53,629 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 19:26:53,630 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 19:26:53,638 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 19:26:53,638 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 19:26:53,640 INFO  L87              Difference]: Start difference. First operand 40523 states and 59694 transitions. Second operand  has 3 states, 3 states have (on average 3364.0) internal successors, (10092), 2 states have internal predecessors, (10092), 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 19:27:31,604 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 19:27:31,605 INFO  L93              Difference]: Finished difference Result 121565 states and 179079 transitions.
[2023-12-02 19:27:31,605 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 19:27:31,607 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3364.0) internal successors, (10092), 2 states have internal predecessors, (10092), 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 10092
[2023-12-02 19:27:31,607 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 19:27:31,707 INFO  L225             Difference]: With dead ends: 121565
[2023-12-02 19:27:31,707 INFO  L226             Difference]: Without dead ends: 81043
[2023-12-02 19:27:31,756 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 19:27:31,758 INFO  L413           NwaCegarLoop]: 9444 mSDtfsCounter, 10557 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 31186 mSolverCounterSat, 10928 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10557 SdHoareTripleChecker+Valid, 9493 SdHoareTripleChecker+Invalid, 42114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10928 IncrementalHoareTripleChecker+Valid, 31186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.2s IncrementalHoareTripleChecker+Time
[2023-12-02 19:27:31,758 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10557 Valid, 9493 Invalid, 42114 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10928 Valid, 31186 Invalid, 0 Unknown, 0 Unchecked, 37.2s Time]
[2023-12-02 19:27:31,821 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 81043 states.
[2023-12-02 19:27:32,607 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 81043 to 81043.
[2023-12-02 19:27:32,670 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 81043 states, 81042 states have (on average 1.3614668937094345) internal successors, (110336), 81042 states have internal predecessors, (110336), 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 19:27:32,759 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81043 states to 81043 states and 110336 transitions.
[2023-12-02 19:27:32,759 INFO  L78                 Accepts]: Start accepts. Automaton has 81043 states and 110336 transitions. Word has length 10092
[2023-12-02 19:27:32,761 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 19:27:32,761 INFO  L495      AbstractCegarLoop]: Abstraction has 81043 states and 110336 transitions.
[2023-12-02 19:27:32,763 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3364.0) internal successors, (10092), 2 states have internal predecessors, (10092), 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 19:27:32,763 INFO  L276                IsEmpty]: Start isEmpty. Operand 81043 states and 110336 transitions.
[2023-12-02 19:27:33,482 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10123
[2023-12-02 19:27:33,483 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 19:27:33,487 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:27:33,487 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-12-02 19:27:33,488 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 19:27:33,488 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 19:27:33,491 INFO  L85        PathProgramCache]: Analyzing trace with hash -1719582564, now seen corresponding path program 1 times
[2023-12-02 19:27:33,491 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 19:27:33,491 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612313015]
[2023-12-02 19:27:33,492 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 19:27:33,492 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 19:27:34,784 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 19:28:00,297 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 19:28:00,297 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 19:28:00,297 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612313015]
[2023-12-02 19:28:00,297 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612313015] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 19:28:00,298 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 19:28:00,300 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 19:28:00,300 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737984117]
[2023-12-02 19:28:00,300 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 19:28:00,309 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 19:28:00,309 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 19:28:00,318 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 19:28:00,319 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 19:28:00,321 INFO  L87              Difference]: Start difference. First operand 81043 states and 110336 transitions. Second operand  has 3 states, 3 states have (on average 3374.0) internal successors, (10122), 2 states have internal predecessors, (10122), 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 19:28:38,566 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 19:28:38,566 INFO  L93              Difference]: Finished difference Result 243125 states and 331005 transitions.
[2023-12-02 19:28:38,567 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 19:28:38,569 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3374.0) internal successors, (10122), 2 states have internal predecessors, (10122), 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 10122
[2023-12-02 19:28:38,569 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 19:28:38,777 INFO  L225             Difference]: With dead ends: 243125
[2023-12-02 19:28:38,777 INFO  L226             Difference]: Without dead ends: 162083
[2023-12-02 19:28:38,808 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 19:28:38,809 INFO  L413           NwaCegarLoop]: 6561 mSDtfsCounter, 13042 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 27546 mSolverCounterSat, 13030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13042 SdHoareTripleChecker+Valid, 6609 SdHoareTripleChecker+Invalid, 40576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13030 IncrementalHoareTripleChecker+Valid, 27546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.0s IncrementalHoareTripleChecker+Time
[2023-12-02 19:28:38,810 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [13042 Valid, 6609 Invalid, 40576 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13030 Valid, 27546 Invalid, 0 Unknown, 0 Unchecked, 37.0s Time]
[2023-12-02 19:28:38,925 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 162083 states.
[2023-12-02 19:28:40,032 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 162083 to 162083.
[2023-12-02 19:28:40,139 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 162083 states, 162082 states have (on average 1.2595229575153317) internal successors, (204146), 162082 states have internal predecessors, (204146), 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 19:28:40,318 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 162083 states to 162083 states and 204146 transitions.
[2023-12-02 19:28:40,318 INFO  L78                 Accepts]: Start accepts. Automaton has 162083 states and 204146 transitions. Word has length 10122
[2023-12-02 19:28:40,320 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 19:28:40,320 INFO  L495      AbstractCegarLoop]: Abstraction has 162083 states and 204146 transitions.
[2023-12-02 19:28:40,322 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3374.0) internal successors, (10122), 2 states have internal predecessors, (10122), 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 19:28:40,322 INFO  L276                IsEmpty]: Start isEmpty. Operand 162083 states and 204146 transitions.
[2023-12-02 19:28:41,343 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10203
[2023-12-02 19:28:41,344 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 19:28:41,349 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 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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 19:28:41,349 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-12-02 19:28:41,349 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 19:28:41,350 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 19:28:41,354 INFO  L85        PathProgramCache]: Analyzing trace with hash 425576318, now seen corresponding path program 1 times
[2023-12-02 19:28:41,354 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 19:28:41,354 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903779523]
[2023-12-02 19:28:41,356 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 19:28:41,356 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 19:28:42,664 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 19:29:06,053 INFO  L134       CoverageAnalysis]: Checked inductivity of 159 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked.
[2023-12-02 19:29:06,053 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 19:29:06,054 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903779523]
[2023-12-02 19:29:06,054 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903779523] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 19:29:06,054 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 19:29:06,055 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 19:29:06,055 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342172100]
[2023-12-02 19:29:06,055 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 19:29:06,063 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 19:29:06,064 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 19:29:06,070 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 19:29:06,070 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 19:29:06,073 INFO  L87              Difference]: Start difference. First operand 162083 states and 204146 transitions. Second operand  has 3 states, 3 states have (on average 3376.6666666666665) internal successors, (10130), 2 states have internal predecessors, (10130), 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 19:29:44,271 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 19:29:44,271 INFO  L93              Difference]: Finished difference Result 486245 states and 612435 transitions.
[2023-12-02 19:29:44,271 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 19:29:44,273 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3376.6666666666665) internal successors, (10130), 2 states have internal predecessors, (10130), 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 10202
[2023-12-02 19:29:44,273 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 19:29:44,901 INFO  L225             Difference]: With dead ends: 486245
[2023-12-02 19:29:44,901 INFO  L226             Difference]: Without dead ends: 324163
[2023-12-02 19:29:45,136 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 19:29:45,137 INFO  L413           NwaCegarLoop]: 6017 mSDtfsCounter, 12768 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29088 mSolverCounterSat, 11670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12768 SdHoareTripleChecker+Valid, 6065 SdHoareTripleChecker+Invalid, 40758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11670 IncrementalHoareTripleChecker+Valid, 29088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.4s IncrementalHoareTripleChecker+Time
[2023-12-02 19:29:45,137 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12768 Valid, 6065 Invalid, 40758 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11670 Valid, 29088 Invalid, 0 Unknown, 0 Unchecked, 36.4s Time]
[2023-12-02 19:29:45,320 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 324163 states.
[2023-12-02 19:29:47,752 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 324163 to 324163.
[2023-12-02 19:29:47,911 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 324163 states, 324162 states have (on average 1.1973149227855209) internal successors, (388124), 324162 states have internal predecessors, (388124), 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 19:29:48,305 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 324163 states to 324163 states and 388124 transitions.
[2023-12-02 19:29:48,305 INFO  L78                 Accepts]: Start accepts. Automaton has 324163 states and 388124 transitions. Word has length 10202
[2023-12-02 19:29:48,308 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 19:29:48,308 INFO  L495      AbstractCegarLoop]: Abstraction has 324163 states and 388124 transitions.
[2023-12-02 19:29:48,310 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3376.6666666666665) internal successors, (10130), 2 states have internal predecessors, (10130), 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 19:29:48,310 INFO  L276                IsEmpty]: Start isEmpty. Operand 324163 states and 388124 transitions.
[2023-12-02 19:29:49,476 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10273
[2023-12-02 19:29:49,476 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 19:29:49,480 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:29:49,480 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-12-02 19:29:49,480 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 19:29:49,481 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 19:29:49,484 INFO  L85        PathProgramCache]: Analyzing trace with hash -897141595, now seen corresponding path program 1 times
[2023-12-02 19:29:49,484 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 19:29:49,484 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771329827]
[2023-12-02 19:29:49,486 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 19:29:49,486 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 19:29:51,187 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 19:30:14,107 INFO  L134       CoverageAnalysis]: Checked inductivity of 186 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-02 19:30:14,108 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 19:30:14,108 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771329827]
[2023-12-02 19:30:14,108 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771329827] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 19:30:14,108 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 19:30:14,109 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 19:30:14,110 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402291872]
[2023-12-02 19:30:14,110 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 19:30:14,116 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 19:30:14,116 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 19:30:14,123 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 19:30:14,123 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 19:30:14,125 INFO  L87              Difference]: Start difference. First operand 324163 states and 388124 transitions. Second operand  has 3 states, 3 states have (on average 3424.0) internal successors, (10272), 2 states have internal predecessors, (10272), 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 19:30:53,787 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 19:30:53,787 INFO  L93              Difference]: Finished difference Result 972485 states and 1164369 transitions.
[2023-12-02 19:30:53,788 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 19:30:53,789 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3424.0) internal successors, (10272), 2 states have internal predecessors, (10272), 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 10272
[2023-12-02 19:30:53,790 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 19:30:54,437 INFO  L225             Difference]: With dead ends: 972485
[2023-12-02 19:30:54,438 INFO  L226             Difference]: Without dead ends: 648323
[2023-12-02 19:30:54,569 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 19:30:54,570 INFO  L413           NwaCegarLoop]: 8997 mSDtfsCounter, 10689 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 31560 mSolverCounterSat, 10501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10689 SdHoareTripleChecker+Valid, 9045 SdHoareTripleChecker+Invalid, 42061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10501 IncrementalHoareTripleChecker+Valid, 31560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.8s IncrementalHoareTripleChecker+Time
[2023-12-02 19:30:54,570 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10689 Valid, 9045 Invalid, 42061 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10501 Valid, 31560 Invalid, 0 Unknown, 0 Unchecked, 36.8s Time]
[2023-12-02 19:30:55,198 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 648323 states.
[2023-12-02 19:31:00,151 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 648323 to 648323.
[2023-12-02 19:31:00,429 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 648323 states, 648322 states have (on average 1.1502833468554206) internal successors, (745754), 648322 states have internal predecessors, (745754), 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 19:31:01,684 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 648323 states to 648323 states and 745754 transitions.
[2023-12-02 19:31:01,685 INFO  L78                 Accepts]: Start accepts. Automaton has 648323 states and 745754 transitions. Word has length 10272
[2023-12-02 19:31:01,685 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 19:31:01,686 INFO  L495      AbstractCegarLoop]: Abstraction has 648323 states and 745754 transitions.
[2023-12-02 19:31:01,687 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3424.0) internal successors, (10272), 2 states have internal predecessors, (10272), 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 19:31:01,687 INFO  L276                IsEmpty]: Start isEmpty. Operand 648323 states and 745754 transitions.
[2023-12-02 19:31:03,588 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10642
[2023-12-02 19:31:03,588 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 19:31:03,591 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-12-02 19:31:03,591 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2023-12-02 19:31:03,591 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 19:31:03,592 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 19:31:03,593 INFO  L85        PathProgramCache]: Analyzing trace with hash 1787310061, now seen corresponding path program 1 times
[2023-12-02 19:31:03,593 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 19:31:03,593 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077555464]
[2023-12-02 19:31:03,594 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 19:31:03,594 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 19:31:05,160 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 19:31:29,561 INFO  L134       CoverageAnalysis]: Checked inductivity of 636 backedges. 552 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2023-12-02 19:31:29,562 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 19:31:29,562 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077555464]
[2023-12-02 19:31:29,562 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077555464] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 19:31:29,562 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 19:31:29,564 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-02 19:31:29,564 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510061441]
[2023-12-02 19:31:29,564 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 19:31:29,571 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 19:31:29,572 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 19:31:29,580 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 19:31:29,581 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 19:31:29,583 INFO  L87              Difference]: Start difference. First operand 648323 states and 745754 transitions. Second operand  has 3 states, 3 states have (on average 3519.3333333333335) internal successors, (10558), 2 states have internal predecessors, (10558), 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 19:32:10,903 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 19:32:10,903 INFO  L93              Difference]: Finished difference Result 1944965 states and 2237259 transitions.
[2023-12-02 19:32:10,904 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 19:32:10,905 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3519.3333333333335) internal successors, (10558), 2 states have internal predecessors, (10558), 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 10641
[2023-12-02 19:32:10,906 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 19:32:12,309 INFO  L225             Difference]: With dead ends: 1944965
[2023-12-02 19:32:12,309 INFO  L226             Difference]: Without dead ends: 1296643
[2023-12-02 19:32:12,853 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 19:32:12,857 INFO  L413           NwaCegarLoop]: 5999 mSDtfsCounter, 12063 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29744 mSolverCounterSat, 11034 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12063 SdHoareTripleChecker+Valid, 6047 SdHoareTripleChecker+Invalid, 40778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11034 IncrementalHoareTripleChecker+Valid, 29744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.5s IncrementalHoareTripleChecker+Time
[2023-12-02 19:32:12,857 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12063 Valid, 6047 Invalid, 40778 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11034 Valid, 29744 Invalid, 0 Unknown, 0 Unchecked, 35.5s Time]
[2023-12-02 19:32:13,768 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1296643 states.
[2023-12-02 19:32:24,017 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296643 to 1296643.
[2023-12-02 19:32:24,735 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1296643 states, 1296642 states have (on average 1.1119877344710414) internal successors, (1441850), 1296642 states have internal predecessors, (1441850), 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 19:32:27,125 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1296643 states to 1296643 states and 1441850 transitions.
[2023-12-02 19:32:27,126 INFO  L78                 Accepts]: Start accepts. Automaton has 1296643 states and 1441850 transitions. Word has length 10641
[2023-12-02 19:32:27,126 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 19:32:27,126 INFO  L495      AbstractCegarLoop]: Abstraction has 1296643 states and 1441850 transitions.
[2023-12-02 19:32:27,128 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3519.3333333333335) internal successors, (10558), 2 states have internal predecessors, (10558), 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 19:32:27,128 INFO  L276                IsEmpty]: Start isEmpty. Operand 1296643 states and 1441850 transitions.