./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem07_label54.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 2329fc70
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_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem07_label54.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --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 d4dfd97ceb6762815130c4cc12d2984f7fae2d1a6dacba5070982f7eed440802
--- Real Ultimate output ---
[0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset.
This is Ultimate 0.2.2-dev-2329fc7
[2022-12-14 15:41:24,556 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-12-14 15:41:24,558 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-12-14 15:41:24,576 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-12-14 15:41:24,576 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-12-14 15:41:24,577 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-12-14 15:41:24,578 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-12-14 15:41:24,580 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-12-14 15:41:24,581 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-12-14 15:41:24,582 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-12-14 15:41:24,583 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-12-14 15:41:24,584 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-12-14 15:41:24,584 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-12-14 15:41:24,585 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-12-14 15:41:24,586 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-12-14 15:41:24,587 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-12-14 15:41:24,588 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-12-14 15:41:24,589 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-12-14 15:41:24,590 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-12-14 15:41:24,592 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-12-14 15:41:24,593 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-12-14 15:41:24,594 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-12-14 15:41:24,595 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-12-14 15:41:24,596 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-12-14 15:41:24,599 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-12-14 15:41:24,599 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-12-14 15:41:24,600 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-12-14 15:41:24,601 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-12-14 15:41:24,601 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-12-14 15:41:24,602 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-12-14 15:41:24,602 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-12-14 15:41:24,603 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-12-14 15:41:24,603 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-12-14 15:41:24,604 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-12-14 15:41:24,605 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-12-14 15:41:24,605 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-12-14 15:41:24,606 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-12-14 15:41:24,606 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-12-14 15:41:24,606 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-12-14 15:41:24,607 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-12-14 15:41:24,607 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-12-14 15:41:24,608 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf
[2022-12-14 15:41:24,624 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-12-14 15:41:24,624 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-12-14 15:41:24,624 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-12-14 15:41:24,633 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-12-14 15:41:24,634 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-12-14 15:41:24,634 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-12-14 15:41:24,635 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2022-12-14 15:41:24,635 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2022-12-14 15:41:24,635 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2022-12-14 15:41:24,635 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2022-12-14 15:41:24,635 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2022-12-14 15:41:24,636 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2022-12-14 15:41:24,636 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2022-12-14 15:41:24,636 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2022-12-14 15:41:24,636 INFO  L138        SettingsManager]:  * Interval Domain=false
[2022-12-14 15:41:24,636 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2022-12-14 15:41:24,636 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2022-12-14 15:41:24,637 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2022-12-14 15:41:24,637 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-12-14 15:41:24,638 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-12-14 15:41:24,638 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-12-14 15:41:24,638 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-12-14 15:41:24,638 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-12-14 15:41:24,638 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-12-14 15:41:24,638 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-12-14 15:41:24,639 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-12-14 15:41:24,639 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-12-14 15:41:24,639 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-12-14 15:41:24,639 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-12-14 15:41:24,639 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-12-14 15:41:24,639 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-12-14 15:41:24,640 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-12-14 15:41:24,640 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-12-14 15:41:24,640 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-12-14 15:41:24,640 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2022-12-14 15:41:24,640 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-12-14 15:41:24,641 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-12-14 15:41:24,641 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2022-12-14 15:41:24,641 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-12-14 15:41:24,641 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-12-14 15:41:24,641 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-12-14 15:41:24,641 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
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_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh/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_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
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 -> d4dfd97ceb6762815130c4cc12d2984f7fae2d1a6dacba5070982f7eed440802
[2022-12-14 15:41:24,838 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-12-14 15:41:24,853 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-12-14 15:41:24,855 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-12-14 15:41:24,856 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-12-14 15:41:24,857 INFO  L275        PluginConnector]: CDTParser initialized
[2022-12-14 15:41:24,858 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/eca-rers2012/Problem07_label54.c
[2022-12-14 15:41:27,463 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2022-12-14 15:41:28,560 INFO  L351              CDTParser]: Found 1 translation units.
[2022-12-14 15:41:28,560 INFO  L172              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/sv-benchmarks/c/eca-rers2012/Problem07_label54.c
[2022-12-14 15:41:28,704 INFO  L394              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh/data/1a275c02f/5273be7023574504b0b89b99978b13c0/FLAG08f60307b
[2022-12-14 15:41:28,713 INFO  L402              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh/data/1a275c02f/5273be7023574504b0b89b99978b13c0
[2022-12-14 15:41:28,715 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-12-14 15:41:28,716 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-12-14 15:41:28,717 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-12-14 15:41:28,717 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-12-14 15:41:28,720 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-12-14 15:41:28,720 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:41:28" (1/1) ...
[2022-12-14 15:41:28,721 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55cf4f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:28, skipping insertion in model container
[2022-12-14 15:41:28,721 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:41:28" (1/1) ...
[2022-12-14 15:41:28,726 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-12-14 15:41:29,375 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-12-14 15:41:38,918 WARN  L237   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_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/sv-benchmarks/c/eca-rers2012/Problem07_label54.c[2775294,2775307]
[2022-12-14 15:41:38,969 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-12-14 15:41:38,977 INFO  L203         MainTranslator]: Completed pre-run
[2022-12-14 15:41:44,889 WARN  L237   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_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/sv-benchmarks/c/eca-rers2012/Problem07_label54.c[2775294,2775307]
[2022-12-14 15:41:44,893 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-12-14 15:41:45,603 INFO  L208         MainTranslator]: Completed translation
[2022-12-14 15:41:45,603 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:45 WrapperNode
[2022-12-14 15:41:45,603 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-12-14 15:41:45,604 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-12-14 15:41:45,604 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-12-14 15:41:45,604 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-12-14 15:41:45,609 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:45" (1/1) ...
[2022-12-14 15:41:45,967 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:45" (1/1) ...
[2022-12-14 15:41:47,319 INFO  L138                Inliner]: procedures = 59, calls = 53, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 83773
[2022-12-14 15:41:47,319 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-12-14 15:41:47,320 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-12-14 15:41:47,320 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-12-14 15:41:47,320 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-12-14 15:41:47,327 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:45" (1/1) ...
[2022-12-14 15:41:47,327 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:45" (1/1) ...
[2022-12-14 15:41:47,509 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:45" (1/1) ...
[2022-12-14 15:41:47,510 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:45" (1/1) ...
[2022-12-14 15:41:48,143 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:45" (1/1) ...
[2022-12-14 15:41:48,255 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:45" (1/1) ...
[2022-12-14 15:41:48,338 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:45" (1/1) ...
[2022-12-14 15:41:48,399 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:45" (1/1) ...
[2022-12-14 15:41:48,691 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-12-14 15:41:48,692 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-12-14 15:41:48,692 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-12-14 15:41:48,692 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-12-14 15:41:48,693 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:45" (1/1) ...
[2022-12-14 15:41:48,698 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-12-14 15:41:48,707 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh/z3
[2022-12-14 15:41:48,716 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-12-14 15:41:48,718 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e2c0d07-1b4e-4a22-a5fa-7e89e6cd8e3a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-12-14 15:41:48,742 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-12-14 15:41:48,742 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-12-14 15:41:48,743 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-12-14 15:41:48,743 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-12-14 15:41:48,850 INFO  L235             CfgBuilder]: Building ICFG
[2022-12-14 15:41:48,852 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-12-14 15:42:22,621 INFO  L276             CfgBuilder]: Performing block encoding
[2022-12-14 15:42:23,340 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-12-14 15:42:23,340 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-12-14 15:42:23,348 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:42:23 BoogieIcfgContainer
[2022-12-14 15:42:23,348 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-12-14 15:42:23,351 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-12-14 15:42:23,351 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-12-14 15:42:23,353 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-12-14 15:42:23,353 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:41:28" (1/3) ...
[2022-12-14 15:42:23,354 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cb79b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:42:23, skipping insertion in model container
[2022-12-14 15:42:23,354 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:45" (2/3) ...
[2022-12-14 15:42:23,354 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cb79b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:42:23, skipping insertion in model container
[2022-12-14 15:42:23,354 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:42:23" (3/3) ...
[2022-12-14 15:42:23,355 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem07_label54.c
[2022-12-14 15:42:23,370 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-12-14 15:42:23,370 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-12-14 15:42:23,499 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-12-14 15:42:23,506 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=LoopsAndPotentialCycles, 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;@7de0f3cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-12-14 15:42:23,506 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-12-14 15:42:23,538 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)
[2022-12-14 15:42:24,113 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10086
[2022-12-14 15:42:24,113 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:42:24,116 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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[2022-12-14 15:42:24,117 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:42:24,124 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:42:24,127 INFO  L85        PathProgramCache]: Analyzing trace with hash 184882937, now seen corresponding path program 1 times
[2022-12-14 15:42:24,133 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:42:24,133 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656761833]
[2022-12-14 15:42:24,136 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:42:24,136 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:42:26,121 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:42:52,576 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 15:42:52,576 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:42:52,576 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656761833]
[2022-12-14 15:42:52,577 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656761833] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:42:52,577 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:42:52,579 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:42:52,580 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894433517]
[2022-12-14 15:42:52,581 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:42:52,595 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:42:52,595 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:42:52,633 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:42:52,634 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:42:52,661 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)
[2022-12-14 15:43:23,463 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:43:23,463 INFO  L93              Difference]: Finished difference Result 30401 states and 60647 transitions.
[2022-12-14 15:43:23,465 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:43:23,468 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
[2022-12-14 15:43:23,482 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:43:23,538 INFO  L225             Difference]: With dead ends: 30401
[2022-12-14 15:43:23,538 INFO  L226             Difference]: Without dead ends: 20263
[2022-12-14 15:43:23,551 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
[2022-12-14 15:43:23,553 INFO  L413           NwaCegarLoop]: 722 mSDtfsCounter, 431 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 33587 mSolverCounterSat, 12062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 45649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 12062 IncrementalHoareTripleChecker+Valid, 33587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time
[2022-12-14 15:43:23,554 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 772 Invalid, 45649 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [12062 Valid, 33587 Invalid, 0 Unknown, 0 Unchecked, 30.2s Time]
[2022-12-14 15:43:23,585 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20263 states.
[2022-12-14 15:43:23,870 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20263 to 20263.
[2022-12-14 15:43:23,898 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20263 states, 20262 states have (on average 1.9627381304905736) internal successors, (39769), 20262 states have internal predecessors, (39769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:43:23,931 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20263 states to 20263 states and 39769 transitions.
[2022-12-14 15:43:23,932 INFO  L78                 Accepts]: Start accepts. Automaton has 20263 states and 39769 transitions. Word has length 10085
[2022-12-14 15:43:23,941 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:43:23,941 INFO  L495      AbstractCegarLoop]: Abstraction has 20263 states and 39769 transitions.
[2022-12-14 15:43:23,943 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)
[2022-12-14 15:43:23,943 INFO  L276                IsEmpty]: Start isEmpty. Operand 20263 states and 39769 transitions.
[2022-12-14 15:43:24,545 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10091
[2022-12-14 15:43:24,545 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:43:24,548 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-12-14 15:43:24,549 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-12-14 15:43:24,549 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:43:24,550 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:43:24,553 INFO  L85        PathProgramCache]: Analyzing trace with hash 1936509543, now seen corresponding path program 1 times
[2022-12-14 15:43:24,553 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:43:24,553 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979912810]
[2022-12-14 15:43:24,554 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:43:24,554 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:43:25,662 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:43:45,985 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 15:43:45,985 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:43:45,986 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979912810]
[2022-12-14 15:43:45,986 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979912810] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:43:45,986 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:43:45,989 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:43:45,989 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944414595]
[2022-12-14 15:43:45,989 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:43:46,013 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:43:46,013 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:43:46,025 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:43:46,026 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:43:46,029 INFO  L87              Difference]: Start difference. First operand 20263 states and 39769 transitions. Second operand  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:44:16,855 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:44:16,855 INFO  L93              Difference]: Finished difference Result 60785 states and 119304 transitions.
[2022-12-14 15:44:16,855 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:44:16,857 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10090
[2022-12-14 15:44:16,857 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:44:16,925 INFO  L225             Difference]: With dead ends: 60785
[2022-12-14 15:44:16,925 INFO  L226             Difference]: Without dead ends: 40523
[2022-12-14 15:44:16,934 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
[2022-12-14 15:44:16,935 INFO  L413           NwaCegarLoop]: 4819 mSDtfsCounter, 13626 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 28708 mSolverCounterSat, 11677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13626 SdHoareTripleChecker+Valid, 4867 SdHoareTripleChecker+Invalid, 40385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11677 IncrementalHoareTripleChecker+Valid, 28708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time
[2022-12-14 15:44:16,935 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [13626 Valid, 4867 Invalid, 40385 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11677 Valid, 28708 Invalid, 0 Unknown, 0 Unchecked, 30.2s Time]
[2022-12-14 15:44:16,960 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40523 states.
[2022-12-14 15:44:17,304 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40523 to 40523.
[2022-12-14 15:44:17,339 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 40523 states, 40522 states have (on average 1.735797838211342) internal successors, (70338), 40522 states have internal predecessors, (70338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:44:17,384 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40523 states to 40523 states and 70338 transitions.
[2022-12-14 15:44:17,385 INFO  L78                 Accepts]: Start accepts. Automaton has 40523 states and 70338 transitions. Word has length 10090
[2022-12-14 15:44:17,386 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:44:17,386 INFO  L495      AbstractCegarLoop]: Abstraction has 40523 states and 70338 transitions.
[2022-12-14 15:44:17,387 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:44:17,388 INFO  L276                IsEmpty]: Start isEmpty. Operand 40523 states and 70338 transitions.
[2022-12-14 15:44:17,958 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10101
[2022-12-14 15:44:17,958 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:44:17,960 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2022-12-14 15:44:17,961 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-12-14 15:44:17,961 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:44:17,961 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:44:17,965 INFO  L85        PathProgramCache]: Analyzing trace with hash -216812786, now seen corresponding path program 1 times
[2022-12-14 15:44:17,965 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:44:17,965 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606125487]
[2022-12-14 15:44:17,966 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:44:17,967 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:44:18,972 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:44:41,446 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 15:44:41,446 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:44:41,446 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606125487]
[2022-12-14 15:44:41,447 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606125487] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:44:41,447 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:44:41,448 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:44:41,448 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362573685]
[2022-12-14 15:44:41,448 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:44:41,452 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:44:41,453 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:44:41,458 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:44:41,458 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:44:41,460 INFO  L87              Difference]: Start difference. First operand 40523 states and 70338 transitions. Second operand  has 3 states, 3 states have (on average 3366.6666666666665) internal successors, (10100), 2 states have internal predecessors, (10100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:45:10,299 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:45:10,299 INFO  L93              Difference]: Finished difference Result 121567 states and 211012 transitions.
[2022-12-14 15:45:10,299 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:45:10,301 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3366.6666666666665) internal successors, (10100), 2 states have internal predecessors, (10100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10100
[2022-12-14 15:45:10,301 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:45:10,365 INFO  L225             Difference]: With dead ends: 121567
[2022-12-14 15:45:10,365 INFO  L226             Difference]: Without dead ends: 81045
[2022-12-14 15:45:10,385 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
[2022-12-14 15:45:10,386 INFO  L413           NwaCegarLoop]: 7615 mSDtfsCounter, 11995 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 34989 mSolverCounterSat, 6981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11995 SdHoareTripleChecker+Valid, 7664 SdHoareTripleChecker+Invalid, 41970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6981 IncrementalHoareTripleChecker+Valid, 34989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.1s IncrementalHoareTripleChecker+Time
[2022-12-14 15:45:10,386 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11995 Valid, 7664 Invalid, 41970 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6981 Valid, 34989 Invalid, 0 Unknown, 0 Unchecked, 28.1s Time]
[2022-12-14 15:45:10,426 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 81045 states.
[2022-12-14 15:45:10,977 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 81045 to 81043.
[2022-12-14 15:45:11,033 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 81043 states, 81042 states have (on average 1.5543545322178622) internal successors, (125968), 81042 states have internal predecessors, (125968), 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)
[2022-12-14 15:45:11,122 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81043 states to 81043 states and 125968 transitions.
[2022-12-14 15:45:11,122 INFO  L78                 Accepts]: Start accepts. Automaton has 81043 states and 125968 transitions. Word has length 10100
[2022-12-14 15:45:11,123 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:45:11,123 INFO  L495      AbstractCegarLoop]: Abstraction has 81043 states and 125968 transitions.
[2022-12-14 15:45:11,124 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3366.6666666666665) internal successors, (10100), 2 states have internal predecessors, (10100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:45:11,124 INFO  L276                IsEmpty]: Start isEmpty. Operand 81043 states and 125968 transitions.
[2022-12-14 15:45:11,763 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10102
[2022-12-14 15:45:11,763 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:45:11,766 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-12-14 15:45:11,766 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-12-14 15:45:11,766 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:45:11,766 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:45:11,768 INFO  L85        PathProgramCache]: Analyzing trace with hash -101136088, now seen corresponding path program 1 times
[2022-12-14 15:45:11,768 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:45:11,768 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352231975]
[2022-12-14 15:45:11,769 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:45:11,769 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:45:12,839 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:45:34,195 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2022-12-14 15:45:34,195 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:45:34,195 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352231975]
[2022-12-14 15:45:34,195 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352231975] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:45:34,195 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:45:34,196 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:45:34,196 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354462194]
[2022-12-14 15:45:34,196 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:45:34,202 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:45:34,202 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:45:34,207 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:45:34,207 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:45:34,209 INFO  L87              Difference]: Start difference. First operand 81043 states and 125968 transitions. Second operand  has 3 states, 3 states have (on average 3365.6666666666665) internal successors, (10097), 2 states have internal predecessors, (10097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:46:03,355 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:46:03,356 INFO  L93              Difference]: Finished difference Result 243125 states and 377901 transitions.
[2022-12-14 15:46:03,356 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:46:03,357 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3365.6666666666665) internal successors, (10097), 2 states have internal predecessors, (10097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10101
[2022-12-14 15:46:03,357 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:46:03,532 INFO  L225             Difference]: With dead ends: 243125
[2022-12-14 15:46:03,533 INFO  L226             Difference]: Without dead ends: 162083
[2022-12-14 15:46:03,560 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
[2022-12-14 15:46:03,561 INFO  L413           NwaCegarLoop]: 6551 mSDtfsCounter, 13000 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 27460 mSolverCounterSat, 13030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13000 SdHoareTripleChecker+Valid, 6599 SdHoareTripleChecker+Invalid, 40490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13030 IncrementalHoareTripleChecker+Valid, 27460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.2s IncrementalHoareTripleChecker+Time
[2022-12-14 15:46:03,562 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [13000 Valid, 6599 Invalid, 40490 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13030 Valid, 27460 Invalid, 0 Unknown, 0 Unchecked, 28.2s Time]
[2022-12-14 15:46:03,644 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 162083 states.
[2022-12-14 15:46:04,726 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 162083 to 162083.
[2022-12-14 15:46:04,806 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 162083 states, 162082 states have (on average 1.402105107291371) internal successors, (227256), 162082 states have internal predecessors, (227256), 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)
[2022-12-14 15:46:04,981 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 162083 states to 162083 states and 227256 transitions.
[2022-12-14 15:46:04,981 INFO  L78                 Accepts]: Start accepts. Automaton has 162083 states and 227256 transitions. Word has length 10101
[2022-12-14 15:46:04,982 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:46:04,982 INFO  L495      AbstractCegarLoop]: Abstraction has 162083 states and 227256 transitions.
[2022-12-14 15:46:04,983 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3365.6666666666665) internal successors, (10097), 2 states have internal predecessors, (10097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:46:04,983 INFO  L276                IsEmpty]: Start isEmpty. Operand 162083 states and 227256 transitions.
[2022-12-14 15:46:05,818 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10105
[2022-12-14 15:46:05,818 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:46:05,821 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-12-14 15:46:05,821 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-12-14 15:46:05,821 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:46:05,822 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:46:05,824 INFO  L85        PathProgramCache]: Analyzing trace with hash -1955931034, now seen corresponding path program 1 times
[2022-12-14 15:46:05,824 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:46:05,824 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852828087]
[2022-12-14 15:46:05,825 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:46:05,825 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:46:07,117 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:46:25,803 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2022-12-14 15:46:25,803 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:46:25,803 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852828087]
[2022-12-14 15:46:25,803 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852828087] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:46:25,803 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:46:25,804 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:46:25,804 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41152561]
[2022-12-14 15:46:25,804 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:46:25,809 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:46:25,809 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:46:25,813 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:46:25,813 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:46:25,815 INFO  L87              Difference]: Start difference. First operand 162083 states and 227256 transitions. Second operand  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:46:56,274 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:46:56,274 INFO  L93              Difference]: Finished difference Result 486245 states and 681765 transitions.
[2022-12-14 15:46:56,274 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:46:56,275 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10104
[2022-12-14 15:46:56,275 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:46:56,694 INFO  L225             Difference]: With dead ends: 486245
[2022-12-14 15:46:56,694 INFO  L226             Difference]: Without dead ends: 324163
[2022-12-14 15:46:56,746 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
[2022-12-14 15:46:56,747 INFO  L413           NwaCegarLoop]: 7227 mSDtfsCounter, 12196 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29365 mSolverCounterSat, 11755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12196 SdHoareTripleChecker+Valid, 7275 SdHoareTripleChecker+Invalid, 41120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11755 IncrementalHoareTripleChecker+Valid, 29365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.8s IncrementalHoareTripleChecker+Time
[2022-12-14 15:46:56,747 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12196 Valid, 7275 Invalid, 41120 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11755 Valid, 29365 Invalid, 0 Unknown, 0 Unchecked, 28.8s Time]
[2022-12-14 15:46:56,910 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 324163 states.
[2022-12-14 15:46:59,099 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 324163 to 324163.
[2022-12-14 15:46:59,302 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 324163 states, 324162 states have (on average 1.305415193637749) internal successors, (423166), 324162 states have internal predecessors, (423166), 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)
[2022-12-14 15:46:59,889 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 324163 states to 324163 states and 423166 transitions.
[2022-12-14 15:46:59,889 INFO  L78                 Accepts]: Start accepts. Automaton has 324163 states and 423166 transitions. Word has length 10104
[2022-12-14 15:46:59,890 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:46:59,891 INFO  L495      AbstractCegarLoop]: Abstraction has 324163 states and 423166 transitions.
[2022-12-14 15:46:59,892 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:46:59,893 INFO  L276                IsEmpty]: Start isEmpty. Operand 324163 states and 423166 transitions.
[2022-12-14 15:47:00,906 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10107
[2022-12-14 15:47:00,907 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:47:00,909 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2022-12-14 15:47:00,909 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2022-12-14 15:47:00,909 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:47:00,909 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:47:00,911 INFO  L85        PathProgramCache]: Analyzing trace with hash -10811329, now seen corresponding path program 1 times
[2022-12-14 15:47:00,911 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:47:00,911 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532820385]
[2022-12-14 15:47:00,912 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:47:00,912 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:47:01,922 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:47:27,245 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 15:47:27,246 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:47:27,246 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532820385]
[2022-12-14 15:47:27,246 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532820385] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:47:27,246 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:47:27,247 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:47:27,247 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089131272]
[2022-12-14 15:47:27,247 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:47:27,251 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:47:27,251 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:47:27,255 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:47:27,256 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:47:27,258 INFO  L87              Difference]: Start difference. First operand 324163 states and 423166 transitions. Second operand  has 3 states, 3 states have (on average 3368.6666666666665) internal successors, (10106), 2 states have internal predecessors, (10106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:47:55,349 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:47:55,350 INFO  L93              Difference]: Finished difference Result 810405 states and 1042559 transitions.
[2022-12-14 15:47:55,350 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:47:55,352 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3368.6666666666665) internal successors, (10106), 2 states have internal predecessors, (10106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10106
[2022-12-14 15:47:55,352 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:47:55,863 INFO  L225             Difference]: With dead ends: 810405
[2022-12-14 15:47:55,863 INFO  L226             Difference]: Without dead ends: 486243
[2022-12-14 15:47:55,964 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
[2022-12-14 15:47:55,965 INFO  L413           NwaCegarLoop]: 8142 mSDtfsCounter, 11009 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 28442 mSolverCounterSat, 7491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11009 SdHoareTripleChecker+Valid, 8190 SdHoareTripleChecker+Invalid, 35933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7491 IncrementalHoareTripleChecker+Valid, 28442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time
[2022-12-14 15:47:55,965 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11009 Valid, 8190 Invalid, 35933 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7491 Valid, 28442 Invalid, 0 Unknown, 0 Unchecked, 25.7s Time]
[2022-12-14 15:47:56,239 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 486243 states.
[2022-12-14 15:48:00,095 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 486243 to 486243.
[2022-12-14 15:48:00,290 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 486243 states, 486242 states have (on average 1.2375237021894447) internal successors, (601736), 486242 states have internal predecessors, (601736), 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)
[2022-12-14 15:48:01,029 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 486243 states to 486243 states and 601736 transitions.
[2022-12-14 15:48:01,029 INFO  L78                 Accepts]: Start accepts. Automaton has 486243 states and 601736 transitions. Word has length 10106
[2022-12-14 15:48:01,029 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:48:01,029 INFO  L495      AbstractCegarLoop]: Abstraction has 486243 states and 601736 transitions.
[2022-12-14 15:48:01,031 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3368.6666666666665) internal successors, (10106), 2 states have internal predecessors, (10106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:48:01,031 INFO  L276                IsEmpty]: Start isEmpty. Operand 486243 states and 601736 transitions.
[2022-12-14 15:48:02,152 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10136
[2022-12-14 15:48:02,152 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:48:02,155 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-12-14 15:48:02,155 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2022-12-14 15:48:02,155 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:48:02,155 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:48:02,157 INFO  L85        PathProgramCache]: Analyzing trace with hash 224977230, now seen corresponding path program 1 times
[2022-12-14 15:48:02,157 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:48:02,157 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595132989]
[2022-12-14 15:48:02,158 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:48:02,158 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:48:03,295 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:48:24,003 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 15:48:24,003 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:48:24,003 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595132989]
[2022-12-14 15:48:24,003 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595132989] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:48:24,003 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:48:24,004 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:48:24,004 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138597569]
[2022-12-14 15:48:24,004 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:48:24,008 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:48:24,008 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:48:24,012 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:48:24,012 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:48:24,014 INFO  L87              Difference]: Start difference. First operand 486243 states and 601736 transitions. Second operand  has 3 states, 3 states have (on average 3378.3333333333335) internal successors, (10135), 2 states have internal predecessors, (10135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:48:56,026 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:48:56,026 INFO  L93              Difference]: Finished difference Result 1458725 states and 1805205 transitions.
[2022-12-14 15:48:56,027 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:48:56,029 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3378.3333333333335) internal successors, (10135), 2 states have internal predecessors, (10135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10135
[2022-12-14 15:48:56,029 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:48:57,191 INFO  L225             Difference]: With dead ends: 1458725
[2022-12-14 15:48:57,191 INFO  L226             Difference]: Without dead ends: 972483
[2022-12-14 15:48:57,369 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
[2022-12-14 15:48:57,369 INFO  L413           NwaCegarLoop]: 8085 mSDtfsCounter, 11263 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 30689 mSolverCounterSat, 11046 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11263 SdHoareTripleChecker+Valid, 8133 SdHoareTripleChecker+Invalid, 41735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11046 IncrementalHoareTripleChecker+Valid, 30689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.0s IncrementalHoareTripleChecker+Time
[2022-12-14 15:48:57,370 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11263 Valid, 8133 Invalid, 41735 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11046 Valid, 30689 Invalid, 0 Unknown, 0 Unchecked, 28.0s Time]
[2022-12-14 15:48:58,027 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 972483 states.
[2022-12-14 15:49:05,273 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 972483 to 972483.
[2022-12-14 15:49:05,579 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 972483 states, 972482 states have (on average 1.1821504151233648) internal successors, (1149620), 972482 states have internal predecessors, (1149620), 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)
[2022-12-14 15:49:07,193 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 972483 states to 972483 states and 1149620 transitions.
[2022-12-14 15:49:07,193 INFO  L78                 Accepts]: Start accepts. Automaton has 972483 states and 1149620 transitions. Word has length 10135
[2022-12-14 15:49:07,194 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:49:07,194 INFO  L495      AbstractCegarLoop]: Abstraction has 972483 states and 1149620 transitions.
[2022-12-14 15:49:07,196 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3378.3333333333335) internal successors, (10135), 2 states have internal predecessors, (10135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:49:07,196 INFO  L276                IsEmpty]: Start isEmpty. Operand 972483 states and 1149620 transitions.
[2022-12-14 15:49:09,086 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10226
[2022-12-14 15:49:09,086 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:49:09,088 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-12-14 15:49:09,088 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2022-12-14 15:49:09,088 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:49:09,088 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:49:09,089 INFO  L85        PathProgramCache]: Analyzing trace with hash -1025210675, now seen corresponding path program 1 times
[2022-12-14 15:49:09,089 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:49:09,089 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379573463]
[2022-12-14 15:49:09,090 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:49:09,090 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:49:10,200 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:49:29,376 INFO  L134       CoverageAnalysis]: Checked inductivity of 139 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 15:49:29,376 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:49:29,376 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379573463]
[2022-12-14 15:49:29,376 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379573463] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:49:29,376 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:49:29,377 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:49:29,377 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255835325]
[2022-12-14 15:49:29,377 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:49:29,380 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:49:29,381 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:49:29,384 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:49:29,384 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:49:29,386 INFO  L87              Difference]: Start difference. First operand 972483 states and 1149620 transitions. Second operand  has 3 states, 3 states have (on average 3408.3333333333335) internal successors, (10225), 2 states have internal predecessors, (10225), 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)
[2022-12-14 15:50:07,078 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:50:07,078 INFO  L93              Difference]: Finished difference Result 2917445 states and 3448857 transitions.
[2022-12-14 15:50:07,079 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:50:07,081 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3408.3333333333335) internal successors, (10225), 2 states have internal predecessors, (10225), 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 10225
[2022-12-14 15:50:07,081 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:50:09,583 INFO  L225             Difference]: With dead ends: 2917445
[2022-12-14 15:50:09,583 INFO  L226             Difference]: Without dead ends: 1944963
[2022-12-14 15:50:09,901 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
[2022-12-14 15:50:09,901 INFO  L413           NwaCegarLoop]: 6559 mSDtfsCounter, 12213 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 30594 mSolverCounterSat, 10501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12213 SdHoareTripleChecker+Valid, 6607 SdHoareTripleChecker+Invalid, 41095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10501 IncrementalHoareTripleChecker+Valid, 30594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.7s IncrementalHoareTripleChecker+Time
[2022-12-14 15:50:09,902 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12213 Valid, 6607 Invalid, 41095 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10501 Valid, 30594 Invalid, 0 Unknown, 0 Unchecked, 29.7s Time]
[2022-12-14 15:50:11,276 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1944963 states.
[2022-12-14 15:50:26,551 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944963 to 1944963.
[2022-12-14 15:50:27,280 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1944963 states, 1944962 states have (on average 1.1388232777812626) internal successors, (2214968), 1944962 states have internal predecessors, (2214968), 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)
[2022-12-14 15:50:30,486 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1944963 states to 1944963 states and 2214968 transitions.
[2022-12-14 15:50:30,486 INFO  L78                 Accepts]: Start accepts. Automaton has 1944963 states and 2214968 transitions. Word has length 10225
[2022-12-14 15:50:30,486 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:50:30,487 INFO  L495      AbstractCegarLoop]: Abstraction has 1944963 states and 2214968 transitions.
[2022-12-14 15:50:30,488 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3408.3333333333335) internal successors, (10225), 2 states have internal predecessors, (10225), 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)
[2022-12-14 15:50:30,488 INFO  L276                IsEmpty]: Start isEmpty. Operand 1944963 states and 2214968 transitions.
[2022-12-14 15:50:33,510 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10422
[2022-12-14 15:50:33,511 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:50:33,513 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2022-12-14 15:50:33,513 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2022-12-14 15:50:33,513 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:50:33,513 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:50:33,514 INFO  L85        PathProgramCache]: Analyzing trace with hash 1547741268, now seen corresponding path program 1 times
[2022-12-14 15:50:33,514 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:50:33,514 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571467996]
[2022-12-14 15:50:33,515 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:50:33,515 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:50:34,646 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:50:57,616 INFO  L134       CoverageAnalysis]: Checked inductivity of 383 backedges. 333 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked.
[2022-12-14 15:50:57,616 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:50:57,617 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571467996]
[2022-12-14 15:50:57,617 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571467996] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:50:57,617 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:50:57,619 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:50:57,619 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145878581]
[2022-12-14 15:50:57,619 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:50:57,623 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:50:57,623 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:50:57,627 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:50:57,627 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:50:57,629 INFO  L87              Difference]: Start difference. First operand 1944963 states and 2214968 transitions. Second operand  has 3 states, 3 states have (on average 3457.3333333333335) internal successors, (10372), 2 states have internal predecessors, (10372), 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)