./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-programs/Problem101_label23.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 2329fc70
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a21ad206-aa55-4a6d-a908-b8ba17df7266/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a21ad206-aa55-4a6d-a908-b8ba17df7266/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_a21ad206-aa55-4a6d-a908-b8ba17df7266/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a21ad206-aa55-4a6d-a908-b8ba17df7266/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-programs/Problem101_label23.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a21ad206-aa55-4a6d-a908-b8ba17df7266/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_a21ad206-aa55-4a6d-a908-b8ba17df7266/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 c7046cfa4b2ec4fa3792b24e46845153f6a07e82a781b78430ee0a56239bbfb5
--- 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 15:01:50,197 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-12-14 15:01:50,199 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-12-14 15:01:50,218 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-12-14 15:01:50,219 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-12-14 15:01:50,220 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-12-14 15:01:50,221 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-12-14 15:01:50,223 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-12-14 15:01:50,224 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-12-14 15:01:50,225 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-12-14 15:01:50,226 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-12-14 15:01:50,228 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-12-14 15:01:50,228 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-12-14 15:01:50,229 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-12-14 15:01:50,230 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-12-14 15:01:50,231 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-12-14 15:01:50,232 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-12-14 15:01:50,233 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-12-14 15:01:50,235 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-12-14 15:01:50,236 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-12-14 15:01:50,238 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-12-14 15:01:50,239 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-12-14 15:01:50,240 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-12-14 15:01:50,241 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-12-14 15:01:50,245 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-12-14 15:01:50,245 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-12-14 15:01:50,245 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-12-14 15:01:50,246 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-12-14 15:01:50,247 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-12-14 15:01:50,247 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-12-14 15:01:50,248 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-12-14 15:01:50,248 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-12-14 15:01:50,249 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-12-14 15:01:50,250 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-12-14 15:01:50,251 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-12-14 15:01:50,251 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-12-14 15:01:50,252 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-12-14 15:01:50,252 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-12-14 15:01:50,252 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-12-14 15:01:50,253 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-12-14 15:01:50,254 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-12-14 15:01:50,255 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a21ad206-aa55-4a6d-a908-b8ba17df7266/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf
[2022-12-14 15:01:50,270 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-12-14 15:01:50,270 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-12-14 15:01:50,271 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-12-14 15:01:50,271 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-12-14 15:01:50,271 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-12-14 15:01:50,271 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-12-14 15:01:50,271 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2022-12-14 15:01:50,272 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2022-12-14 15:01:50,272 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2022-12-14 15:01:50,272 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2022-12-14 15:01:50,272 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2022-12-14 15:01:50,272 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2022-12-14 15:01:50,272 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2022-12-14 15:01:50,272 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2022-12-14 15:01:50,272 INFO  L138        SettingsManager]:  * Interval Domain=false
[2022-12-14 15:01:50,273 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2022-12-14 15:01:50,273 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2022-12-14 15:01:50,273 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2022-12-14 15:01:50,273 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-12-14 15:01:50,273 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-12-14 15:01:50,274 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-12-14 15:01:50,274 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-12-14 15:01:50,274 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-12-14 15:01:50,274 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-12-14 15:01:50,274 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-12-14 15:01:50,274 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-12-14 15:01:50,274 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-12-14 15:01:50,274 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-12-14 15:01:50,274 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-12-14 15:01:50,275 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-12-14 15:01:50,275 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-12-14 15:01:50,275 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-12-14 15:01:50,275 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-12-14 15:01:50,275 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-12-14 15:01:50,275 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2022-12-14 15:01:50,275 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-12-14 15:01:50,275 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-12-14 15:01:50,276 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2022-12-14 15:01:50,276 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-12-14 15:01:50,276 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-12-14 15:01:50,276 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-12-14 15:01:50,276 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_a21ad206-aa55-4a6d-a908-b8ba17df7266/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_a21ad206-aa55-4a6d-a908-b8ba17df7266/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 -> c7046cfa4b2ec4fa3792b24e46845153f6a07e82a781b78430ee0a56239bbfb5
[2022-12-14 15:01:50,438 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-12-14 15:01:50,459 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-12-14 15:01:50,461 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-12-14 15:01:50,462 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-12-14 15:01:50,463 INFO  L275        PluginConnector]: CDTParser initialized
[2022-12-14 15:01:50,464 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a21ad206-aa55-4a6d-a908-b8ba17df7266/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/eca-programs/Problem101_label23.c
[2022-12-14 15:01:53,068 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2022-12-14 15:01:54,101 INFO  L351              CDTParser]: Found 1 translation units.
[2022-12-14 15:01:54,101 INFO  L172              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a21ad206-aa55-4a6d-a908-b8ba17df7266/sv-benchmarks/c/eca-programs/Problem101_label23.c
[2022-12-14 15:01:54,255 INFO  L394              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a21ad206-aa55-4a6d-a908-b8ba17df7266/bin/utaipan-gh47qXpMRh/data/8348ec179/fac7555d287c4877bd39dc46d789d005/FLAG7bd9f3b65
[2022-12-14 15:01:54,266 INFO  L402              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a21ad206-aa55-4a6d-a908-b8ba17df7266/bin/utaipan-gh47qXpMRh/data/8348ec179/fac7555d287c4877bd39dc46d789d005
[2022-12-14 15:01:54,268 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-12-14 15:01:54,269 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-12-14 15:01:54,270 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-12-14 15:01:54,271 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-12-14 15:01:54,273 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-12-14 15:01:54,273 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:01:54" (1/1) ...
[2022-12-14 15:01:54,274 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d35c2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:54, skipping insertion in model container
[2022-12-14 15:01:54,274 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:01:54" (1/1) ...
[2022-12-14 15:01:54,279 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-12-14 15:01:54,880 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-12-14 15:02:04,520 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_a21ad206-aa55-4a6d-a908-b8ba17df7266/sv-benchmarks/c/eca-programs/Problem101_label23.c[2766456,2766469]
[2022-12-14 15:02:04,579 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-12-14 15:02:04,586 INFO  L203         MainTranslator]: Completed pre-run
[2022-12-14 15:02:10,446 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_a21ad206-aa55-4a6d-a908-b8ba17df7266/sv-benchmarks/c/eca-programs/Problem101_label23.c[2766456,2766469]
[2022-12-14 15:02:10,472 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-12-14 15:02:11,027 INFO  L208         MainTranslator]: Completed translation
[2022-12-14 15:02:11,028 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:02:11 WrapperNode
[2022-12-14 15:02:11,028 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-12-14 15:02:11,028 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-12-14 15:02:11,028 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-12-14 15:02:11,028 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-12-14 15:02:11,033 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:02:11" (1/1) ...
[2022-12-14 15:02:11,346 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:02:11" (1/1) ...
[2022-12-14 15:02:12,605 INFO  L138                Inliner]: procedures = 59, calls = 53, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 83780
[2022-12-14 15:02:12,605 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-12-14 15:02:12,606 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-12-14 15:02:12,606 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-12-14 15:02:12,606 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-12-14 15:02:12,615 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:02:11" (1/1) ...
[2022-12-14 15:02:12,615 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:02:11" (1/1) ...
[2022-12-14 15:02:12,839 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:02:11" (1/1) ...
[2022-12-14 15:02:12,839 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:02:11" (1/1) ...
[2022-12-14 15:02:13,287 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:02:11" (1/1) ...
[2022-12-14 15:02:13,387 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:02:11" (1/1) ...
[2022-12-14 15:02:13,504 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:02:11" (1/1) ...
[2022-12-14 15:02:13,646 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:02:11" (1/1) ...
[2022-12-14 15:02:13,919 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-12-14 15:02:13,919 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-12-14 15:02:13,919 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-12-14 15:02:13,920 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-12-14 15:02:13,920 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:02:11" (1/1) ...
[2022-12-14 15:02:13,926 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-12-14 15:02:13,934 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a21ad206-aa55-4a6d-a908-b8ba17df7266/bin/utaipan-gh47qXpMRh/z3
[2022-12-14 15:02:13,945 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a21ad206-aa55-4a6d-a908-b8ba17df7266/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-12-14 15:02:13,948 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a21ad206-aa55-4a6d-a908-b8ba17df7266/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-12-14 15:02:13,983 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-12-14 15:02:13,984 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-12-14 15:02:13,984 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-12-14 15:02:13,984 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-12-14 15:02:14,098 INFO  L235             CfgBuilder]: Building ICFG
[2022-12-14 15:02:14,099 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-12-14 15:02:45,791 INFO  L276             CfgBuilder]: Performing block encoding
[2022-12-14 15:02:46,538 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-12-14 15:02:46,538 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-12-14 15:02:46,546 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:02:46 BoogieIcfgContainer
[2022-12-14 15:02:46,547 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-12-14 15:02:46,548 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-12-14 15:02:46,548 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-12-14 15:02:46,550 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-12-14 15:02:46,551 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:01:54" (1/3) ...
[2022-12-14 15:02:46,551 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd3d6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:02:46, skipping insertion in model container
[2022-12-14 15:02:46,551 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:02:11" (2/3) ...
[2022-12-14 15:02:46,551 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd3d6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:02:46, skipping insertion in model container
[2022-12-14 15:02:46,551 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:02:46" (3/3) ...
[2022-12-14 15:02:46,552 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem101_label23.c
[2022-12-14 15:02:46,565 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-12-14 15:02:46,565 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-12-14 15:02:46,691 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-12-14 15:02:46,697 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;@183b2e94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-12-14 15:02:46,697 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-12-14 15:02:46,720 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 15:02:47,243 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10086
[2022-12-14 15:02:47,244 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:02:47,247 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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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:02:47,248 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:02:47,254 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:02:47,257 INFO  L85        PathProgramCache]: Analyzing trace with hash 424309113, now seen corresponding path program 1 times
[2022-12-14 15:02:47,264 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:02:47,264 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785862974]
[2022-12-14 15:02:47,267 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:02:47,267 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:02:49,079 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:03:20,340 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 15:03:20,340 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:03:20,340 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785862974]
[2022-12-14 15:03:20,341 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785862974] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:03:20,341 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:03:20,342 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:03:20,343 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121520382]
[2022-12-14 15:03:20,344 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:03:20,354 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:03:20,355 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:03:20,381 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:03:20,382 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:03:20,400 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 15:03:49,945 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:03:49,945 INFO  L93              Difference]: Finished difference Result 30401 states and 60647 transitions.
[2022-12-14 15:03:49,946 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:03:49,949 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 15:03:49,962 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:03:50,017 INFO  L225             Difference]: With dead ends: 30401
[2022-12-14 15:03:50,017 INFO  L226             Difference]: Without dead ends: 20263
[2022-12-14 15:03:50,029 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 15:03:50,031 INFO  L413           NwaCegarLoop]: 7699 mSDtfsCounter, 350 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 30990 mSolverCounterSat, 9502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 7749 SdHoareTripleChecker+Invalid, 40492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9502 IncrementalHoareTripleChecker+Valid, 30990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.0s IncrementalHoareTripleChecker+Time
[2022-12-14 15:03:50,034 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 7749 Invalid, 40492 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9502 Valid, 30990 Invalid, 0 Unknown, 0 Unchecked, 29.0s Time]
[2022-12-14 15:03:50,070 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20263 states.
[2022-12-14 15:03:50,340 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20263 to 20263.
[2022-12-14 15:03:50,370 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20263 states, 20262 states have (on average 1.6192379824301648) internal successors, (32809), 20262 states have internal predecessors, (32809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:03:50,406 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20263 states to 20263 states and 32809 transitions.
[2022-12-14 15:03:50,408 INFO  L78                 Accepts]: Start accepts. Automaton has 20263 states and 32809 transitions. Word has length 10085
[2022-12-14 15:03:50,418 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:03:50,419 INFO  L495      AbstractCegarLoop]: Abstraction has 20263 states and 32809 transitions.
[2022-12-14 15:03:50,421 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3361.6666666666665) internal successors, (10085), 2 states have internal predecessors, (10085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:03:50,421 INFO  L276                IsEmpty]: Start isEmpty. Operand 20263 states and 32809 transitions.
[2022-12-14 15:03:50,980 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10090
[2022-12-14 15:03:50,980 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:03:50,983 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-12-14 15:03:50,984 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-12-14 15:03:50,984 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:03:50,984 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:03:50,987 INFO  L85        PathProgramCache]: Analyzing trace with hash 1996059169, now seen corresponding path program 1 times
[2022-12-14 15:03:50,987 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:03:50,988 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423844113]
[2022-12-14 15:03:50,989 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:03:50,989 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:03:52,045 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:04:13,489 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 15:04:13,490 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:04:13,490 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423844113]
[2022-12-14 15:04:13,490 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423844113] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:04:13,490 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:04:13,491 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:04:13,491 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375111387]
[2022-12-14 15:04:13,491 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:04:13,496 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:04:13,496 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:04:13,501 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:04:13,501 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:04:13,505 INFO  L87              Difference]: Start difference. First operand 20263 states and 32809 transitions. Second operand  has 3 states, 3 states have (on average 3363.0) internal successors, (10089), 2 states have internal predecessors, (10089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:04:44,967 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:04:44,968 INFO  L93              Difference]: Finished difference Result 60785 states and 98424 transitions.
[2022-12-14 15:04:44,968 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:04:44,970 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3363.0) internal successors, (10089), 2 states have internal predecessors, (10089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10089
[2022-12-14 15:04:44,970 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:04:45,027 INFO  L225             Difference]: With dead ends: 60785
[2022-12-14 15:04:45,027 INFO  L226             Difference]: Without dead ends: 40523
[2022-12-14 15:04:45,040 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 15:04:45,041 INFO  L413           NwaCegarLoop]: 8835 mSDtfsCounter, 11077 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29849 mSolverCounterSat, 11743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11077 SdHoareTripleChecker+Valid, 8883 SdHoareTripleChecker+Invalid, 41592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11743 IncrementalHoareTripleChecker+Valid, 29849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.8s IncrementalHoareTripleChecker+Time
[2022-12-14 15:04:45,041 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11077 Valid, 8883 Invalid, 41592 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11743 Valid, 29849 Invalid, 0 Unknown, 0 Unchecked, 30.8s Time]
[2022-12-14 15:04:45,074 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40523 states.
[2022-12-14 15:04:45,423 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40523 to 40523.
[2022-12-14 15:04:45,455 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 40523 states, 40522 states have (on average 1.4731257094911405) internal successors, (59694), 40522 states have internal predecessors, (59694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:04:45,500 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40523 states to 40523 states and 59694 transitions.
[2022-12-14 15:04:45,500 INFO  L78                 Accepts]: Start accepts. Automaton has 40523 states and 59694 transitions. Word has length 10089
[2022-12-14 15:04:45,501 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:04:45,501 INFO  L495      AbstractCegarLoop]: Abstraction has 40523 states and 59694 transitions.
[2022-12-14 15:04:45,503 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3363.0) internal successors, (10089), 2 states have internal predecessors, (10089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:04:45,503 INFO  L276                IsEmpty]: Start isEmpty. Operand 40523 states and 59694 transitions.
[2022-12-14 15:04:46,132 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10093
[2022-12-14 15:04:46,133 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:04:46,135 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2022-12-14 15:04:46,136 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-12-14 15:04:46,136 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:04:46,136 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:04:46,138 INFO  L85        PathProgramCache]: Analyzing trace with hash -814101922, now seen corresponding path program 1 times
[2022-12-14 15:04:46,138 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:04:46,139 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105518124]
[2022-12-14 15:04:46,139 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:04:46,140 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:04:47,129 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:05:07,738 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 15:05:07,738 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:05:07,738 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105518124]
[2022-12-14 15:05:07,738 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105518124] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:05:07,738 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:05:07,739 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:05:07,739 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255687089]
[2022-12-14 15:05:07,739 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:05:07,743 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:05:07,744 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:05:07,748 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:05:07,748 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:05:07,750 INFO  L87              Difference]: Start difference. First operand 40523 states and 59694 transitions. Second operand  has 3 states, 3 states have (on average 3364.0) internal successors, (10092), 2 states have internal predecessors, (10092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:05:39,696 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:05:39,696 INFO  L93              Difference]: Finished difference Result 121565 states and 179079 transitions.
[2022-12-14 15:05:39,696 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:05:39,698 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3364.0) internal successors, (10092), 2 states have internal predecessors, (10092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10092
[2022-12-14 15:05:39,698 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:05:39,791 INFO  L225             Difference]: With dead ends: 121565
[2022-12-14 15:05:39,791 INFO  L226             Difference]: Without dead ends: 81043
[2022-12-14 15:05:39,816 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 15:05:39,817 INFO  L413           NwaCegarLoop]: 9444 mSDtfsCounter, 10558 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 31186 mSolverCounterSat, 10928 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10558 SdHoareTripleChecker+Valid, 9492 SdHoareTripleChecker+Invalid, 42114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10928 IncrementalHoareTripleChecker+Valid, 31186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.3s IncrementalHoareTripleChecker+Time
[2022-12-14 15:05:39,817 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10558 Valid, 9492 Invalid, 42114 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10928 Valid, 31186 Invalid, 0 Unknown, 0 Unchecked, 31.3s Time]
[2022-12-14 15:05:39,864 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 81043 states.
[2022-12-14 15:05:40,447 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 81043 to 81043.
[2022-12-14 15:05:40,502 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 81043 states, 81042 states have (on average 1.361491572271168) internal successors, (110338), 81042 states have internal predecessors, (110338), 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 15:05:40,588 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81043 states to 81043 states and 110338 transitions.
[2022-12-14 15:05:40,589 INFO  L78                 Accepts]: Start accepts. Automaton has 81043 states and 110338 transitions. Word has length 10092
[2022-12-14 15:05:40,589 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:05:40,590 INFO  L495      AbstractCegarLoop]: Abstraction has 81043 states and 110338 transitions.
[2022-12-14 15:05:40,591 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3364.0) internal successors, (10092), 2 states have internal predecessors, (10092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:05:40,591 INFO  L276                IsEmpty]: Start isEmpty. Operand 81043 states and 110338 transitions.
[2022-12-14 15:05:41,234 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10123
[2022-12-14 15:05:41,234 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:05:41,238 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:05:41,238 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-12-14 15:05:41,238 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:05:41,238 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:05:41,241 INFO  L85        PathProgramCache]: Analyzing trace with hash -756184109, now seen corresponding path program 1 times
[2022-12-14 15:05:41,241 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:05:41,241 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879442426]
[2022-12-14 15:05:41,242 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:05:41,242 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:05:42,313 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:06:06,529 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 15:06:06,530 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:06:06,530 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879442426]
[2022-12-14 15:06:06,530 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879442426] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:06:06,530 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:06:06,531 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:06:06,531 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850844793]
[2022-12-14 15:06:06,531 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:06:06,536 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:06:06,536 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:06:06,541 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:06:06,541 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:06:06,544 INFO  L87              Difference]: Start difference. First operand 81043 states and 110338 transitions. Second operand  has 3 states, 3 states have (on average 3374.0) internal successors, (10122), 2 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:06:39,206 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:06:39,207 INFO  L93              Difference]: Finished difference Result 243125 states and 331011 transitions.
[2022-12-14 15:06:39,207 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:06:39,209 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3374.0) internal successors, (10122), 2 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10122
[2022-12-14 15:06:39,209 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:06:39,383 INFO  L225             Difference]: With dead ends: 243125
[2022-12-14 15:06:39,384 INFO  L226             Difference]: Without dead ends: 162083
[2022-12-14 15:06:39,423 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 15:06:39,425 INFO  L413           NwaCegarLoop]: 6561 mSDtfsCounter, 13042 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 27546 mSolverCounterSat, 13030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13042 SdHoareTripleChecker+Valid, 6609 SdHoareTripleChecker+Invalid, 40576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13030 IncrementalHoareTripleChecker+Valid, 27546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.6s IncrementalHoareTripleChecker+Time
[2022-12-14 15:06:39,425 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [13042 Valid, 6609 Invalid, 40576 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13030 Valid, 27546 Invalid, 0 Unknown, 0 Unchecked, 31.6s Time]
[2022-12-14 15:06:39,548 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 162083 states.
[2022-12-14 15:06:40,676 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 162083 to 162083.
[2022-12-14 15:06:40,775 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 162083 states, 162082 states have (on average 1.2595476363815847) internal successors, (204150), 162082 states have internal predecessors, (204150), 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 15:06:40,940 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 162083 states to 162083 states and 204150 transitions.
[2022-12-14 15:06:40,940 INFO  L78                 Accepts]: Start accepts. Automaton has 162083 states and 204150 transitions. Word has length 10122
[2022-12-14 15:06:40,941 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:06:40,941 INFO  L495      AbstractCegarLoop]: Abstraction has 162083 states and 204150 transitions.
[2022-12-14 15:06:40,943 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3374.0) internal successors, (10122), 2 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:06:40,943 INFO  L276                IsEmpty]: Start isEmpty. Operand 162083 states and 204150 transitions.
[2022-12-14 15:06:41,767 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10130
[2022-12-14 15:06:41,767 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:06:41,770 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:06:41,770 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-12-14 15:06:41,770 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:06:41,770 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:06:41,772 INFO  L85        PathProgramCache]: Analyzing trace with hash -1864069827, now seen corresponding path program 1 times
[2022-12-14 15:06:41,772 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:06:41,772 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265547185]
[2022-12-14 15:06:41,773 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:06:41,773 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:06:43,101 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:07:03,817 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 15:07:03,817 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:07:03,817 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265547185]
[2022-12-14 15:07:03,818 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265547185] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:07:03,818 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:07:03,818 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:07:03,818 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993028719]
[2022-12-14 15:07:03,819 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:07:03,823 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:07:03,823 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:07:03,828 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:07:03,828 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:07:03,830 INFO  L87              Difference]: Start difference. First operand 162083 states and 204150 transitions. Second operand  has 3 states, 3 states have (on average 3376.3333333333335) internal successors, (10129), 2 states have internal predecessors, (10129), 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 15:07:36,655 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:07:36,655 INFO  L93              Difference]: Finished difference Result 486245 states and 612447 transitions.
[2022-12-14 15:07:36,655 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:07:36,656 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3376.3333333333335) internal successors, (10129), 2 states have internal predecessors, (10129), 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 10129
[2022-12-14 15:07:36,657 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:07:37,071 INFO  L225             Difference]: With dead ends: 486245
[2022-12-14 15:07:37,071 INFO  L226             Difference]: Without dead ends: 324163
[2022-12-14 15:07:37,143 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 15:07:37,144 INFO  L413           NwaCegarLoop]: 6017 mSDtfsCounter, 12768 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29088 mSolverCounterSat, 11670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12768 SdHoareTripleChecker+Valid, 6065 SdHoareTripleChecker+Invalid, 40758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11670 IncrementalHoareTripleChecker+Valid, 29088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time
[2022-12-14 15:07:37,144 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12768 Valid, 6065 Invalid, 40758 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11670 Valid, 29088 Invalid, 0 Unknown, 0 Unchecked, 31.2s Time]
[2022-12-14 15:07:37,354 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 324163 states.
[2022-12-14 15:07:39,648 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 324163 to 324163.
[2022-12-14 15:07:39,825 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 324163 states, 324162 states have (on average 1.1973396018040363) internal successors, (388132), 324162 states have internal predecessors, (388132), 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 15:07:40,166 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 324163 states to 324163 states and 388132 transitions.
[2022-12-14 15:07:40,166 INFO  L78                 Accepts]: Start accepts. Automaton has 324163 states and 388132 transitions. Word has length 10129
[2022-12-14 15:07:40,167 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:07:40,168 INFO  L495      AbstractCegarLoop]: Abstraction has 324163 states and 388132 transitions.
[2022-12-14 15:07:40,169 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3376.3333333333335) internal successors, (10129), 2 states have internal predecessors, (10129), 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 15:07:40,169 INFO  L276                IsEmpty]: Start isEmpty. Operand 324163 states and 388132 transitions.
[2022-12-14 15:07:41,375 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10273
[2022-12-14 15:07:41,375 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:07:41,378 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2022-12-14 15:07:41,378 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2022-12-14 15:07:41,378 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:07:41,378 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:07:41,380 INFO  L85        PathProgramCache]: Analyzing trace with hash -651694308, now seen corresponding path program 1 times
[2022-12-14 15:07:41,381 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:07:41,381 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753306828]
[2022-12-14 15:07:41,382 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:07:41,382 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:07:42,710 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:08:03,050 INFO  L134       CoverageAnalysis]: Checked inductivity of 186 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 15:08:03,050 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:08:03,050 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753306828]
[2022-12-14 15:08:03,050 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753306828] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:08:03,051 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:08:03,051 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:08:03,051 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198628881]
[2022-12-14 15:08:03,052 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:08:03,059 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:08:03,059 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:08:03,064 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:08:03,064 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:08:03,066 INFO  L87              Difference]: Start difference. First operand 324163 states and 388132 transitions. Second operand  has 3 states, 3 states have (on average 3424.0) internal successors, (10272), 2 states have internal predecessors, (10272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:08:34,638 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:08:34,638 INFO  L93              Difference]: Finished difference Result 972485 states and 1164393 transitions.
[2022-12-14 15:08:34,639 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:08:34,640 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3424.0) internal successors, (10272), 2 states have internal predecessors, (10272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10272
[2022-12-14 15:08:34,641 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:08:35,390 INFO  L225             Difference]: With dead ends: 972485
[2022-12-14 15:08:35,390 INFO  L226             Difference]: Without dead ends: 648323
[2022-12-14 15:08:35,521 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 15:08:35,521 INFO  L413           NwaCegarLoop]: 8996 mSDtfsCounter, 10690 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 31560 mSolverCounterSat, 10501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10690 SdHoareTripleChecker+Valid, 9044 SdHoareTripleChecker+Invalid, 42061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10501 IncrementalHoareTripleChecker+Valid, 31560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.0s IncrementalHoareTripleChecker+Time
[2022-12-14 15:08:35,522 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10690 Valid, 9044 Invalid, 42061 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10501 Valid, 31560 Invalid, 0 Unknown, 0 Unchecked, 29.0s Time]
[2022-12-14 15:08:35,901 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 648323 states.
[2022-12-14 15:08:40,578 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 648323 to 648323.
[2022-12-14 15:08:40,849 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 648323 states, 648322 states have (on average 1.150308025950068) internal successors, (745770), 648322 states have internal predecessors, (745770), 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 15:08:41,843 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 648323 states to 648323 states and 745770 transitions.
[2022-12-14 15:08:41,843 INFO  L78                 Accepts]: Start accepts. Automaton has 648323 states and 745770 transitions. Word has length 10272
[2022-12-14 15:08:41,843 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:08:41,843 INFO  L495      AbstractCegarLoop]: Abstraction has 648323 states and 745770 transitions.
[2022-12-14 15:08:41,845 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3424.0) internal successors, (10272), 2 states have internal predecessors, (10272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 15:08:41,845 INFO  L276                IsEmpty]: Start isEmpty. Operand 648323 states and 745770 transitions.
[2022-12-14 15:08:43,309 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10558
[2022-12-14 15:08:43,310 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:08:43,311 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:08:43,312 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2022-12-14 15:08:43,312 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:08:43,312 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:08:43,313 INFO  L85        PathProgramCache]: Analyzing trace with hash -810575566, now seen corresponding path program 1 times
[2022-12-14 15:08:43,314 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:08:43,314 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057079252]
[2022-12-14 15:08:43,314 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:08:43,315 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:08:44,401 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:09:06,707 INFO  L134       CoverageAnalysis]: Checked inductivity of 469 backedges. 469 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 15:09:06,707 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:09:06,707 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057079252]
[2022-12-14 15:09:06,708 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057079252] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:09:06,708 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:09:06,709 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:09:06,709 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664562041]
[2022-12-14 15:09:06,709 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:09:06,716 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:09:06,716 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:09:06,723 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:09:06,723 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:09:06,726 INFO  L87              Difference]: Start difference. First operand 648323 states and 745770 transitions. Second operand  has 3 states, 3 states have (on average 3519.0) internal successors, (10557), 2 states have internal predecessors, (10557), 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 15:09:39,750 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:09:39,751 INFO  L93              Difference]: Finished difference Result 1944965 states and 2237307 transitions.
[2022-12-14 15:09:39,751 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:09:39,753 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3519.0) internal successors, (10557), 2 states have internal predecessors, (10557), 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 10557
[2022-12-14 15:09:39,753 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:09:41,260 INFO  L225             Difference]: With dead ends: 1944965
[2022-12-14 15:09:41,260 INFO  L226             Difference]: Without dead ends: 1296643
[2022-12-14 15:09:41,484 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 15:09:41,485 INFO  L413           NwaCegarLoop]: 5999 mSDtfsCounter, 12063 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29744 mSolverCounterSat, 11034 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12063 SdHoareTripleChecker+Valid, 6047 SdHoareTripleChecker+Invalid, 40778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11034 IncrementalHoareTripleChecker+Valid, 29744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.2s IncrementalHoareTripleChecker+Time
[2022-12-14 15:09:41,485 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12063 Valid, 6047 Invalid, 40778 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11034 Valid, 29744 Invalid, 0 Unknown, 0 Unchecked, 28.2s Time]
[2022-12-14 15:09:42,529 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1296643 states.
[2022-12-14 15:09:52,116 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296643 to 1296643.
[2022-12-14 15:09:52,701 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1296643 states, 1296642 states have (on average 1.112012413603755) internal successors, (1441882), 1296642 states have internal predecessors, (1441882), 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 15:09:54,728 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1296643 states to 1296643 states and 1441882 transitions.
[2022-12-14 15:09:54,728 INFO  L78                 Accepts]: Start accepts. Automaton has 1296643 states and 1441882 transitions. Word has length 10557
[2022-12-14 15:09:54,729 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 15:09:54,729 INFO  L495      AbstractCegarLoop]: Abstraction has 1296643 states and 1441882 transitions.
[2022-12-14 15:09:54,731 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3519.0) internal successors, (10557), 2 states have internal predecessors, (10557), 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 15:09:54,731 INFO  L276                IsEmpty]: Start isEmpty. Operand 1296643 states and 1441882 transitions.
[2022-12-14 15:09:56,958 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10855
[2022-12-14 15:09:56,958 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 15:09:56,960 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2022-12-14 15:09:56,960 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2022-12-14 15:09:56,960 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 15:09:56,960 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 15:09:56,962 INFO  L85        PathProgramCache]: Analyzing trace with hash -1591615304, now seen corresponding path program 1 times
[2022-12-14 15:09:56,962 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 15:09:56,962 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732858909]
[2022-12-14 15:09:56,963 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 15:09:56,963 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 15:09:58,191 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 15:10:24,832 INFO  L134       CoverageAnalysis]: Checked inductivity of 765 backedges. 765 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 15:10:24,833 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 15:10:24,833 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732858909]
[2022-12-14 15:10:24,833 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732858909] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 15:10:24,833 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 15:10:24,834 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 15:10:24,834 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836066024]
[2022-12-14 15:10:24,834 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 15:10:24,838 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 15:10:24,838 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 15:10:24,842 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 15:10:24,842 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 15:10:24,844 INFO  L87              Difference]: Start difference. First operand 1296643 states and 1441882 transitions. Second operand  has 3 states, 3 states have (on average 3618.0) internal successors, (10854), 2 states have internal predecessors, (10854), 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 15:11:04,903 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 15:11:04,903 INFO  L93              Difference]: Finished difference Result 3859535 states and 4291965 transitions.
[2022-12-14 15:11:04,904 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 15:11:04,905 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3618.0) internal successors, (10854), 2 states have internal predecessors, (10854), 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 10854
[2022-12-14 15:11:04,906 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 15:11:08,481 INFO  L225             Difference]: With dead ends: 3859535
[2022-12-14 15:11:08,481 INFO  L226             Difference]: Without dead ends: 2562893
[2022-12-14 15:11:09,192 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 15:11:09,193 INFO  L413           NwaCegarLoop]: 5906 mSDtfsCounter, 9622 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 31675 mSolverCounterSat, 11564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9622 SdHoareTripleChecker+Valid, 5955 SdHoareTripleChecker+Invalid, 43239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11564 IncrementalHoareTripleChecker+Valid, 31675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time
[2022-12-14 15:11:09,194 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [9622 Valid, 5955 Invalid, 43239 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11564 Valid, 31675 Invalid, 0 Unknown, 0 Unchecked, 31.0s Time]
[2022-12-14 15:11:11,604 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2562893 states.