./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem07_label48.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 2329fc70
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a259a02-347e-4c30-a415-294a585b8ae3/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a259a02-347e-4c30-a415-294a585b8ae3/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_2a259a02-347e-4c30-a415-294a585b8ae3/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a259a02-347e-4c30-a415-294a585b8ae3/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem07_label48.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a259a02-347e-4c30-a415-294a585b8ae3/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_2a259a02-347e-4c30-a415-294a585b8ae3/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 5480b4d537852325e0b0acda3f8d624aa77fcd434ac8c6220530ec1f980a3ccc
--- 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 11:24:28,555 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-12-14 11:24:28,557 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-12-14 11:24:28,575 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-12-14 11:24:28,576 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-12-14 11:24:28,577 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-12-14 11:24:28,578 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-12-14 11:24:28,579 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-12-14 11:24:28,581 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-12-14 11:24:28,582 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-12-14 11:24:28,582 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-12-14 11:24:28,583 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-12-14 11:24:28,584 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-12-14 11:24:28,585 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-12-14 11:24:28,586 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-12-14 11:24:28,587 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-12-14 11:24:28,588 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-12-14 11:24:28,588 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-12-14 11:24:28,590 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-12-14 11:24:28,592 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-12-14 11:24:28,593 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-12-14 11:24:28,594 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-12-14 11:24:28,595 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-12-14 11:24:28,596 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-12-14 11:24:28,599 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-12-14 11:24:28,599 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-12-14 11:24:28,600 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-12-14 11:24:28,601 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-12-14 11:24:28,601 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-12-14 11:24:28,602 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-12-14 11:24:28,602 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-12-14 11:24:28,603 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-12-14 11:24:28,603 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-12-14 11:24:28,604 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-12-14 11:24:28,605 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-12-14 11:24:28,605 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-12-14 11:24:28,605 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-12-14 11:24:28,606 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-12-14 11:24:28,606 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-12-14 11:24:28,607 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-12-14 11:24:28,607 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-12-14 11:24:28,608 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a259a02-347e-4c30-a415-294a585b8ae3/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf
[2022-12-14 11:24:28,626 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-12-14 11:24:28,627 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-12-14 11:24:28,627 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-12-14 11:24:28,627 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-12-14 11:24:28,628 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-12-14 11:24:28,628 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-12-14 11:24:28,628 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2022-12-14 11:24:28,628 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2022-12-14 11:24:28,628 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2022-12-14 11:24:28,634 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2022-12-14 11:24:28,634 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2022-12-14 11:24:28,634 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2022-12-14 11:24:28,634 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2022-12-14 11:24:28,634 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2022-12-14 11:24:28,635 INFO  L138        SettingsManager]:  * Interval Domain=false
[2022-12-14 11:24:28,635 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2022-12-14 11:24:28,635 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2022-12-14 11:24:28,635 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2022-12-14 11:24:28,636 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-12-14 11:24:28,636 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-12-14 11:24:28,636 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-12-14 11:24:28,637 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-12-14 11:24:28,637 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-12-14 11:24:28,637 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-12-14 11:24:28,637 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-12-14 11:24:28,637 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-12-14 11:24:28,638 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-12-14 11:24:28,638 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-12-14 11:24:28,638 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-12-14 11:24:28,638 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-12-14 11:24:28,638 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-12-14 11:24:28,639 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-12-14 11:24:28,639 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-12-14 11:24:28,639 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-12-14 11:24:28,639 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2022-12-14 11:24:28,639 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-12-14 11:24:28,640 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-12-14 11:24:28,640 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2022-12-14 11:24:28,640 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-12-14 11:24:28,640 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-12-14 11:24:28,640 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-12-14 11:24:28,641 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a259a02-347e-4c30-a415-294a585b8ae3/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_2a259a02-347e-4c30-a415-294a585b8ae3/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 -> 5480b4d537852325e0b0acda3f8d624aa77fcd434ac8c6220530ec1f980a3ccc
[2022-12-14 11:24:28,854 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-12-14 11:24:28,873 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-12-14 11:24:28,875 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-12-14 11:24:28,876 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-12-14 11:24:28,877 INFO  L275        PluginConnector]: CDTParser initialized
[2022-12-14 11:24:28,878 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a259a02-347e-4c30-a415-294a585b8ae3/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/eca-rers2012/Problem07_label48.c
[2022-12-14 11:24:31,535 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2022-12-14 11:24:32,646 INFO  L351              CDTParser]: Found 1 translation units.
[2022-12-14 11:24:32,647 INFO  L172              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a259a02-347e-4c30-a415-294a585b8ae3/sv-benchmarks/c/eca-rers2012/Problem07_label48.c
[2022-12-14 11:24:32,803 INFO  L394              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a259a02-347e-4c30-a415-294a585b8ae3/bin/utaipan-gh47qXpMRh/data/0f1349cee/60ae0abe7dc5412096c4bbe6e52e4dbf/FLAGa6ff5603d
[2022-12-14 11:24:32,814 INFO  L402              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a259a02-347e-4c30-a415-294a585b8ae3/bin/utaipan-gh47qXpMRh/data/0f1349cee/60ae0abe7dc5412096c4bbe6e52e4dbf
[2022-12-14 11:24:32,816 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-12-14 11:24:32,818 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-12-14 11:24:32,819 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-12-14 11:24:32,819 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-12-14 11:24:32,822 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-12-14 11:24:32,823 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:24:32" (1/1) ...
[2022-12-14 11:24:32,824 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@674aa49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:24:32, skipping insertion in model container
[2022-12-14 11:24:32,824 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:24:32" (1/1) ...
[2022-12-14 11:24:32,829 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-12-14 11:24:33,394 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-12-14 11:24:42,922 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_2a259a02-347e-4c30-a415-294a585b8ae3/sv-benchmarks/c/eca-rers2012/Problem07_label48.c[2767282,2767295]
[2022-12-14 11:24:42,979 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-12-14 11:24:42,986 INFO  L203         MainTranslator]: Completed pre-run
[2022-12-14 11:24:49,245 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_2a259a02-347e-4c30-a415-294a585b8ae3/sv-benchmarks/c/eca-rers2012/Problem07_label48.c[2767282,2767295]
[2022-12-14 11:24:49,259 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-12-14 11:24:50,024 INFO  L208         MainTranslator]: Completed translation
[2022-12-14 11:24:50,024 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:24:50 WrapperNode
[2022-12-14 11:24:50,024 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-12-14 11:24:50,025 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-12-14 11:24:50,025 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-12-14 11:24:50,025 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-12-14 11:24:50,030 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:24:50" (1/1) ...
[2022-12-14 11:24:50,341 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:24:50" (1/1) ...
[2022-12-14 11:24:51,522 INFO  L138                Inliner]: procedures = 59, calls = 53, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 83773
[2022-12-14 11:24:51,522 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-12-14 11:24:51,523 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-12-14 11:24:51,523 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-12-14 11:24:51,523 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-12-14 11:24:51,531 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:24:50" (1/1) ...
[2022-12-14 11:24:51,531 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:24:50" (1/1) ...
[2022-12-14 11:24:51,798 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:24:50" (1/1) ...
[2022-12-14 11:24:51,799 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:24:50" (1/1) ...
[2022-12-14 11:24:52,503 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:24:50" (1/1) ...
[2022-12-14 11:24:52,626 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:24:50" (1/1) ...
[2022-12-14 11:24:52,761 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:24:50" (1/1) ...
[2022-12-14 11:24:52,824 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:24:50" (1/1) ...
[2022-12-14 11:24:53,096 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-12-14 11:24:53,097 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-12-14 11:24:53,097 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-12-14 11:24:53,097 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-12-14 11:24:53,098 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:24:50" (1/1) ...
[2022-12-14 11:24:53,103 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-12-14 11:24:53,111 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a259a02-347e-4c30-a415-294a585b8ae3/bin/utaipan-gh47qXpMRh/z3
[2022-12-14 11:24:53,121 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a259a02-347e-4c30-a415-294a585b8ae3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-12-14 11:24:53,123 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a259a02-347e-4c30-a415-294a585b8ae3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-12-14 11:24:53,155 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-12-14 11:24:53,155 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-12-14 11:24:53,155 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-12-14 11:24:53,155 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-12-14 11:24:53,348 INFO  L235             CfgBuilder]: Building ICFG
[2022-12-14 11:24:53,349 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-12-14 11:25:23,920 INFO  L276             CfgBuilder]: Performing block encoding
[2022-12-14 11:25:24,598 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-12-14 11:25:24,599 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-12-14 11:25:24,606 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:25:24 BoogieIcfgContainer
[2022-12-14 11:25:24,606 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-12-14 11:25:24,608 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-12-14 11:25:24,608 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-12-14 11:25:24,610 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-12-14 11:25:24,610 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:24:32" (1/3) ...
[2022-12-14 11:25:24,611 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a12a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:25:24, skipping insertion in model container
[2022-12-14 11:25:24,611 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:24:50" (2/3) ...
[2022-12-14 11:25:24,611 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a12a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:25:24, skipping insertion in model container
[2022-12-14 11:25:24,611 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:25:24" (3/3) ...
[2022-12-14 11:25:24,612 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem07_label48.c
[2022-12-14 11:25:24,625 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-12-14 11:25:24,625 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-12-14 11:25:24,749 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-12-14 11:25:24,753 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;@4981c63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-12-14 11:25:24,754 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-12-14 11:25:24,792 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 11:25:25,261 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10086
[2022-12-14 11:25:25,262 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 11:25:25,265 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 11:25:25,266 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 11:25:25,271 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 11:25:25,280 INFO  L85        PathProgramCache]: Analyzing trace with hash 64759329, now seen corresponding path program 1 times
[2022-12-14 11:25:25,286 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 11:25:25,287 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097849505]
[2022-12-14 11:25:25,289 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 11:25:25,289 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 11:25:27,247 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 11:25:58,507 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 11:25:58,507 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 11:25:58,508 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097849505]
[2022-12-14 11:25:58,508 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097849505] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 11:25:58,508 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 11:25:58,509 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 11:25:58,510 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368930938]
[2022-12-14 11:25:58,511 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 11:25:58,521 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 11:25:58,521 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 11:25:58,552 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 11:25:58,552 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 11:25:58,580 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 11:26:26,288 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 11:26:26,288 INFO  L93              Difference]: Finished difference Result 30401 states and 60647 transitions.
[2022-12-14 11:26:26,289 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 11:26:26,293 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 11:26:26,304 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 11:26:26,362 INFO  L225             Difference]: With dead ends: 30401
[2022-12-14 11:26:26,362 INFO  L226             Difference]: Without dead ends: 20263
[2022-12-14 11:26:26,374 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 11:26:26,376 INFO  L413           NwaCegarLoop]: 5063 mSDtfsCounter, 1926 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 33392 mSolverCounterSat, 7007 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1926 SdHoareTripleChecker+Valid, 5113 SdHoareTripleChecker+Invalid, 40399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7007 IncrementalHoareTripleChecker+Valid, 33392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.2s IncrementalHoareTripleChecker+Time
[2022-12-14 11:26:26,377 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1926 Valid, 5113 Invalid, 40399 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7007 Valid, 33392 Invalid, 0 Unknown, 0 Unchecked, 27.2s Time]
[2022-12-14 11:26:26,406 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20263 states.
[2022-12-14 11:26:26,747 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20263 to 20263.
[2022-12-14 11:26:26,774 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20263 states, 20262 states have (on average 1.7489389004046985) internal successors, (35437), 20262 states have internal predecessors, (35437), 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 11:26:26,805 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20263 states to 20263 states and 35437 transitions.
[2022-12-14 11:26:26,806 INFO  L78                 Accepts]: Start accepts. Automaton has 20263 states and 35437 transitions. Word has length 10085
[2022-12-14 11:26:26,815 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 11:26:26,816 INFO  L495      AbstractCegarLoop]: Abstraction has 20263 states and 35437 transitions.
[2022-12-14 11:26:26,818 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 11:26:26,818 INFO  L276                IsEmpty]: Start isEmpty. Operand 20263 states and 35437 transitions.
[2022-12-14 11:26:27,388 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10090
[2022-12-14 11:26:27,388 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 11:26:27,390 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 11:26:27,391 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-12-14 11:26:27,391 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 11:26:27,391 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 11:26:27,394 INFO  L85        PathProgramCache]: Analyzing trace with hash 482746441, now seen corresponding path program 1 times
[2022-12-14 11:26:27,394 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 11:26:27,395 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579461801]
[2022-12-14 11:26:27,396 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 11:26:27,396 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 11:26:28,427 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 11:26:47,449 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 11:26:47,449 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 11:26:47,449 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579461801]
[2022-12-14 11:26:47,449 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579461801] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 11:26:47,450 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 11:26:47,450 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 11:26:47,451 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914572934]
[2022-12-14 11:26:47,451 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 11:26:47,458 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 11:26:47,458 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 11:26:47,465 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 11:26:47,465 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 11:26:47,468 INFO  L87              Difference]: Start difference. First operand 20263 states and 35437 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 11:27:17,276 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 11:27:17,276 INFO  L93              Difference]: Finished difference Result 60785 states and 106308 transitions.
[2022-12-14 11:27:17,276 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 11:27:17,278 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 11:27:17,279 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 11:27:17,331 INFO  L225             Difference]: With dead ends: 60785
[2022-12-14 11:27:17,331 INFO  L226             Difference]: Without dead ends: 40523
[2022-12-14 11:27:17,346 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 11:27:17,347 INFO  L413           NwaCegarLoop]: 4832 mSDtfsCounter, 13805 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 28583 mSolverCounterSat, 11758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13805 SdHoareTripleChecker+Valid, 4880 SdHoareTripleChecker+Invalid, 40341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11758 IncrementalHoareTripleChecker+Valid, 28583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time
[2022-12-14 11:27:17,347 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [13805 Valid, 4880 Invalid, 40341 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11758 Valid, 28583 Invalid, 0 Unknown, 0 Unchecked, 29.2s Time]
[2022-12-14 11:27:17,373 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40523 states.
[2022-12-14 11:27:17,680 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40523 to 40523.
[2022-12-14 11:27:17,710 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 40523 states, 40522 states have (on average 1.5715907408321406) internal successors, (63684), 40522 states have internal predecessors, (63684), 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 11:27:17,753 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40523 states to 40523 states and 63684 transitions.
[2022-12-14 11:27:17,753 INFO  L78                 Accepts]: Start accepts. Automaton has 40523 states and 63684 transitions. Word has length 10089
[2022-12-14 11:27:17,754 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 11:27:17,754 INFO  L495      AbstractCegarLoop]: Abstraction has 40523 states and 63684 transitions.
[2022-12-14 11:27:17,755 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 11:27:17,755 INFO  L276                IsEmpty]: Start isEmpty. Operand 40523 states and 63684 transitions.
[2022-12-14 11:27:18,340 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10091
[2022-12-14 11:27:18,340 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 11:27:18,343 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2022-12-14 11:27:18,343 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-12-14 11:27:18,343 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 11:27:18,344 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 11:27:18,346 INFO  L85        PathProgramCache]: Analyzing trace with hash -823613455, now seen corresponding path program 1 times
[2022-12-14 11:27:18,346 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 11:27:18,346 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416066545]
[2022-12-14 11:27:18,347 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 11:27:18,347 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 11:27:19,382 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 11:27:39,115 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 11:27:39,115 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 11:27:39,115 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416066545]
[2022-12-14 11:27:39,115 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416066545] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 11:27:39,115 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 11:27:39,116 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 11:27:39,116 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779769722]
[2022-12-14 11:27:39,116 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 11:27:39,121 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 11:27:39,121 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 11:27:39,125 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 11:27:39,126 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 11:27:39,128 INFO  L87              Difference]: Start difference. First operand 40523 states and 63684 transitions. Second operand  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 11:28:06,611 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 11:28:06,611 INFO  L93              Difference]: Finished difference Result 121565 states and 191049 transitions.
[2022-12-14 11:28:06,611 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 11:28:06,612 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10090
[2022-12-14 11:28:06,613 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 11:28:06,679 INFO  L225             Difference]: With dead ends: 121565
[2022-12-14 11:28:06,679 INFO  L226             Difference]: Without dead ends: 81043
[2022-12-14 11:28:06,704 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 11:28:06,705 INFO  L413           NwaCegarLoop]: 6211 mSDtfsCounter, 12768 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29243 mSolverCounterSat, 11677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12768 SdHoareTripleChecker+Valid, 6259 SdHoareTripleChecker+Invalid, 40920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11677 IncrementalHoareTripleChecker+Valid, 29243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.8s IncrementalHoareTripleChecker+Time
[2022-12-14 11:28:06,705 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12768 Valid, 6259 Invalid, 40920 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11677 Valid, 29243 Invalid, 0 Unknown, 0 Unchecked, 26.8s Time]
[2022-12-14 11:28:06,751 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 81043 states.
[2022-12-14 11:28:07,266 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 81043 to 81043.
[2022-12-14 11:28:07,320 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 81043 states, 81042 states have (on average 1.4399693985834505) internal successors, (116698), 81042 states have internal predecessors, (116698), 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 11:28:07,405 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81043 states to 81043 states and 116698 transitions.
[2022-12-14 11:28:07,405 INFO  L78                 Accepts]: Start accepts. Automaton has 81043 states and 116698 transitions. Word has length 10090
[2022-12-14 11:28:07,406 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 11:28:07,406 INFO  L495      AbstractCegarLoop]: Abstraction has 81043 states and 116698 transitions.
[2022-12-14 11:28:07,407 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3363.3333333333335) internal successors, (10090), 2 states have internal predecessors, (10090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 11:28:07,407 INFO  L276                IsEmpty]: Start isEmpty. Operand 81043 states and 116698 transitions.
[2022-12-14 11:28:08,037 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10097
[2022-12-14 11:28:08,037 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 11:28:08,040 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:28:08,040 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-12-14 11:28:08,040 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 11:28:08,040 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 11:28:08,042 INFO  L85        PathProgramCache]: Analyzing trace with hash 439850082, now seen corresponding path program 1 times
[2022-12-14 11:28:08,042 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 11:28:08,042 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705776588]
[2022-12-14 11:28:08,043 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 11:28:08,043 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 11:28:09,101 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 11:28:32,701 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 11:28:32,701 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 11:28:32,701 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705776588]
[2022-12-14 11:28:32,702 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705776588] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 11:28:32,702 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 11:28:32,703 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 11:28:32,703 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588797265]
[2022-12-14 11:28:32,703 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 11:28:32,707 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 11:28:32,707 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 11:28:32,781 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 11:28:32,781 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 11:28:32,783 INFO  L87              Difference]: Start difference. First operand 81043 states and 116698 transitions. Second operand  has 3 states, 3 states have (on average 3365.3333333333335) internal successors, (10096), 2 states have internal predecessors, (10096), 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 11:29:05,948 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 11:29:05,948 INFO  L93              Difference]: Finished difference Result 243125 states and 350091 transitions.
[2022-12-14 11:29:05,949 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 11:29:05,950 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3365.3333333333335) internal successors, (10096), 2 states have internal predecessors, (10096), 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 10096
[2022-12-14 11:29:05,950 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 11:29:06,099 INFO  L225             Difference]: With dead ends: 243125
[2022-12-14 11:29:06,099 INFO  L226             Difference]: Without dead ends: 162083
[2022-12-14 11:29:06,134 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 11:29:06,135 INFO  L413           NwaCegarLoop]: 6165 mSDtfsCounter, 13340 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 27416 mSolverCounterSat, 13030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13340 SdHoareTripleChecker+Valid, 6213 SdHoareTripleChecker+Invalid, 40446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13030 IncrementalHoareTripleChecker+Valid, 27416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.1s IncrementalHoareTripleChecker+Time
[2022-12-14 11:29:06,135 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [13340 Valid, 6213 Invalid, 40446 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13030 Valid, 27416 Invalid, 0 Unknown, 0 Unchecked, 32.1s Time]
[2022-12-14 11:29:06,220 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 162083 states.
[2022-12-14 11:29:07,219 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 162083 to 162083.
[2022-12-14 11:29:07,322 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 162083 states, 162082 states have (on average 1.3156303599412642) internal successors, (213240), 162082 states have internal predecessors, (213240), 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 11:29:07,492 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 162083 states to 162083 states and 213240 transitions.
[2022-12-14 11:29:07,492 INFO  L78                 Accepts]: Start accepts. Automaton has 162083 states and 213240 transitions. Word has length 10096
[2022-12-14 11:29:07,493 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 11:29:07,493 INFO  L495      AbstractCegarLoop]: Abstraction has 162083 states and 213240 transitions.
[2022-12-14 11:29:07,495 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3365.3333333333335) internal successors, (10096), 2 states have internal predecessors, (10096), 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 11:29:07,495 INFO  L276                IsEmpty]: Start isEmpty. Operand 162083 states and 213240 transitions.
[2022-12-14 11:29:08,426 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10107
[2022-12-14 11:29:08,427 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 11:29:08,430 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-12-14 11:29:08,430 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-12-14 11:29:08,430 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 11:29:08,431 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 11:29:08,434 INFO  L85        PathProgramCache]: Analyzing trace with hash -820050999, now seen corresponding path program 1 times
[2022-12-14 11:29:08,434 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 11:29:08,434 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209285422]
[2022-12-14 11:29:08,435 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 11:29:08,435 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 11:29:09,615 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 11:29:40,496 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 11:29:40,497 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 11:29:40,497 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209285422]
[2022-12-14 11:29:40,497 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209285422] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 11:29:40,497 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 11:29:40,498 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 11:29:40,498 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740853535]
[2022-12-14 11:29:40,498 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 11:29:40,502 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 11:29:40,502 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 11:29:40,507 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 11:29:40,507 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 11:29:40,509 INFO  L87              Difference]: Start difference. First operand 162083 states and 213240 transitions. Second operand  has 3 states, 3 states have (on average 3368.6666666666665) internal successors, (10106), 2 states have internal predecessors, (10106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 11:30:09,227 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 11:30:09,227 INFO  L93              Difference]: Finished difference Result 405205 states and 525175 transitions.
[2022-12-14 11:30:09,227 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 11:30:09,229 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3368.6666666666665) internal successors, (10106), 2 states have internal predecessors, (10106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10106
[2022-12-14 11:30:09,229 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 11:30:09,600 INFO  L225             Difference]: With dead ends: 405205
[2022-12-14 11:30:09,601 INFO  L226             Difference]: Without dead ends: 243123
[2022-12-14 11:30:09,667 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 11:30:09,668 INFO  L413           NwaCegarLoop]: 8004 mSDtfsCounter, 11068 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 28363 mSolverCounterSat, 7491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11068 SdHoareTripleChecker+Valid, 8052 SdHoareTripleChecker+Invalid, 35854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7491 IncrementalHoareTripleChecker+Valid, 28363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.2s IncrementalHoareTripleChecker+Time
[2022-12-14 11:30:09,668 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11068 Valid, 8052 Invalid, 35854 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7491 Valid, 28363 Invalid, 0 Unknown, 0 Unchecked, 27.2s Time]
[2022-12-14 11:30:09,807 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 243123 states.
[2022-12-14 11:30:11,559 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 243123 to 243123.
[2022-12-14 11:30:11,628 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 243123 states, 243122 states have (on average 1.2453336185125163) internal successors, (302768), 243122 states have internal predecessors, (302768), 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 11:30:12,018 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 243123 states to 243123 states and 302768 transitions.
[2022-12-14 11:30:12,018 INFO  L78                 Accepts]: Start accepts. Automaton has 243123 states and 302768 transitions. Word has length 10106
[2022-12-14 11:30:12,020 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 11:30:12,020 INFO  L495      AbstractCegarLoop]: Abstraction has 243123 states and 302768 transitions.
[2022-12-14 11:30:12,021 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3368.6666666666665) internal successors, (10106), 2 states have internal predecessors, (10106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 11:30:12,021 INFO  L276                IsEmpty]: Start isEmpty. Operand 243123 states and 302768 transitions.
[2022-12-14 11:30:12,817 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10136
[2022-12-14 11:30:12,817 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 11:30:12,819 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2022-12-14 11:30:12,819 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2022-12-14 11:30:12,820 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 11:30:12,820 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 11:30:12,822 INFO  L85        PathProgramCache]: Analyzing trace with hash -239684938, now seen corresponding path program 1 times
[2022-12-14 11:30:12,822 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 11:30:12,822 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832591427]
[2022-12-14 11:30:12,822 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 11:30:12,823 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 11:30:13,820 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 11:30:35,436 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-12-14 11:30:35,436 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 11:30:35,436 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832591427]
[2022-12-14 11:30:35,437 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832591427] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 11:30:35,437 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 11:30:35,437 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 11:30:35,437 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362161006]
[2022-12-14 11:30:35,438 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 11:30:35,442 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 11:30:35,442 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 11:30:35,446 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 11:30:35,447 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 11:30:35,449 INFO  L87              Difference]: Start difference. First operand 243123 states and 302768 transitions. Second operand  has 3 states, 3 states have (on average 3378.3333333333335) internal successors, (10135), 2 states have internal predecessors, (10135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 11:31:07,813 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 11:31:07,813 INFO  L93              Difference]: Finished difference Result 729365 states and 908301 transitions.
[2022-12-14 11:31:07,814 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 11:31:07,815 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3378.3333333333335) internal successors, (10135), 2 states have internal predecessors, (10135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10135
[2022-12-14 11:31:07,815 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 11:31:08,400 INFO  L225             Difference]: With dead ends: 729365
[2022-12-14 11:31:08,400 INFO  L226             Difference]: Without dead ends: 486243
[2022-12-14 11:31:08,494 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 11:31:08,495 INFO  L413           NwaCegarLoop]: 7235 mSDtfsCounter, 11769 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 30385 mSolverCounterSat, 11086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11769 SdHoareTripleChecker+Valid, 7284 SdHoareTripleChecker+Invalid, 41471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11086 IncrementalHoareTripleChecker+Valid, 30385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time
[2022-12-14 11:31:08,495 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11769 Valid, 7284 Invalid, 41471 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11086 Valid, 30385 Invalid, 0 Unknown, 0 Unchecked, 30.2s Time]
[2022-12-14 11:31:08,736 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 486243 states.
[2022-12-14 11:31:12,377 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 486243 to 486243.
[2022-12-14 11:31:12,575 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 486243 states, 486242 states have (on average 1.188029828768391) internal successors, (577670), 486242 states have internal predecessors, (577670), 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 11:31:13,251 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 486243 states to 486243 states and 577670 transitions.
[2022-12-14 11:31:13,252 INFO  L78                 Accepts]: Start accepts. Automaton has 486243 states and 577670 transitions. Word has length 10135
[2022-12-14 11:31:13,252 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 11:31:13,252 INFO  L495      AbstractCegarLoop]: Abstraction has 486243 states and 577670 transitions.
[2022-12-14 11:31:13,254 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3378.3333333333335) internal successors, (10135), 2 states have internal predecessors, (10135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-12-14 11:31:13,254 INFO  L276                IsEmpty]: Start isEmpty. Operand 486243 states and 577670 transitions.
[2022-12-14 11:31:14,485 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10273
[2022-12-14 11:31:14,485 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 11:31:14,487 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-12-14 11:31:14,487 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2022-12-14 11:31:14,487 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 11:31:14,487 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 11:31:14,488 INFO  L85        PathProgramCache]: Analyzing trace with hash -339532118, now seen corresponding path program 1 times
[2022-12-14 11:31:14,489 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 11:31:14,489 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855149347]
[2022-12-14 11:31:14,490 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 11:31:14,490 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 11:31:15,610 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 11:31:38,355 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 11:31:38,356 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 11:31:38,356 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855149347]
[2022-12-14 11:31:38,356 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855149347] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 11:31:38,356 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 11:31:38,357 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-12-14 11:31:38,357 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005024099]
[2022-12-14 11:31:38,357 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 11:31:38,362 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-12-14 11:31:38,362 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 11:31:38,368 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-12-14 11:31:38,368 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-12-14 11:31:38,370 INFO  L87              Difference]: Start difference. First operand 486243 states and 577670 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 11:32:11,113 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 11:32:11,113 INFO  L93              Difference]: Finished difference Result 1458725 states and 1733007 transitions.
[2022-12-14 11:32:11,113 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-12-14 11:32:11,115 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 11:32:11,115 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 11:32:12,231 INFO  L225             Difference]: With dead ends: 1458725
[2022-12-14 11:32:12,231 INFO  L226             Difference]: Without dead ends: 972483
[2022-12-14 11:32:12,515 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 11:32:12,516 INFO  L413           NwaCegarLoop]: 6464 mSDtfsCounter, 12221 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 30554 mSolverCounterSat, 10501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12221 SdHoareTripleChecker+Valid, 6512 SdHoareTripleChecker+Invalid, 41055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10501 IncrementalHoareTripleChecker+Valid, 30554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.8s IncrementalHoareTripleChecker+Time
[2022-12-14 11:32:12,516 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12221 Valid, 6512 Invalid, 41055 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10501 Valid, 30554 Invalid, 0 Unknown, 0 Unchecked, 28.8s Time]
[2022-12-14 11:32:13,050 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 972483 states.
[2022-12-14 11:32:20,469 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 972483 to 972483.
[2022-12-14 11:32:20,809 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 972483 states, 972482 states have (on average 1.1431820846041367) internal successors, (1111724), 972482 states have internal predecessors, (1111724), 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 11:32:22,737 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 972483 states to 972483 states and 1111724 transitions.
[2022-12-14 11:32:22,738 INFO  L78                 Accepts]: Start accepts. Automaton has 972483 states and 1111724 transitions. Word has length 10272
[2022-12-14 11:32:22,738 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-12-14 11:32:22,738 INFO  L495      AbstractCegarLoop]: Abstraction has 972483 states and 1111724 transitions.
[2022-12-14 11:32:22,739 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 11:32:22,740 INFO  L276                IsEmpty]: Start isEmpty. Operand 972483 states and 1111724 transitions.
[2022-12-14 11:32:24,547 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10495
[2022-12-14 11:32:24,547 INFO  L187           NwaCegarLoop]: Found error trace
[2022-12-14 11:32:24,549 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2022-12-14 11:32:24,549 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2022-12-14 11:32:24,549 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-12-14 11:32:24,549 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-12-14 11:32:24,551 INFO  L85        PathProgramCache]: Analyzing trace with hash 1129990476, now seen corresponding path program 1 times
[2022-12-14 11:32:24,551 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-12-14 11:32:24,551 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376777017]
[2022-12-14 11:32:24,552 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-12-14 11:32:24,552 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-12-14 11:32:25,764 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-12-14 11:33:19,917 INFO  L134       CoverageAnalysis]: Checked inductivity of 578 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked.
[2022-12-14 11:33:19,917 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-12-14 11:33:19,917 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376777017]
[2022-12-14 11:33:19,917 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376777017] provided 1 perfect and 0 imperfect interpolant sequences
[2022-12-14 11:33:19,917 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-12-14 11:33:19,918 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-12-14 11:33:19,918 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305279686]
[2022-12-14 11:33:19,918 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-12-14 11:33:19,922 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-12-14 11:33:19,923 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-12-14 11:33:19,927 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-12-14 11:33:19,927 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2022-12-14 11:33:19,929 INFO  L87              Difference]: Start difference. First operand 972483 states and 1111724 transitions. Second operand  has 6 states, 6 states have (on average 1728.8333333333333) internal successors, (10373), 5 states have internal predecessors, (10373), 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 11:34:14,163 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-12-14 11:34:14,163 INFO  L93              Difference]: Finished difference Result 2943199 states and 3363939 transitions.
[2022-12-14 11:34:14,163 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-12-14 11:34:14,165 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1728.8333333333333) internal successors, (10373), 5 states have internal predecessors, (10373), 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 10494
[2022-12-14 11:34:14,165 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-12-14 11:34:17,008 INFO  L225             Difference]: With dead ends: 2943199
[2022-12-14 11:34:17,009 INFO  L226             Difference]: Without dead ends: 1970717
[2022-12-14 11:34:17,469 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56
[2022-12-14 11:34:17,470 INFO  L413           NwaCegarLoop]: 9614 mSDtfsCounter, 40720 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 56579 mSolverCounterSat, 36582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40720 SdHoareTripleChecker+Valid, 9805 SdHoareTripleChecker+Invalid, 93161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 36582 IncrementalHoareTripleChecker+Valid, 56579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.7s IncrementalHoareTripleChecker+Time
[2022-12-14 11:34:17,470 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [40720 Valid, 9805 Invalid, 93161 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [36582 Valid, 56579 Invalid, 0 Unknown, 0 Unchecked, 45.7s Time]
[2022-12-14 11:34:19,108 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1970717 states.