./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c --full-output --architecture 32bit


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


Checking for memory safety (deref-memtrack)
Using default analysis
Version 8393723b
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) )
CHECK( init(main()), LTL(G valid-deref) )
CHECK( init(main()), LTL(G valid-memtrack) )

 --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1
--- 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-8393723
[2022-11-19 06:54:37,062 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-11-19 06:54:37,064 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-11-19 06:54:37,084 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-11-19 06:54:37,085 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-11-19 06:54:37,086 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-11-19 06:54:37,087 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-11-19 06:54:37,089 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-11-19 06:54:37,091 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-11-19 06:54:37,092 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-11-19 06:54:37,093 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-11-19 06:54:37,095 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-11-19 06:54:37,095 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-11-19 06:54:37,096 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-11-19 06:54:37,098 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-11-19 06:54:37,099 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-11-19 06:54:37,100 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-11-19 06:54:37,101 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-11-19 06:54:37,103 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-11-19 06:54:37,105 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-11-19 06:54:37,107 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-11-19 06:54:37,108 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-11-19 06:54:37,110 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-11-19 06:54:37,111 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-11-19 06:54:37,114 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-11-19 06:54:37,115 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-11-19 06:54:37,115 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-11-19 06:54:37,116 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-11-19 06:54:37,117 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-11-19 06:54:37,118 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-11-19 06:54:37,118 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-11-19 06:54:37,121 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-11-19 06:54:37,122 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-11-19 06:54:37,130 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-11-19 06:54:37,131 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-11-19 06:54:37,132 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-11-19 06:54:37,132 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-11-19 06:54:37,133 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-11-19 06:54:37,133 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-11-19 06:54:37,134 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-11-19 06:54:37,134 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-11-19 06:54:37,135 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf
[2022-11-19 06:54:37,176 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-11-19 06:54:37,187 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-11-19 06:54:37,187 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-11-19 06:54:37,187 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-11-19 06:54:37,188 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-11-19 06:54:37,188 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-11-19 06:54:37,188 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2022-11-19 06:54:37,189 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2022-11-19 06:54:37,189 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2022-11-19 06:54:37,189 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2022-11-19 06:54:37,189 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2022-11-19 06:54:37,190 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2022-11-19 06:54:37,190 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2022-11-19 06:54:37,190 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2022-11-19 06:54:37,190 INFO  L138        SettingsManager]:  * Interval Domain=false
[2022-11-19 06:54:37,190 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2022-11-19 06:54:37,191 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2022-11-19 06:54:37,191 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2022-11-19 06:54:37,191 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-11-19 06:54:37,191 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-11-19 06:54:37,192 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-11-19 06:54:37,192 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-11-19 06:54:37,192 INFO  L138        SettingsManager]:  * Check unreachability of error function in SV-COMP mode=false
[2022-11-19 06:54:37,192 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-11-19 06:54:37,192 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-11-19 06:54:37,193 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-11-19 06:54:37,193 INFO  L138        SettingsManager]:  * Check for the main procedure if all allocated memory was freed=true
[2022-11-19 06:54:37,193 INFO  L138        SettingsManager]:  * Bitprecise bitfields=true
[2022-11-19 06:54:37,195 INFO  L138        SettingsManager]:  * SV-COMP memtrack compatibility mode=true
[2022-11-19 06:54:37,195 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-11-19 06:54:37,195 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-11-19 06:54:37,196 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-11-19 06:54:37,196 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-11-19 06:54:37,196 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-11-19 06:54:37,196 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-11-19 06:54:37,197 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-19 06:54:37,197 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-11-19 06:54:37,197 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2022-11-19 06:54:37,198 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-11-19 06:54:37,198 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2022-11-19 06:54:37,198 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-11-19 06:54:37,199 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-11-19 06:54:37,199 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_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/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_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS
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 valid-free) )
CHECK( init(main()), LTL(G valid-deref) )
CHECK( init(main()), LTL(G valid-memtrack) )


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 -> 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1
[2022-11-19 06:54:37,468 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-11-19 06:54:37,497 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-11-19 06:54:37,501 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-11-19 06:54:37,502 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-11-19 06:54:37,503 INFO  L275        PluginConnector]: CDTParser initialized
[2022-11-19 06:54:37,504 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c
[2022-11-19 06:54:37,583 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/data/311948ac3/86597da6b60c44c0b479a40e039bc192/FLAG21224a130
[2022-11-19 06:54:37,992 INFO  L306              CDTParser]: Found 1 translation units.
[2022-11-19 06:54:37,993 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c
[2022-11-19 06:54:38,000 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/data/311948ac3/86597da6b60c44c0b479a40e039bc192/FLAG21224a130
[2022-11-19 06:54:38,405 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/data/311948ac3/86597da6b60c44c0b479a40e039bc192
[2022-11-19 06:54:38,410 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-11-19 06:54:38,413 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-11-19 06:54:38,420 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-11-19 06:54:38,421 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-11-19 06:54:38,424 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-11-19 06:54:38,425 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,428 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22d1f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38, skipping insertion in model container
[2022-11-19 06:54:38,428 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,436 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-11-19 06:54:38,452 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-11-19 06:54:38,625 WARN  L234   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_f836f651-8746-4e6a-8942-f80d293daff7/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515]
[2022-11-19 06:54:38,645 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-19 06:54:38,655 INFO  L203         MainTranslator]: Completed pre-run
[2022-11-19 06:54:38,667 WARN  L234   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_f836f651-8746-4e6a-8942-f80d293daff7/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515]
[2022-11-19 06:54:38,676 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-19 06:54:38,691 INFO  L208         MainTranslator]: Completed translation
[2022-11-19 06:54:38,691 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38 WrapperNode
[2022-11-19 06:54:38,691 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-11-19 06:54:38,692 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-11-19 06:54:38,693 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-11-19 06:54:38,693 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-11-19 06:54:38,701 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,709 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,727 INFO  L138                Inliner]: procedures = 19, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 39
[2022-11-19 06:54:38,731 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-11-19 06:54:38,732 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-11-19 06:54:38,732 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-11-19 06:54:38,732 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-11-19 06:54:38,742 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,743 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,757 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,759 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,765 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,772 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,774 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,775 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,777 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-11-19 06:54:38,778 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-11-19 06:54:38,778 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-11-19 06:54:38,778 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-11-19 06:54:38,781 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (1/1) ...
[2022-11-19 06:54:38,786 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-19 06:54:38,799 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:38,811 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-11-19 06:54:38,813 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-11-19 06:54:38,849 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-11-19 06:54:38,849 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-11-19 06:54:38,849 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-11-19 06:54:38,849 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-11-19 06:54:38,849 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2022-11-19 06:54:38,849 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2022-11-19 06:54:38,849 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2022-11-19 06:54:38,849 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-11-19 06:54:38,850 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-11-19 06:54:38,850 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2022-11-19 06:54:38,850 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-11-19 06:54:38,850 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-11-19 06:54:38,850 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-11-19 06:54:38,948 INFO  L235             CfgBuilder]: Building ICFG
[2022-11-19 06:54:38,950 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-11-19 06:54:39,239 INFO  L276             CfgBuilder]: Performing block encoding
[2022-11-19 06:54:39,301 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-11-19 06:54:39,302 INFO  L300             CfgBuilder]: Removed 0 assume(true) statements.
[2022-11-19 06:54:39,304 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:54:39 BoogieIcfgContainer
[2022-11-19 06:54:39,304 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-11-19 06:54:39,306 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-11-19 06:54:39,306 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-11-19 06:54:39,323 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-11-19 06:54:39,323 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:54:38" (1/3) ...
[2022-11-19 06:54:39,323 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db64540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:54:39, skipping insertion in model container
[2022-11-19 06:54:39,324 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:38" (2/3) ...
[2022-11-19 06:54:39,324 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db64540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:54:39, skipping insertion in model container
[2022-11-19 06:54:39,324 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:54:39" (3/3) ...
[2022-11-19 06:54:39,325 INFO  L112   eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c
[2022-11-19 06:54:39,344 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-11-19 06:54:39,344 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations.
[2022-11-19 06:54:39,392 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-11-19 06:54:39,399 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@4f27bc80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-11-19 06:54:39,400 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 17 error locations.
[2022-11-19 06:54:39,404 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 54 states, 25 states have (on average 1.76) internal successors, (44), 42 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2022-11-19 06:54:39,412 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2022-11-19 06:54:39,412 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:54:39,413 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:39,413 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:39,419 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:39,419 INFO  L85        PathProgramCache]: Analyzing trace with hash -579726195, now seen corresponding path program 1 times
[2022-11-19 06:54:39,429 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:39,429 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706223009]
[2022-11-19 06:54:39,429 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:39,430 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:39,604 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:40,129 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-11-19 06:54:40,131 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:40,131 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706223009]
[2022-11-19 06:54:40,132 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706223009] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:40,133 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-19 06:54:40,133 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-11-19 06:54:40,136 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148586279]
[2022-11-19 06:54:40,137 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:40,141 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-11-19 06:54:40,142 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:40,174 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-11-19 06:54:40,175 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2022-11-19 06:54:40,177 INFO  L87              Difference]: Start difference. First operand  has 54 states, 25 states have (on average 1.76) internal successors, (44), 42 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand  has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2022-11-19 06:54:40,406 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:40,406 INFO  L93              Difference]: Finished difference Result 83 states and 91 transitions.
[2022-11-19 06:54:40,407 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-19 06:54:40,409 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16
[2022-11-19 06:54:40,409 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:40,417 INFO  L225             Difference]: With dead ends: 83
[2022-11-19 06:54:40,418 INFO  L226             Difference]: Without dead ends: 82
[2022-11-19 06:54:40,419 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-11-19 06:54:40,423 INFO  L413           NwaCegarLoop]: 43 mSDtfsCounter, 34 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:40,424 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 202 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-19 06:54:40,443 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 82 states.
[2022-11-19 06:54:40,463 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72.
[2022-11-19 06:54:40,465 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 72 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12)
[2022-11-19 06:54:40,467 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions.
[2022-11-19 06:54:40,468 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 16
[2022-11-19 06:54:40,469 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:40,469 INFO  L495      AbstractCegarLoop]: Abstraction has 72 states and 88 transitions.
[2022-11-19 06:54:40,469 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2022-11-19 06:54:40,469 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions.
[2022-11-19 06:54:40,471 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2022-11-19 06:54:40,471 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:54:40,471 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:40,471 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-11-19 06:54:40,472 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:40,472 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:40,473 INFO  L85        PathProgramCache]: Analyzing trace with hash -581203377, now seen corresponding path program 1 times
[2022-11-19 06:54:40,473 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:40,473 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11474195]
[2022-11-19 06:54:40,473 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:40,474 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:40,488 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:40,542 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-11-19 06:54:40,543 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:40,543 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11474195]
[2022-11-19 06:54:40,543 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11474195] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:40,543 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-19 06:54:40,543 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-19 06:54:40,544 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155901245]
[2022-11-19 06:54:40,544 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:40,545 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-19 06:54:40,545 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:40,546 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-19 06:54:40,546 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-19 06:54:40,546 INFO  L87              Difference]: Start difference. First operand 72 states and 88 transitions. Second operand  has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:40,590 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:40,590 INFO  L93              Difference]: Finished difference Result 69 states and 85 transitions.
[2022-11-19 06:54:40,591 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-19 06:54:40,591 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16
[2022-11-19 06:54:40,591 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:40,592 INFO  L225             Difference]: With dead ends: 69
[2022-11-19 06:54:40,592 INFO  L226             Difference]: Without dead ends: 69
[2022-11-19 06:54:40,593 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
[2022-11-19 06:54:40,594 INFO  L413           NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:40,595 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 71 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-11-19 06:54:40,596 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 69 states.
[2022-11-19 06:54:40,602 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69.
[2022-11-19 06:54:40,603 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 69 states, 38 states have (on average 1.605263157894737) internal successors, (61), 51 states have internal predecessors, (61), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12)
[2022-11-19 06:54:40,604 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions.
[2022-11-19 06:54:40,605 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 16
[2022-11-19 06:54:40,605 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:40,605 INFO  L495      AbstractCegarLoop]: Abstraction has 69 states and 85 transitions.
[2022-11-19 06:54:40,605 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:40,606 INFO  L276                IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions.
[2022-11-19 06:54:40,606 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2022-11-19 06:54:40,606 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:54:40,607 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:40,607 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-11-19 06:54:40,607 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:40,608 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:40,608 INFO  L85        PathProgramCache]: Analyzing trace with hash -581203376, now seen corresponding path program 1 times
[2022-11-19 06:54:40,608 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:40,608 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788550534]
[2022-11-19 06:54:40,608 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:40,609 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:40,651 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:41,133 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-11-19 06:54:41,134 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:41,134 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788550534]
[2022-11-19 06:54:41,138 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788550534] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:41,138 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-19 06:54:41,139 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2022-11-19 06:54:41,139 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534948398]
[2022-11-19 06:54:41,139 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:41,139 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-19 06:54:41,140 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:41,142 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-19 06:54:41,142 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2022-11-19 06:54:41,143 INFO  L87              Difference]: Start difference. First operand 69 states and 85 transitions. Second operand  has 8 states, 5 states have (on average 2.0) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:41,450 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:41,450 INFO  L93              Difference]: Finished difference Result 74 states and 91 transitions.
[2022-11-19 06:54:41,450 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-11-19 06:54:41,451 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 5 states have (on average 2.0) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16
[2022-11-19 06:54:41,451 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:41,452 INFO  L225             Difference]: With dead ends: 74
[2022-11-19 06:54:41,452 INFO  L226             Difference]: Without dead ends: 74
[2022-11-19 06:54:41,453 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2022-11-19 06:54:41,454 INFO  L413           NwaCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:41,454 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 140 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-19 06:54:41,455 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 74 states.
[2022-11-19 06:54:41,461 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72.
[2022-11-19 06:54:41,462 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 72 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 53 states have internal predecessors, (63), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13)
[2022-11-19 06:54:41,463 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions.
[2022-11-19 06:54:41,464 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 16
[2022-11-19 06:54:41,464 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:41,464 INFO  L495      AbstractCegarLoop]: Abstraction has 72 states and 88 transitions.
[2022-11-19 06:54:41,465 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 5 states have (on average 2.0) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:41,465 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions.
[2022-11-19 06:54:41,465 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-11-19 06:54:41,466 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:54:41,466 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:41,466 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-11-19 06:54:41,466 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:41,467 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:41,467 INFO  L85        PathProgramCache]: Analyzing trace with hash -837432789, now seen corresponding path program 1 times
[2022-11-19 06:54:41,468 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:41,468 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659678442]
[2022-11-19 06:54:41,468 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:41,468 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:41,483 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:41,630 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-11-19 06:54:41,630 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:41,632 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659678442]
[2022-11-19 06:54:41,632 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659678442] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:41,633 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-19 06:54:41,633 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2022-11-19 06:54:41,636 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709482894]
[2022-11-19 06:54:41,636 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:41,636 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-19 06:54:41,639 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:41,640 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-19 06:54:41,641 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-11-19 06:54:41,641 INFO  L87              Difference]: Start difference. First operand 72 states and 88 transitions. Second operand  has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:41,782 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:41,782 INFO  L93              Difference]: Finished difference Result 82 states and 99 transitions.
[2022-11-19 06:54:41,783 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-11-19 06:54:41,783 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17
[2022-11-19 06:54:41,784 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:41,786 INFO  L225             Difference]: With dead ends: 82
[2022-11-19 06:54:41,786 INFO  L226             Difference]: Without dead ends: 82
[2022-11-19 06:54:41,786 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72
[2022-11-19 06:54:41,794 INFO  L413           NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:41,795 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 116 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-19 06:54:41,798 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 82 states.
[2022-11-19 06:54:41,806 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73.
[2022-11-19 06:54:41,809 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 73 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 54 states have internal predecessors, (64), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13)
[2022-11-19 06:54:41,811 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions.
[2022-11-19 06:54:41,811 INFO  L78                 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 17
[2022-11-19 06:54:41,811 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:41,811 INFO  L495      AbstractCegarLoop]: Abstraction has 73 states and 89 transitions.
[2022-11-19 06:54:41,812 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:41,812 INFO  L276                IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions.
[2022-11-19 06:54:41,813 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2022-11-19 06:54:41,813 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:54:41,813 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:41,813 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-11-19 06:54:41,814 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:41,814 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:41,814 INFO  L85        PathProgramCache]: Analyzing trace with hash -519129844, now seen corresponding path program 1 times
[2022-11-19 06:54:41,815 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:41,815 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286074537]
[2022-11-19 06:54:41,815 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:41,815 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:41,829 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:42,007 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-11-19 06:54:42,007 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:42,007 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286074537]
[2022-11-19 06:54:42,007 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286074537] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:42,008 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-19 06:54:42,008 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2022-11-19 06:54:42,008 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318099876]
[2022-11-19 06:54:42,008 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:42,009 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-19 06:54:42,009 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:42,010 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-19 06:54:42,010 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2022-11-19 06:54:42,011 INFO  L87              Difference]: Start difference. First operand 73 states and 89 transitions. Second operand  has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:42,155 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:42,155 INFO  L93              Difference]: Finished difference Result 77 states and 92 transitions.
[2022-11-19 06:54:42,156 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-11-19 06:54:42,156 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21
[2022-11-19 06:54:42,157 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:42,158 INFO  L225             Difference]: With dead ends: 77
[2022-11-19 06:54:42,158 INFO  L226             Difference]: Without dead ends: 77
[2022-11-19 06:54:42,158 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110
[2022-11-19 06:54:42,159 INFO  L413           NwaCegarLoop]: 41 mSDtfsCounter, 35 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:42,160 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 213 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-19 06:54:42,160 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 77 states.
[2022-11-19 06:54:42,164 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77.
[2022-11-19 06:54:42,165 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 77 states, 45 states have (on average 1.488888888888889) internal successors, (67), 57 states have internal predecessors, (67), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13)
[2022-11-19 06:54:42,166 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions.
[2022-11-19 06:54:42,166 INFO  L78                 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 21
[2022-11-19 06:54:42,167 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:42,167 INFO  L495      AbstractCegarLoop]: Abstraction has 77 states and 92 transitions.
[2022-11-19 06:54:42,167 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-11-19 06:54:42,167 INFO  L276                IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions.
[2022-11-19 06:54:42,168 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2022-11-19 06:54:42,168 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:54:42,168 INFO  L195           NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:42,168 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2022-11-19 06:54:42,169 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:42,169 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:42,170 INFO  L85        PathProgramCache]: Analyzing trace with hash -433157022, now seen corresponding path program 1 times
[2022-11-19 06:54:42,170 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:42,170 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199410314]
[2022-11-19 06:54:42,170 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:42,170 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:42,186 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:42,463 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-11-19 06:54:42,463 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:42,463 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199410314]
[2022-11-19 06:54:42,463 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199410314] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:42,464 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814762944]
[2022-11-19 06:54:42,464 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:42,464 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:42,465 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:42,469 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:54:42,487 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-11-19 06:54:42,540 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:42,543 INFO  L263         TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 27 conjunts are in the unsatisfiable core
[2022-11-19 06:54:42,559 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:54:42,676 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2022-11-19 06:54:43,094 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-11-19 06:54:43,095 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:54:43,465 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-11-19 06:54:43,465 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [814762944] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:54:43,465 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [889433028]
[2022-11-19 06:54:43,483 INFO  L159        IcfgInterpreter]: Started Sifa with 19 locations of interest
[2022-11-19 06:54:43,483 INFO  L166        IcfgInterpreter]: Building call graph
[2022-11-19 06:54:43,488 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2022-11-19 06:54:43,494 INFO  L176        IcfgInterpreter]: Starting interpretation
[2022-11-19 06:54:43,495 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2022-11-19 06:54:43,678 INFO  L190   IndexEqualityManager]: detected not equals via solver
[2022-11-19 06:54:43,680 INFO  L190   IndexEqualityManager]: detected not equals via solver
[2022-11-19 06:54:43,681 INFO  L190   IndexEqualityManager]: detected not equals via solver
[2022-11-19 06:54:43,684 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34
[2022-11-19 06:54:43,704 INFO  L190   IndexEqualityManager]: detected not equals via solver
[2022-11-19 06:54:43,706 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22
[2022-11-19 06:54:43,780 INFO  L190   IndexEqualityManager]: detected not equals via solver
[2022-11-19 06:54:43,782 INFO  L190   IndexEqualityManager]: detected not equals via solver
[2022-11-19 06:54:43,804 INFO  L321             Elim1Store]: treesize reduction 18, result has 35.7 percent of original size
[2022-11-19 06:54:43,805 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45
[2022-11-19 06:54:43,851 INFO  L197        IcfgInterpreter]: Interpreting procedure check with input of size 81 for LOIs
[2022-11-19 06:54:44,323 INFO  L197        IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 81 for LOIs
[2022-11-19 06:54:44,401 INFO  L197        IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs
[2022-11-19 06:54:44,403 INFO  L180        IcfgInterpreter]: Interpretation finished
[2022-11-19 06:54:46,953 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSifa [889433028] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:46,954 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:54:46,954 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7, 8, 7] total 31
[2022-11-19 06:54:46,955 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115157911]
[2022-11-19 06:54:46,955 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:46,955 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2022-11-19 06:54:46,955 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:46,956 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2022-11-19 06:54:46,956 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992
[2022-11-19 06:54:46,956 INFO  L87              Difference]: Start difference. First operand 77 states and 92 transitions. Second operand  has 15 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4)
[2022-11-19 06:54:47,403 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:47,403 INFO  L93              Difference]: Finished difference Result 80 states and 86 transitions.
[2022-11-19 06:54:47,403 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2022-11-19 06:54:47,404 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22
[2022-11-19 06:54:47,404 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:47,404 INFO  L225             Difference]: With dead ends: 80
[2022-11-19 06:54:47,404 INFO  L226             Difference]: Without dead ends: 66
[2022-11-19 06:54:47,405 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992
[2022-11-19 06:54:47,406 INFO  L413           NwaCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:47,406 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 131 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 229 Invalid, 0 Unknown, 57 Unchecked, 0.4s Time]
[2022-11-19 06:54:47,407 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 66 states.
[2022-11-19 06:54:47,411 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62.
[2022-11-19 06:54:47,411 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 62 states, 35 states have (on average 1.4) internal successors, (49), 44 states have internal predecessors, (49), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-11-19 06:54:47,412 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions.
[2022-11-19 06:54:47,412 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 22
[2022-11-19 06:54:47,413 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:47,413 INFO  L495      AbstractCegarLoop]: Abstraction has 62 states and 71 transitions.
[2022-11-19 06:54:47,413 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4)
[2022-11-19 06:54:47,413 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions.
[2022-11-19 06:54:47,414 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2022-11-19 06:54:47,414 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:54:47,414 INFO  L195           NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:47,427 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-11-19 06:54:47,623 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2022-11-19 06:54:47,623 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:47,624 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:47,624 INFO  L85        PathProgramCache]: Analyzing trace with hash -186866169, now seen corresponding path program 1 times
[2022-11-19 06:54:47,624 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:47,624 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204227331]
[2022-11-19 06:54:47,625 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:47,625 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:47,644 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:48,051 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-11-19 06:54:48,051 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:48,051 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204227331]
[2022-11-19 06:54:48,051 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204227331] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:48,051 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020525593]
[2022-11-19 06:54:48,051 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:48,052 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:48,052 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:48,053 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:54:48,078 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-11-19 06:54:48,142 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:48,144 INFO  L263         TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core
[2022-11-19 06:54:48,146 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:54:48,330 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32
[2022-11-19 06:54:48,713 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-11-19 06:54:48,713 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:54:48,883 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38
[2022-11-19 06:54:49,054 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2022-11-19 06:54:49,054 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020525593] provided 1 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:49,054 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences.
[2022-11-19 06:54:49,055 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 12] total 24
[2022-11-19 06:54:49,055 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873918947]
[2022-11-19 06:54:49,055 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:49,055 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-19 06:54:49,056 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:49,056 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-19 06:54:49,057 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552
[2022-11-19 06:54:49,057 INFO  L87              Difference]: Start difference. First operand 62 states and 71 transitions. Second operand  has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-11-19 06:54:49,195 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:49,195 INFO  L93              Difference]: Finished difference Result 66 states and 74 transitions.
[2022-11-19 06:54:49,196 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-19 06:54:49,196 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30
[2022-11-19 06:54:49,197 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:49,197 INFO  L225             Difference]: With dead ends: 66
[2022-11-19 06:54:49,197 INFO  L226             Difference]: Without dead ends: 66
[2022-11-19 06:54:49,199 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650
[2022-11-19 06:54:49,200 INFO  L413           NwaCegarLoop]: 26 mSDtfsCounter, 75 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:49,200 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 93 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-19 06:54:49,201 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 66 states.
[2022-11-19 06:54:49,216 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66.
[2022-11-19 06:54:49,216 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 66 states, 38 states have (on average 1.368421052631579) internal successors, (52), 47 states have internal predecessors, (52), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-11-19 06:54:49,217 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions.
[2022-11-19 06:54:49,217 INFO  L78                 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 30
[2022-11-19 06:54:49,217 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:49,217 INFO  L495      AbstractCegarLoop]: Abstraction has 66 states and 74 transitions.
[2022-11-19 06:54:49,218 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-11-19 06:54:49,218 INFO  L276                IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions.
[2022-11-19 06:54:49,219 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2022-11-19 06:54:49,219 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:54:49,219 INFO  L195           NwaCegarLoop]: trace histogram [3, 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]
[2022-11-19 06:54:49,227 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-11-19 06:54:49,425 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:49,426 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting checkErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:49,426 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:49,426 INFO  L85        PathProgramCache]: Analyzing trace with hash -188334095, now seen corresponding path program 1 times
[2022-11-19 06:54:49,426 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:49,426 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209379876]
[2022-11-19 06:54:49,427 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:49,427 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:49,437 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:49,466 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2022-11-19 06:54:49,466 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:49,467 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209379876]
[2022-11-19 06:54:49,467 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209379876] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:49,467 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-19 06:54:49,467 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-19 06:54:49,467 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718432151]
[2022-11-19 06:54:49,467 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:49,468 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-19 06:54:49,468 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:49,468 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-19 06:54:49,468 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-19 06:54:49,468 INFO  L87              Difference]: Start difference. First operand 66 states and 74 transitions. Second operand  has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2022-11-19 06:54:49,502 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:49,503 INFO  L93              Difference]: Finished difference Result 65 states and 72 transitions.
[2022-11-19 06:54:49,503 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-19 06:54:49,503 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30
[2022-11-19 06:54:49,504 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:49,504 INFO  L225             Difference]: With dead ends: 65
[2022-11-19 06:54:49,504 INFO  L226             Difference]: Without dead ends: 65
[2022-11-19 06:54:49,505 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
[2022-11-19 06:54:49,505 INFO  L413           NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:49,506 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 54 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-11-19 06:54:49,506 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 65 states.
[2022-11-19 06:54:49,516 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63.
[2022-11-19 06:54:49,517 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 63 states, 38 states have (on average 1.236842105263158) internal successors, (47), 44 states have internal predecessors, (47), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-11-19 06:54:49,519 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions.
[2022-11-19 06:54:49,519 INFO  L78                 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 30
[2022-11-19 06:54:49,520 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:49,520 INFO  L495      AbstractCegarLoop]: Abstraction has 63 states and 69 transitions.
[2022-11-19 06:54:49,520 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2022-11-19 06:54:49,520 INFO  L276                IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions.
[2022-11-19 06:54:49,522 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2022-11-19 06:54:49,523 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:54:49,523 INFO  L195           NwaCegarLoop]: trace histogram [3, 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]
[2022-11-19 06:54:49,524 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2022-11-19 06:54:49,524 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:49,524 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:49,525 INFO  L85        PathProgramCache]: Analyzing trace with hash -188334094, now seen corresponding path program 1 times
[2022-11-19 06:54:49,525 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:49,525 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103869422]
[2022-11-19 06:54:49,525 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:49,525 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:49,549 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:49,812 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-11-19 06:54:49,813 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:49,813 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103869422]
[2022-11-19 06:54:49,813 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103869422] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:49,813 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761914453]
[2022-11-19 06:54:49,813 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:49,814 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:49,814 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:49,815 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:54:49,827 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-11-19 06:54:49,898 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:49,900 INFO  L263         TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core
[2022-11-19 06:54:49,902 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:54:50,101 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-11-19 06:54:50,101 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:54:50,144 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26
[2022-11-19 06:54:50,367 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-11-19 06:54:50,367 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761914453] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:54:50,367 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2059391345]
[2022-11-19 06:54:50,370 INFO  L159        IcfgInterpreter]: Started Sifa with 25 locations of interest
[2022-11-19 06:54:50,370 INFO  L166        IcfgInterpreter]: Building call graph
[2022-11-19 06:54:50,371 FATAL L?                        ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
	at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:54:50,374 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:54:50,374 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18
[2022-11-19 06:54:50,374 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475893886]
[2022-11-19 06:54:50,374 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:54:50,375 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2022-11-19 06:54:50,375 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:50,376 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2022-11-19 06:54:50,376 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342
[2022-11-19 06:54:50,376 INFO  L87              Difference]: Start difference. First operand 63 states and 69 transitions. Second operand  has 19 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 11 states have call predecessors, (12), 7 states have call successors, (12)
[2022-11-19 06:54:50,651 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:50,651 INFO  L93              Difference]: Finished difference Result 71 states and 77 transitions.
[2022-11-19 06:54:50,652 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-11-19 06:54:50,652 INFO  L78                 Accepts]: Start accepts. Automaton has  has 19 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 11 states have call predecessors, (12), 7 states have call successors, (12) Word has length 30
[2022-11-19 06:54:50,652 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:50,653 INFO  L225             Difference]: With dead ends: 71
[2022-11-19 06:54:50,653 INFO  L226             Difference]: Without dead ends: 71
[2022-11-19 06:54:50,653 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462
[2022-11-19 06:54:50,654 INFO  L413           NwaCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:50,654 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 254 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 242 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time]
[2022-11-19 06:54:50,655 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 71 states.
[2022-11-19 06:54:50,658 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69.
[2022-11-19 06:54:50,658 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 69 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 49 states have internal predecessors, (51), 11 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13)
[2022-11-19 06:54:50,658 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions.
[2022-11-19 06:54:50,659 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 30
[2022-11-19 06:54:50,659 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:50,659 INFO  L495      AbstractCegarLoop]: Abstraction has 69 states and 75 transitions.
[2022-11-19 06:54:50,659 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 19 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 11 states have call predecessors, (12), 7 states have call successors, (12)
[2022-11-19 06:54:50,660 INFO  L276                IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions.
[2022-11-19 06:54:50,660 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-11-19 06:54:50,660 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:54:50,661 INFO  L195           NwaCegarLoop]: trace histogram [3, 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]
[2022-11-19 06:54:50,667 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-11-19 06:54:50,861 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:50,861 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:50,862 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:50,862 INFO  L85        PathProgramCache]: Analyzing trace with hash -1543388343, now seen corresponding path program 1 times
[2022-11-19 06:54:50,862 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:50,862 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207164064]
[2022-11-19 06:54:50,862 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:50,862 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:50,879 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:51,302 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-11-19 06:54:51,302 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:51,303 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207164064]
[2022-11-19 06:54:51,303 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207164064] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:51,303 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341171829]
[2022-11-19 06:54:51,303 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:51,303 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:51,303 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:51,304 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:54:51,330 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-11-19 06:54:51,389 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:51,391 INFO  L263         TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core
[2022-11-19 06:54:51,393 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:54:51,547 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32
[2022-11-19 06:54:51,850 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-11-19 06:54:51,850 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:54:52,136 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38
[2022-11-19 06:54:52,142 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26
[2022-11-19 06:54:52,310 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-11-19 06:54:52,311 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [341171829] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:54:52,311 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [853346001]
[2022-11-19 06:54:52,313 INFO  L159        IcfgInterpreter]: Started Sifa with 26 locations of interest
[2022-11-19 06:54:52,314 INFO  L166        IcfgInterpreter]: Building call graph
[2022-11-19 06:54:52,314 FATAL L?                        ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
	at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:54:52,315 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:54:52,316 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29
[2022-11-19 06:54:52,316 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488000644]
[2022-11-19 06:54:52,316 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:54:52,316 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2022-11-19 06:54:52,317 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:52,317 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2022-11-19 06:54:52,318 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870
[2022-11-19 06:54:52,318 INFO  L87              Difference]: Start difference. First operand 69 states and 75 transitions. Second operand  has 30 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 9 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11)
[2022-11-19 06:54:53,277 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:53,277 INFO  L93              Difference]: Finished difference Result 85 states and 93 transitions.
[2022-11-19 06:54:53,278 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2022-11-19 06:54:53,278 INFO  L78                 Accepts]: Start accepts. Automaton has  has 30 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 9 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 31
[2022-11-19 06:54:53,278 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:53,279 INFO  L225             Difference]: With dead ends: 85
[2022-11-19 06:54:53,279 INFO  L226             Difference]: Without dead ends: 85
[2022-11-19 06:54:53,280 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560
[2022-11-19 06:54:53,281 INFO  L413           NwaCegarLoop]: 31 mSDtfsCounter, 84 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:53,281 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 313 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 506 Invalid, 0 Unknown, 134 Unchecked, 0.5s Time]
[2022-11-19 06:54:53,281 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2022-11-19 06:54:53,285 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75.
[2022-11-19 06:54:53,286 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 75 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 53 states have internal predecessors, (58), 11 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13)
[2022-11-19 06:54:53,286 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions.
[2022-11-19 06:54:53,287 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 31
[2022-11-19 06:54:53,287 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:53,287 INFO  L495      AbstractCegarLoop]: Abstraction has 75 states and 82 transitions.
[2022-11-19 06:54:53,287 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 30 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 9 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11)
[2022-11-19 06:54:53,288 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions.
[2022-11-19 06:54:53,288 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2022-11-19 06:54:53,288 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:54:53,289 INFO  L195           NwaCegarLoop]: trace histogram [3, 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]
[2022-11-19 06:54:53,294 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-11-19 06:54:53,494 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2022-11-19 06:54:53,494 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:53,495 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:53,495 INFO  L85        PathProgramCache]: Analyzing trace with hash 2103192050, now seen corresponding path program 1 times
[2022-11-19 06:54:53,495 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:53,495 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339886078]
[2022-11-19 06:54:53,495 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:53,495 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:53,508 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:53,709 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-11-19 06:54:53,709 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:53,709 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339886078]
[2022-11-19 06:54:53,709 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339886078] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:53,709 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264820860]
[2022-11-19 06:54:53,710 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:53,710 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:53,710 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:53,711 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:54:53,743 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-11-19 06:54:53,827 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:53,829 INFO  L263         TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjunts are in the unsatisfiable core
[2022-11-19 06:54:53,832 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:54:53,870 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6
[2022-11-19 06:54:54,135 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23
[2022-11-19 06:54:54,221 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-11-19 06:54:54,221 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:54:56,340 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [264820860] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:56,340 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [205339617]
[2022-11-19 06:54:56,342 INFO  L159        IcfgInterpreter]: Started Sifa with 28 locations of interest
[2022-11-19 06:54:56,342 INFO  L166        IcfgInterpreter]: Building call graph
[2022-11-19 06:54:56,342 FATAL L?                        ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
	at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:54:56,343 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-11-19 06:54:56,343 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20
[2022-11-19 06:54:56,343 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330198608]
[2022-11-19 06:54:56,343 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:54:56,344 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2022-11-19 06:54:56,344 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:56,344 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2022-11-19 06:54:56,344 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506
[2022-11-19 06:54:56,345 INFO  L87              Difference]: Start difference. First operand 75 states and 82 transitions. Second operand  has 20 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)
[2022-11-19 06:54:56,653 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:56,653 INFO  L93              Difference]: Finished difference Result 75 states and 81 transitions.
[2022-11-19 06:54:56,653 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2022-11-19 06:54:56,654 INFO  L78                 Accepts]: Start accepts. Automaton has  has 20 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 35
[2022-11-19 06:54:56,654 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:56,654 INFO  L225             Difference]: With dead ends: 75
[2022-11-19 06:54:56,655 INFO  L226             Difference]: Without dead ends: 75
[2022-11-19 06:54:56,655 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812
[2022-11-19 06:54:56,656 INFO  L413           NwaCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:56,656 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 178 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 293 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time]
[2022-11-19 06:54:56,656 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 75 states.
[2022-11-19 06:54:56,659 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75.
[2022-11-19 06:54:56,659 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 75 states, 48 states have (on average 1.1875) internal successors, (57), 52 states have internal predecessors, (57), 11 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13)
[2022-11-19 06:54:56,660 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions.
[2022-11-19 06:54:56,660 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 35
[2022-11-19 06:54:56,660 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:56,660 INFO  L495      AbstractCegarLoop]: Abstraction has 75 states and 81 transitions.
[2022-11-19 06:54:56,660 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 20 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)
[2022-11-19 06:54:56,660 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions.
[2022-11-19 06:54:56,661 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2022-11-19 06:54:56,661 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:54:56,661 INFO  L195           NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:56,675 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2022-11-19 06:54:56,862 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2022-11-19 06:54:56,862 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:56,862 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:56,862 INFO  L85        PathProgramCache]: Analyzing trace with hash -480208292, now seen corresponding path program 1 times
[2022-11-19 06:54:56,863 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:56,863 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407842357]
[2022-11-19 06:54:56,863 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:56,863 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:56,875 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:57,333 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-11-19 06:54:57,333 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:57,333 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407842357]
[2022-11-19 06:54:57,334 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407842357] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:57,334 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837288509]
[2022-11-19 06:54:57,334 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:57,334 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:57,334 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:57,335 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:54:57,359 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2022-11-19 06:54:57,422 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:57,424 INFO  L263         TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 29 conjunts are in the unsatisfiable core
[2022-11-19 06:54:57,431 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:54:57,443 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2022-11-19 06:54:57,577 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32
[2022-11-19 06:54:57,884 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-11-19 06:54:57,884 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:54:57,988 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38
[2022-11-19 06:54:58,182 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-11-19 06:54:58,182 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837288509] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:54:58,182 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22365198]
[2022-11-19 06:54:58,185 INFO  L159        IcfgInterpreter]: Started Sifa with 21 locations of interest
[2022-11-19 06:54:58,187 INFO  L166        IcfgInterpreter]: Building call graph
[2022-11-19 06:54:58,188 FATAL L?                        ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
	at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:54:58,189 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:54:58,189 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21
[2022-11-19 06:54:58,190 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756154771]
[2022-11-19 06:54:58,190 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:54:58,191 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2022-11-19 06:54:58,192 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:58,192 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2022-11-19 06:54:58,192 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462
[2022-11-19 06:54:58,193 INFO  L87              Difference]: Start difference. First operand 75 states and 81 transitions. Second operand  has 22 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14)
[2022-11-19 06:54:58,868 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:58,868 INFO  L93              Difference]: Finished difference Result 75 states and 80 transitions.
[2022-11-19 06:54:58,869 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2022-11-19 06:54:58,869 INFO  L78                 Accepts]: Start accepts. Automaton has  has 22 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 36
[2022-11-19 06:54:58,869 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:58,870 INFO  L225             Difference]: With dead ends: 75
[2022-11-19 06:54:58,870 INFO  L226             Difference]: Without dead ends: 75
[2022-11-19 06:54:58,870 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930
[2022-11-19 06:54:58,871 INFO  L413           NwaCegarLoop]: 27 mSDtfsCounter, 130 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:58,871 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 174 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 287 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time]
[2022-11-19 06:54:58,871 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 75 states.
[2022-11-19 06:54:58,873 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74.
[2022-11-19 06:54:58,873 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 74 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 51 states have internal predecessors, (56), 11 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13)
[2022-11-19 06:54:58,874 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions.
[2022-11-19 06:54:58,874 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 36
[2022-11-19 06:54:58,874 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:58,874 INFO  L495      AbstractCegarLoop]: Abstraction has 74 states and 80 transitions.
[2022-11-19 06:54:58,874 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 22 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14)
[2022-11-19 06:54:58,878 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions.
[2022-11-19 06:54:58,879 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2022-11-19 06:54:58,880 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:54:58,880 INFO  L195           NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:58,890 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2022-11-19 06:54:59,085 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:59,085 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:59,086 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:59,086 INFO  L85        PathProgramCache]: Analyzing trace with hash -480208293, now seen corresponding path program 1 times
[2022-11-19 06:54:59,086 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:59,086 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75789114]
[2022-11-19 06:54:59,086 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:59,086 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:59,099 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:59,156 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-11-19 06:54:59,157 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:59,157 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75789114]
[2022-11-19 06:54:59,157 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75789114] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-19 06:54:59,157 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-19 06:54:59,157 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-19 06:54:59,158 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645565034]
[2022-11-19 06:54:59,158 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-19 06:54:59,159 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-19 06:54:59,160 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:54:59,160 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-19 06:54:59,160 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-11-19 06:54:59,161 INFO  L87              Difference]: Start difference. First operand 74 states and 80 transitions. Second operand  has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6)
[2022-11-19 06:54:59,227 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:54:59,227 INFO  L93              Difference]: Finished difference Result 74 states and 79 transitions.
[2022-11-19 06:54:59,228 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-11-19 06:54:59,228 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 36
[2022-11-19 06:54:59,228 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:54:59,230 INFO  L225             Difference]: With dead ends: 74
[2022-11-19 06:54:59,230 INFO  L226             Difference]: Without dead ends: 74
[2022-11-19 06:54:59,230 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-11-19 06:54:59,232 INFO  L413           NwaCegarLoop]: 38 mSDtfsCounter, 24 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-19 06:54:59,232 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 74 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-19 06:54:59,233 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 74 states.
[2022-11-19 06:54:59,237 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73.
[2022-11-19 06:54:59,238 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 73 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 50 states have internal predecessors, (55), 11 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13)
[2022-11-19 06:54:59,238 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions.
[2022-11-19 06:54:59,239 INFO  L78                 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 36
[2022-11-19 06:54:59,239 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:54:59,239 INFO  L495      AbstractCegarLoop]: Abstraction has 73 states and 79 transitions.
[2022-11-19 06:54:59,239 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6)
[2022-11-19 06:54:59,239 INFO  L276                IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions.
[2022-11-19 06:54:59,240 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2022-11-19 06:54:59,240 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:54:59,240 INFO  L195           NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:54:59,240 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2022-11-19 06:54:59,241 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:54:59,241 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:54:59,241 INFO  L85        PathProgramCache]: Analyzing trace with hash -2001555175, now seen corresponding path program 1 times
[2022-11-19 06:54:59,241 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:54:59,242 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665722312]
[2022-11-19 06:54:59,242 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:59,242 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:54:59,260 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:59,677 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-11-19 06:54:59,678 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:54:59,678 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665722312]
[2022-11-19 06:54:59,678 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665722312] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:54:59,678 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738708224]
[2022-11-19 06:54:59,678 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:54:59,678 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:54:59,678 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:54:59,680 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:54:59,703 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2022-11-19 06:54:59,756 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:54:59,757 INFO  L263         TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core
[2022-11-19 06:54:59,760 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:54:59,765 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2022-11-19 06:55:00,006 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2022-11-19 06:55:00,006 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:55:00,490 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2022-11-19 06:55:00,490 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [738708224] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:55:00,491 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773614923]
[2022-11-19 06:55:00,493 INFO  L159        IcfgInterpreter]: Started Sifa with 21 locations of interest
[2022-11-19 06:55:00,493 INFO  L166        IcfgInterpreter]: Building call graph
[2022-11-19 06:55:00,493 FATAL L?                        ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
	at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:55:00,494 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:55:00,494 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25
[2022-11-19 06:55:00,494 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992691602]
[2022-11-19 06:55:00,494 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:55:00,494 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 26 states
[2022-11-19 06:55:00,494 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:55:00,495 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2022-11-19 06:55:00,495 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650
[2022-11-19 06:55:00,495 INFO  L87              Difference]: Start difference. First operand 73 states and 79 transitions. Second operand  has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 13 states have call successors, (20), 7 states have call predecessors, (20), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14)
[2022-11-19 06:55:01,585 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:55:01,586 INFO  L93              Difference]: Finished difference Result 91 states and 101 transitions.
[2022-11-19 06:55:01,586 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2022-11-19 06:55:01,586 INFO  L78                 Accepts]: Start accepts. Automaton has  has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 13 states have call successors, (20), 7 states have call predecessors, (20), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 37
[2022-11-19 06:55:01,587 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:55:01,587 INFO  L225             Difference]: With dead ends: 91
[2022-11-19 06:55:01,587 INFO  L226             Difference]: Without dead ends: 91
[2022-11-19 06:55:01,588 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482
[2022-11-19 06:55:01,588 INFO  L413           NwaCegarLoop]: 27 mSDtfsCounter, 256 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-11-19 06:55:01,589 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 247 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-11-19 06:55:01,589 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 91 states.
[2022-11-19 06:55:01,592 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88.
[2022-11-19 06:55:01,592 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 88 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 15 states have call successors, (15), 9 states have call predecessors, (15), 11 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18)
[2022-11-19 06:55:01,593 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions.
[2022-11-19 06:55:01,593 INFO  L78                 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 37
[2022-11-19 06:55:01,593 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:55:01,594 INFO  L495      AbstractCegarLoop]: Abstraction has 88 states and 101 transitions.
[2022-11-19 06:55:01,594 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 13 states have call successors, (20), 7 states have call predecessors, (20), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14)
[2022-11-19 06:55:01,594 INFO  L276                IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions.
[2022-11-19 06:55:01,597 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2022-11-19 06:55:01,598 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:55:01,598 INFO  L195           NwaCegarLoop]: trace histogram [3, 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]
[2022-11-19 06:55:01,608 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2022-11-19 06:55:01,798 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2022-11-19 06:55:01,798 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:55:01,799 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:55:01,799 INFO  L85        PathProgramCache]: Analyzing trace with hash -289533904, now seen corresponding path program 1 times
[2022-11-19 06:55:01,799 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:55:01,799 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593378047]
[2022-11-19 06:55:01,799 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:55:01,799 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:55:01,816 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:55:02,602 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2022-11-19 06:55:02,602 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:55:02,602 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593378047]
[2022-11-19 06:55:02,602 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593378047] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:55:02,602 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440073936]
[2022-11-19 06:55:02,602 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:55:02,602 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:55:02,603 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:55:02,604 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:55:02,608 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2022-11-19 06:55:02,683 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:55:02,685 INFO  L263         TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core
[2022-11-19 06:55:02,687 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:55:02,981 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2022-11-19 06:55:02,981 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:55:03,090 INFO  L321             Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2022-11-19 06:55:03,091 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34
[2022-11-19 06:55:03,256 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2022-11-19 06:55:03,257 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440073936] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:55:03,257 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1640746544]
[2022-11-19 06:55:03,260 INFO  L159        IcfgInterpreter]: Started Sifa with 31 locations of interest
[2022-11-19 06:55:03,260 INFO  L166        IcfgInterpreter]: Building call graph
[2022-11-19 06:55:03,261 FATAL L?                        ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
	at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:55:03,262 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:55:03,262 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 6] total 21
[2022-11-19 06:55:03,262 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418559992]
[2022-11-19 06:55:03,262 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:55:03,263 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2022-11-19 06:55:03,263 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:55:03,263 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2022-11-19 06:55:03,264 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462
[2022-11-19 06:55:03,264 INFO  L87              Difference]: Start difference. First operand 88 states and 101 transitions. Second operand  has 22 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16)
[2022-11-19 06:55:04,312 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:55:04,312 INFO  L93              Difference]: Finished difference Result 103 states and 118 transitions.
[2022-11-19 06:55:04,314 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2022-11-19 06:55:04,314 INFO  L78                 Accepts]: Start accepts. Automaton has  has 22 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) Word has length 42
[2022-11-19 06:55:04,314 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:55:04,315 INFO  L225             Difference]: With dead ends: 103
[2022-11-19 06:55:04,315 INFO  L226             Difference]: Without dead ends: 84
[2022-11-19 06:55:04,316 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406
[2022-11-19 06:55:04,317 INFO  L413           NwaCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-11-19 06:55:04,317 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 269 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 362 Invalid, 0 Unknown, 24 Unchecked, 0.3s Time]
[2022-11-19 06:55:04,317 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 84 states.
[2022-11-19 06:55:04,320 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75.
[2022-11-19 06:55:04,321 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 75 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15)
[2022-11-19 06:55:04,322 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions.
[2022-11-19 06:55:04,322 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 42
[2022-11-19 06:55:04,322 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:55:04,322 INFO  L495      AbstractCegarLoop]: Abstraction has 75 states and 86 transitions.
[2022-11-19 06:55:04,323 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 22 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16)
[2022-11-19 06:55:04,323 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions.
[2022-11-19 06:55:04,323 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2022-11-19 06:55:04,324 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:55:04,324 INFO  L195           NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:55:04,339 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2022-11-19 06:55:04,534 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2022-11-19 06:55:04,534 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:55:04,535 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:55:04,535 INFO  L85        PathProgramCache]: Analyzing trace with hash -462441492, now seen corresponding path program 2 times
[2022-11-19 06:55:04,535 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:55:04,535 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451018028]
[2022-11-19 06:55:04,535 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:55:04,535 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:55:04,560 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:55:05,117 INFO  L134       CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2022-11-19 06:55:05,117 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:55:05,117 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451018028]
[2022-11-19 06:55:05,117 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451018028] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:55:05,117 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292611544]
[2022-11-19 06:55:05,117 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-11-19 06:55:05,118 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:55:05,118 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:55:05,119 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:55:05,146 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2022-11-19 06:55:05,220 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2022-11-19 06:55:05,220 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-11-19 06:55:05,222 INFO  L263         TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 24 conjunts are in the unsatisfiable core
[2022-11-19 06:55:05,224 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:55:05,510 INFO  L134       CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2022-11-19 06:55:05,511 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:55:05,813 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33
[2022-11-19 06:55:06,029 INFO  L134       CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2022-11-19 06:55:06,030 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292611544] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:55:06,030 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1635363087]
[2022-11-19 06:55:06,034 INFO  L159        IcfgInterpreter]: Started Sifa with 25 locations of interest
[2022-11-19 06:55:06,034 INFO  L166        IcfgInterpreter]: Building call graph
[2022-11-19 06:55:06,034 FATAL L?                        ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
	at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:55:06,035 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:55:06,036 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 23
[2022-11-19 06:55:06,038 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28418532]
[2022-11-19 06:55:06,038 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:55:06,040 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2022-11-19 06:55:06,041 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:55:06,041 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2022-11-19 06:55:06,042 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552
[2022-11-19 06:55:06,043 INFO  L87              Difference]: Start difference. First operand 75 states and 86 transitions. Second operand  has 24 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 17 states have internal predecessors, (51), 11 states have call successors, (23), 8 states have call predecessors, (23), 3 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18)
[2022-11-19 06:55:06,938 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:55:06,938 INFO  L93              Difference]: Finished difference Result 84 states and 93 transitions.
[2022-11-19 06:55:06,939 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2022-11-19 06:55:06,939 INFO  L78                 Accepts]: Start accepts. Automaton has  has 24 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 17 states have internal predecessors, (51), 11 states have call successors, (23), 8 states have call predecessors, (23), 3 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) Word has length 44
[2022-11-19 06:55:06,939 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:55:06,940 INFO  L225             Difference]: With dead ends: 84
[2022-11-19 06:55:06,940 INFO  L226             Difference]: Without dead ends: 84
[2022-11-19 06:55:06,941 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260
[2022-11-19 06:55:06,941 INFO  L413           NwaCegarLoop]: 29 mSDtfsCounter, 86 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-11-19 06:55:06,941 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 297 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 490 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time]
[2022-11-19 06:55:06,942 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 84 states.
[2022-11-19 06:55:06,945 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74.
[2022-11-19 06:55:06,945 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 74 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15)
[2022-11-19 06:55:06,946 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions.
[2022-11-19 06:55:06,946 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 44
[2022-11-19 06:55:06,946 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:55:06,946 INFO  L495      AbstractCegarLoop]: Abstraction has 74 states and 82 transitions.
[2022-11-19 06:55:06,947 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 24 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 17 states have internal predecessors, (51), 11 states have call successors, (23), 8 states have call predecessors, (23), 3 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18)
[2022-11-19 06:55:06,947 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions.
[2022-11-19 06:55:06,947 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2022-11-19 06:55:06,948 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-19 06:55:06,948 INFO  L195           NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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]
[2022-11-19 06:55:06,959 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2022-11-19 06:55:07,153 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2022-11-19 06:55:07,154 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] ===
[2022-11-19 06:55:07,154 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-19 06:55:07,154 INFO  L85        PathProgramCache]: Analyzing trace with hash 1892399234, now seen corresponding path program 1 times
[2022-11-19 06:55:07,154 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-19 06:55:07,154 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256485544]
[2022-11-19 06:55:07,155 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:55:07,155 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-19 06:55:07,173 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:55:08,127 INFO  L134       CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked.
[2022-11-19 06:55:08,127 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-19 06:55:08,127 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256485544]
[2022-11-19 06:55:08,127 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256485544] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-19 06:55:08,127 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110683124]
[2022-11-19 06:55:08,128 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-19 06:55:08,128 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-19 06:55:08,128 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3
[2022-11-19 06:55:08,131 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-19 06:55:08,164 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2022-11-19 06:55:08,228 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-19 06:55:08,230 INFO  L263         TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 24 conjunts are in the unsatisfiable core
[2022-11-19 06:55:08,232 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-19 06:55:08,236 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2022-11-19 06:55:08,531 INFO  L134       CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked.
[2022-11-19 06:55:08,531 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-11-19 06:55:08,883 INFO  L134       CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked.
[2022-11-19 06:55:08,883 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110683124] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-19 06:55:08,883 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1053910964]
[2022-11-19 06:55:08,885 INFO  L159        IcfgInterpreter]: Started Sifa with 28 locations of interest
[2022-11-19 06:55:08,886 INFO  L166        IcfgInterpreter]: Building call graph
[2022-11-19 06:55:08,886 FATAL L?                        ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
	at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:82)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2022-11-19 06:55:08,887 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-19 06:55:08,887 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 6] total 25
[2022-11-19 06:55:08,887 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918293217]
[2022-11-19 06:55:08,887 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-19 06:55:08,888 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 26 states
[2022-11-19 06:55:08,888 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-19 06:55:08,888 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2022-11-19 06:55:08,889 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650
[2022-11-19 06:55:08,889 INFO  L87              Difference]: Start difference. First operand 74 states and 82 transitions. Second operand  has 26 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 10 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20)
[2022-11-19 06:55:10,256 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-19 06:55:10,256 INFO  L93              Difference]: Finished difference Result 84 states and 92 transitions.
[2022-11-19 06:55:10,256 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2022-11-19 06:55:10,257 INFO  L78                 Accepts]: Start accepts. Automaton has  has 26 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 10 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20) Word has length 56
[2022-11-19 06:55:10,257 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-19 06:55:10,257 INFO  L225             Difference]: With dead ends: 84
[2022-11-19 06:55:10,257 INFO  L226             Difference]: Without dead ends: 0
[2022-11-19 06:55:10,258 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=284, Invalid=1878, Unknown=0, NotChecked=0, Total=2162
[2022-11-19 06:55:10,259 INFO  L413           NwaCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-11-19 06:55:10,259 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 266 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 389 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time]
[2022-11-19 06:55:10,259 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2022-11-19 06:55:10,259 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2022-11-19 06:55:10,260 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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)
[2022-11-19 06:55:10,260 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2022-11-19 06:55:10,260 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56
[2022-11-19 06:55:10,260 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-19 06:55:10,260 INFO  L495      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2022-11-19 06:55:10,261 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 26 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 10 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20)
[2022-11-19 06:55:10,261 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2022-11-19 06:55:10,261 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2022-11-19 06:55:10,263 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 17 remaining)
[2022-11-19 06:55:10,264 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining)
[2022-11-19 06:55:10,264 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining)
[2022-11-19 06:55:10,264 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining)
[2022-11-19 06:55:10,265 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (12 of 17 remaining)
[2022-11-19 06:55:10,265 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE (11 of 17 remaining)
[2022-11-19 06:55:10,265 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (10 of 17 remaining)
[2022-11-19 06:55:10,265 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (9 of 17 remaining)
[2022-11-19 06:55:10,265 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining)
[2022-11-19 06:55:10,266 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 17 remaining)
[2022-11-19 06:55:10,266 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 17 remaining)
[2022-11-19 06:55:10,266 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining)
[2022-11-19 06:55:10,266 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 17 remaining)
[2022-11-19 06:55:10,266 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 17 remaining)
[2022-11-19 06:55:10,267 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 17 remaining)
[2022-11-19 06:55:10,267 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 17 remaining)
[2022-11-19 06:55:10,267 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining)
[2022-11-19 06:55:10,277 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2022-11-19 06:55:10,472 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2022-11-19 06:55:10,475 INFO  L444         BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-19 06:55:10,477 INFO  L178   ceAbstractionStarter]: Computing trace abstraction results
[2022-11-19 06:55:10,479 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:55:10 BoogieIcfgContainer
[2022-11-19 06:55:10,479 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-11-19 06:55:10,480 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2022-11-19 06:55:10,480 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2022-11-19 06:55:10,481 INFO  L275        PluginConnector]: Witness Printer initialized
[2022-11-19 06:55:10,481 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:54:39" (3/4) ...
[2022-11-19 06:55:10,484 INFO  L137         WitnessPrinter]: Generating witness for correct program
[2022-11-19 06:55:10,490 INFO  L361     RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not
[2022-11-19 06:55:10,490 INFO  L361     RCFGBacktranslator]: Ignoring RootEdge to procedure check
[2022-11-19 06:55:10,490 INFO  L361     RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert
[2022-11-19 06:55:10,498 INFO  L915   BoogieBacktranslator]: Reduced CFG by removing 31 nodes and edges
[2022-11-19 06:55:10,498 INFO  L915   BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges
[2022-11-19 06:55:10,498 INFO  L915   BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges
[2022-11-19 06:55:10,499 INFO  L915   BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges
[2022-11-19 06:55:10,539 INFO  L141         WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/witness.graphml
[2022-11-19 06:55:10,539 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2022-11-19 06:55:10,540 INFO  L158              Benchmark]: Toolchain (without parser) took 32127.28ms. Allocated memory was 94.4MB in the beginning and 232.8MB in the end (delta: 138.4MB). Free memory was 50.6MB in the beginning and 154.7MB in the end (delta: -104.1MB). Peak memory consumption was 35.2MB. Max. memory is 16.1GB.
[2022-11-19 06:55:10,540 INFO  L158              Benchmark]: CDTParser took 0.22ms. Allocated memory is still 94.4MB. Free memory is still 67.5MB. There was no memory consumed. Max. memory is 16.1GB.
[2022-11-19 06:55:10,541 INFO  L158              Benchmark]: CACSL2BoogieTranslator took 271.45ms. Allocated memory is still 94.4MB. Free memory was 50.4MB in the beginning and 68.8MB in the end (delta: -18.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB.
[2022-11-19 06:55:10,541 INFO  L158              Benchmark]: Boogie Procedure Inliner took 38.41ms. Allocated memory is still 94.4MB. Free memory was 68.8MB in the beginning and 67.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB.
[2022-11-19 06:55:10,541 INFO  L158              Benchmark]: Boogie Preprocessor took 45.24ms. Allocated memory is still 94.4MB. Free memory was 67.3MB in the beginning and 66.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2022-11-19 06:55:10,541 INFO  L158              Benchmark]: RCFGBuilder took 526.47ms. Allocated memory is still 94.4MB. Free memory was 66.0MB in the beginning and 48.1MB in the end (delta: 17.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB.
[2022-11-19 06:55:10,542 INFO  L158              Benchmark]: TraceAbstraction took 31173.17ms. Allocated memory was 94.4MB in the beginning and 232.8MB in the end (delta: 138.4MB). Free memory was 47.3MB in the beginning and 158.4MB in the end (delta: -111.1MB). Peak memory consumption was 28.6MB. Max. memory is 16.1GB.
[2022-11-19 06:55:10,542 INFO  L158              Benchmark]: Witness Printer took 59.22ms. Allocated memory is still 232.8MB. Free memory was 158.4MB in the beginning and 154.7MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB.
[2022-11-19 06:55:10,544 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.22ms. Allocated memory is still 94.4MB. Free memory is still 67.5MB. There was no memory consumed. Max. memory is 16.1GB.
 * CACSL2BoogieTranslator took 271.45ms. Allocated memory is still 94.4MB. Free memory was 50.4MB in the beginning and 68.8MB in the end (delta: -18.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB.
 * Boogie Procedure Inliner took 38.41ms. Allocated memory is still 94.4MB. Free memory was 68.8MB in the beginning and 67.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB.
 * Boogie Preprocessor took 45.24ms. Allocated memory is still 94.4MB. Free memory was 67.3MB in the beginning and 66.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
 * RCFGBuilder took 526.47ms. Allocated memory is still 94.4MB. Free memory was 66.0MB in the beginning and 48.1MB in the end (delta: 17.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB.
 * TraceAbstraction took 31173.17ms. Allocated memory was 94.4MB in the beginning and 232.8MB in the end (delta: 138.4MB). Free memory was 47.3MB in the beginning and 158.4MB in the end (delta: -111.1MB). Peak memory consumption was 28.6MB. Max. memory is 16.1GB.
 * Witness Printer took 59.22ms. Allocated memory is still 232.8MB. Free memory was 158.4MB in the beginning and 154.7MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - StatisticsResult: ErrorAutomatonStatistics
    NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
  - PositiveResult [Line: -1]: pointer dereference always succeeds
    For all program executions holds that pointer dereference always succeeds at this location
  - PositiveResult [Line: -1]: pointer dereference always succeeds
    For all program executions holds that pointer dereference always succeeds at this location
  - PositiveResult [Line: -1]: pointer dereference always succeeds
    For all program executions holds that pointer dereference always succeeds at this location
  - PositiveResult [Line: -1]: pointer dereference always succeeds
    For all program executions holds that pointer dereference always succeeds at this location
  - PositiveResult [Line: 52]: free always succeeds
    For all program executions holds that free always succeeds at this location
  - PositiveResult [Line: 52]: free always succeeds
    For all program executions holds that free always succeeds at this location
  - PositiveResult [Line: 52]: free always succeeds
    For all program executions holds that free always succeeds at this location
  - PositiveResult [Line: 40]: all allocated memory was freed
    For all program executions holds that all allocated memory was freed at this location
  - PositiveResult [Line: -1]: pointer dereference always succeeds
    For all program executions holds that pointer dereference always succeeds at this location
  - PositiveResult [Line: -1]: pointer dereference always succeeds
    For all program executions holds that pointer dereference always succeeds at this location
  - PositiveResult [Line: -1]: pointer dereference always succeeds
    For all program executions holds that pointer dereference always succeeds at this location
  - PositiveResult [Line: -1]: pointer dereference always succeeds
    For all program executions holds that pointer dereference always succeeds at this location
  - PositiveResult [Line: -1]: pointer dereference always succeeds
    For all program executions holds that pointer dereference always succeeds at this location
  - PositiveResult [Line: -1]: pointer dereference always succeeds
    For all program executions holds that pointer dereference always succeeds at this location
  - PositiveResult [Line: -1]: pointer dereference always succeeds
    For all program executions holds that pointer dereference always succeeds at this location
  - PositiveResult [Line: -1]: pointer dereference always succeeds
    For all program executions holds that pointer dereference always succeeds at this location
  - PositiveResult [Line: 11]: all allocated memory was freed
    For all program executions holds that all allocated memory was freed at this location
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 54 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 31.1s, OverallIterations: 17, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1089 SdHoareTripleChecker+Valid, 3.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1054 mSDsluCounter, 3092 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 411 IncrementalHoareTripleChecker+Unchecked, 2570 mSDsCounter, 345 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4053 IncrementalHoareTripleChecker+Invalid, 4809 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 345 mSolverCounterUnsat, 522 mSDtfsCounter, 4053 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 970 GetRequests, 587 SyntacticMatches, 28 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1941 ImplicationChecksByTransitivity, 13.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=14, InterpolantAutomatonStates: 212, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 63 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 15.4s InterpolantComputationTime, 878 NumberOfCodeBlocks, 878 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1170 ConstructedInterpolants, 47 QuantifiedInterpolants, 9175 SizeOfPredicates, 127 NumberOfNonLiveVariables, 1918 ConjunctsInSsa, 243 ConjunctsInUnsatCore, 36 InterpolantComputations, 8 PerfectInterpolantSequences, 412/543 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.9s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 20, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 15, TOOLS_POST_TIME: 0.2s, TOOLS_POST_CALL_APPLICATIONS: 13, TOOLS_POST_CALL_TIME: 0.4s, TOOLS_POST_RETURN_APPLICATIONS: 8, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 36, TOOLS_QUANTIFIERELIM_TIME: 0.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 55, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 12, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 20, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 8, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 137, DAG_COMPRESSION_RETAINED_NODES: 61, ReuseStatistics: No data available
  - AllSpecificationsHoldResult: All specifications hold
    17 specifications checked. All of them hold
RESULT: Ultimate proved your program to be correct!
[2022-11-19 06:55:10,571 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f836f651-8746-4e6a-8942-f80d293daff7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...
--- End real Ultimate output ---

Execution finished normally
Writing output log to file Ultimate.log
Result:
TRUE