/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem01_label38.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-03-31 21:10:52,964 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-03-31 21:10:52,965 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-03-31 21:10:52,988 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-03-31 21:10:52,988 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-03-31 21:10:52,989 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-03-31 21:10:52,990 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-03-31 21:10:52,992 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-03-31 21:10:52,993 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-03-31 21:10:52,994 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-03-31 21:10:52,994 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-03-31 21:10:52,995 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-03-31 21:10:52,996 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-03-31 21:10:52,998 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-03-31 21:10:52,998 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-03-31 21:10:52,999 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-03-31 21:10:53,000 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-03-31 21:10:53,002 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
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[2023-03-31 21:10:53,010 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-03-31 21:10:53,011 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-03-31 21:10:53,013 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-03-31 21:10:53,014 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2023-03-31 21:10:53,015 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-03-31 21:10:53,016 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2023-03-31 21:10:53,017 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-03-31 21:10:53,017 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-03-31 21:10:53,018 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-03-31 21:10:53,018 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2023-03-31 21:10:53,019 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-03-31 21:10:53,027 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-03-31 21:10:53,028 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2023-03-31 21:10:53,061 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-03-31 21:10:53,062 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-03-31 21:10:53,062 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-03-31 21:10:53,062 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-03-31 21:10:53,063 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-03-31 21:10:53,063 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-03-31 21:10:53,064 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-03-31 21:10:53,064 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-03-31 21:10:53,064 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-03-31 21:10:53,064 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-03-31 21:10:53,065 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-03-31 21:10:53,065 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-03-31 21:10:53,065 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-03-31 21:10:53,065 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-03-31 21:10:53,065 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-03-31 21:10:53,066 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-03-31 21:10:53,066 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-03-31 21:10:53,066 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-03-31 21:10:53,066 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-03-31 21:10:53,067 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-03-31 21:10:53,067 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-03-31 21:10:53,067 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-03-31 21:10:53,067 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-03-31 21:10:53,067 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-03-31 21:10:53,067 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-03-31 21:10:53,068 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-03-31 21:10:53,068 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-03-31 21:10:53,068 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-03-31 21:10:53,068 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-03-31 21:10:53,068 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-03-31 21:10:53,069 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-03-31 21:10:53,069 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-03-31 21:10:53,069 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 21:10:53,069 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-03-31 21:10:53,069 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-03-31 21:10:53,069 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-03-31 21:10:53,070 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-03-31 21:10:53,070 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-03-31 21:10:53,070 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-03-31 21:10:53,070 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-03-31 21:10:53,070 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-03-31 21:10:53,070 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain
[2023-03-31 21:10:53,335 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-03-31 21:10:53,361 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-03-31 21:10:53,365 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-03-31 21:10:53,367 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-03-31 21:10:53,367 INFO  L275        PluginConnector]: CDTParser initialized
[2023-03-31 21:10:53,368 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label38.c
[2023-03-31 21:10:54,583 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-03-31 21:10:54,869 INFO  L351              CDTParser]: Found 1 translation units.
[2023-03-31 21:10:54,869 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label38.c
[2023-03-31 21:10:54,881 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/768e23532/6f3def7dad7f443ea8ac4e992088a275/FLAGdf66c6b48
[2023-03-31 21:10:54,897 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/768e23532/6f3def7dad7f443ea8ac4e992088a275
[2023-03-31 21:10:54,900 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-03-31 21:10:54,902 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-03-31 21:10:54,903 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-03-31 21:10:54,903 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-03-31 21:10:54,909 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-03-31 21:10:54,910 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:10:54" (1/1) ...
[2023-03-31 21:10:54,911 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4bfb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:10:54, skipping insertion in model container
[2023-03-31 21:10:54,912 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:10:54" (1/1) ...
[2023-03-31 21:10:54,918 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-03-31 21:10:54,965 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-03-31 21:10:55,198 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label38.c[15751,15764]
[2023-03-31 21:10:55,252 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 21:10:55,269 INFO  L203         MainTranslator]: Completed pre-run
[2023-03-31 21:10:55,351 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label38.c[15751,15764]
[2023-03-31 21:10:55,373 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 21:10:55,389 INFO  L208         MainTranslator]: Completed translation
[2023-03-31 21:10:55,389 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:10:55 WrapperNode
[2023-03-31 21:10:55,390 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-03-31 21:10:55,391 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-03-31 21:10:55,391 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-03-31 21:10:55,391 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-03-31 21:10:55,401 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:10:55" (1/1) ...
[2023-03-31 21:10:55,401 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:10:55" (1/1) ...
[2023-03-31 21:10:55,417 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:10:55" (1/1) ...
[2023-03-31 21:10:55,418 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:10:55" (1/1) ...
[2023-03-31 21:10:55,449 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:10:55" (1/1) ...
[2023-03-31 21:10:55,459 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:10:55" (1/1) ...
[2023-03-31 21:10:55,464 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:10:55" (1/1) ...
[2023-03-31 21:10:55,469 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:10:55" (1/1) ...
[2023-03-31 21:10:55,477 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-03-31 21:10:55,478 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-03-31 21:10:55,478 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-03-31 21:10:55,478 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-03-31 21:10:55,479 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:10:55" (1/1) ...
[2023-03-31 21:10:55,501 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 21:10:55,510 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 21:10:55,524 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-03-31 21:10:55,535 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-03-31 21:10:55,565 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-03-31 21:10:55,566 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-03-31 21:10:55,566 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-03-31 21:10:55,567 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-03-31 21:10:55,567 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-03-31 21:10:55,567 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-03-31 21:10:55,567 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-03-31 21:10:55,568 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-03-31 21:10:55,568 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-03-31 21:10:55,568 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-03-31 21:10:55,568 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-03-31 21:10:55,568 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-03-31 21:10:55,568 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-03-31 21:10:55,569 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-03-31 21:10:55,569 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-03-31 21:10:55,569 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-03-31 21:10:55,569 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-03-31 21:10:55,569 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-03-31 21:10:55,569 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-03-31 21:10:55,680 INFO  L236             CfgBuilder]: Building ICFG
[2023-03-31 21:10:55,682 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-03-31 21:10:56,521 INFO  L277             CfgBuilder]: Performing block encoding
[2023-03-31 21:10:56,789 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-03-31 21:10:56,789 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-03-31 21:10:56,792 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:10:56 BoogieIcfgContainer
[2023-03-31 21:10:56,792 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-03-31 21:10:56,798 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-03-31 21:10:56,798 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-03-31 21:10:56,801 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-03-31 21:10:56,801 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:10:54" (1/3) ...
[2023-03-31 21:10:56,802 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3e0119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:10:56, skipping insertion in model container
[2023-03-31 21:10:56,802 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:10:55" (2/3) ...
[2023-03-31 21:10:56,802 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3e0119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:10:56, skipping insertion in model container
[2023-03-31 21:10:56,802 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:10:56" (3/3) ...
[2023-03-31 21:10:56,804 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem01_label38.c
[2023-03-31 21:10:56,820 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-03-31 21:10:56,821 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-03-31 21:10:56,874 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-03-31 21:10:56,879 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2ce996a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-03-31 21:10:56,880 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-03-31 21:10:56,883 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2023-03-31 21:10:56,893 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 78
[2023-03-31 21:10:56,893 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 21:10:56,893 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 21:10:56,894 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 21:10:56,900 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 21:10:56,900 INFO  L85        PathProgramCache]: Analyzing trace with hash 1124004093, now seen corresponding path program 1 times
[2023-03-31 21:10:56,907 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 21:10:56,908 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183448647]
[2023-03-31 21:10:56,908 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 21:10:56,908 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 21:10:57,037 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 21:10:57,397 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 21:10:57,398 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 21:10:57,398 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183448647]
[2023-03-31 21:10:57,401 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183448647] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 21:10:57,401 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 21:10:57,401 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-03-31 21:10:57,402 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634335298]
[2023-03-31 21:10:57,403 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 21:10:57,407 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-03-31 21:10:57,407 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 21:10:57,442 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-03-31 21:10:57,443 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-03-31 21:10:57,445 INFO  L87              Difference]: Start difference. First operand  has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand  has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-31 21:10:57,829 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 21:10:57,829 INFO  L93              Difference]: Finished difference Result 246 states and 454 transitions.
[2023-03-31 21:10:57,831 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-03-31 21:10:57,832 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77
[2023-03-31 21:10:57,833 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 21:10:57,844 INFO  L225             Difference]: With dead ends: 246
[2023-03-31 21:10:57,845 INFO  L226             Difference]: Without dead ends: 157
[2023-03-31 21:10:57,849 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-03-31 21:10:57,853 INFO  L413           NwaCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-03-31 21:10:57,854 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 48 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-03-31 21:10:57,873 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 157 states.
[2023-03-31 21:10:57,913 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157.
[2023-03-31 21:10:57,916 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 157 states, 149 states have (on average 1.7718120805369129) internal successors, (264), 149 states have internal predecessors, (264), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5)
[2023-03-31 21:10:57,922 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 273 transitions.
[2023-03-31 21:10:57,924 INFO  L78                 Accepts]: Start accepts. Automaton has 157 states and 273 transitions. Word has length 77
[2023-03-31 21:10:57,925 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 21:10:57,925 INFO  L495      AbstractCegarLoop]: Abstraction has 157 states and 273 transitions.
[2023-03-31 21:10:57,926 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-31 21:10:57,926 INFO  L276                IsEmpty]: Start isEmpty. Operand 157 states and 273 transitions.
[2023-03-31 21:10:57,932 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 87
[2023-03-31 21:10:57,932 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 21:10:57,932 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 21:10:57,933 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-03-31 21:10:57,933 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 21:10:57,934 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 21:10:57,934 INFO  L85        PathProgramCache]: Analyzing trace with hash -1659987569, now seen corresponding path program 1 times
[2023-03-31 21:10:57,934 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 21:10:57,934 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330782297]
[2023-03-31 21:10:57,934 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 21:10:57,935 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 21:10:57,979 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 21:10:58,247 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 21:10:58,248 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 21:10:58,248 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330782297]
[2023-03-31 21:10:58,248 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330782297] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 21:10:58,249 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 21:10:58,249 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-03-31 21:10:58,249 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967483625]
[2023-03-31 21:10:58,249 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 21:10:58,251 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 21:10:58,251 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 21:10:58,252 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 21:10:58,252 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-03-31 21:10:58,253 INFO  L87              Difference]: Start difference. First operand 157 states and 273 transitions. Second operand  has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 21:10:58,648 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 21:10:58,648 INFO  L93              Difference]: Finished difference Result 485 states and 861 transitions.
[2023-03-31 21:10:58,649 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-03-31 21:10:58,649 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 86
[2023-03-31 21:10:58,649 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 21:10:58,652 INFO  L225             Difference]: With dead ends: 485
[2023-03-31 21:10:58,653 INFO  L226             Difference]: Without dead ends: 333
[2023-03-31 21:10:58,654 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2023-03-31 21:10:58,655 INFO  L413           NwaCegarLoop]: 15 mSDtfsCounter, 297 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-03-31 21:10:58,655 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 44 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-03-31 21:10:58,656 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 333 states.
[2023-03-31 21:10:58,675 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 315.
[2023-03-31 21:10:58,676 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 315 states, 299 states have (on average 1.648829431438127) internal successors, (493), 303 states have internal predecessors, (493), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21)
[2023-03-31 21:10:58,677 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 520 transitions.
[2023-03-31 21:10:58,678 INFO  L78                 Accepts]: Start accepts. Automaton has 315 states and 520 transitions. Word has length 86
[2023-03-31 21:10:58,678 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 21:10:58,678 INFO  L495      AbstractCegarLoop]: Abstraction has 315 states and 520 transitions.
[2023-03-31 21:10:58,678 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 21:10:58,678 INFO  L276                IsEmpty]: Start isEmpty. Operand 315 states and 520 transitions.
[2023-03-31 21:10:58,685 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 91
[2023-03-31 21:10:58,685 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 21:10:58,686 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 21:10:58,686 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-03-31 21:10:58,687 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 21:10:58,687 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 21:10:58,687 INFO  L85        PathProgramCache]: Analyzing trace with hash 56776327, now seen corresponding path program 1 times
[2023-03-31 21:10:58,687 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 21:10:58,687 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791755241]
[2023-03-31 21:10:58,687 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 21:10:58,688 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 21:10:58,716 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 21:10:58,946 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 21:10:58,947 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 21:10:58,947 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791755241]
[2023-03-31 21:10:58,947 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791755241] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 21:10:58,947 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 21:10:58,947 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-03-31 21:10:58,947 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040912280]
[2023-03-31 21:10:58,948 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 21:10:58,948 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 21:10:58,948 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 21:10:58,950 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 21:10:58,950 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-03-31 21:10:58,950 INFO  L87              Difference]: Start difference. First operand 315 states and 520 transitions. Second operand  has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 21:10:59,343 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 21:10:59,344 INFO  L93              Difference]: Finished difference Result 973 states and 1695 transitions.
[2023-03-31 21:10:59,344 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-03-31 21:10:59,345 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 90
[2023-03-31 21:10:59,346 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 21:10:59,354 INFO  L225             Difference]: With dead ends: 973
[2023-03-31 21:10:59,354 INFO  L226             Difference]: Without dead ends: 663
[2023-03-31 21:10:59,360 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2023-03-31 21:10:59,366 INFO  L413           NwaCegarLoop]: 15 mSDtfsCounter, 263 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-03-31 21:10:59,368 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 39 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-03-31 21:10:59,371 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 663 states.
[2023-03-31 21:10:59,428 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 637.
[2023-03-31 21:10:59,429 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 637 states, 602 states have (on average 1.6046511627906976) internal successors, (966), 617 states have internal predecessors, (966), 10 states have call successors, (10), 10 states have call predecessors, (10), 24 states have return successors, (79), 9 states have call predecessors, (79), 9 states have call successors, (79)
[2023-03-31 21:10:59,433 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1055 transitions.
[2023-03-31 21:10:59,433 INFO  L78                 Accepts]: Start accepts. Automaton has 637 states and 1055 transitions. Word has length 90
[2023-03-31 21:10:59,434 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 21:10:59,434 INFO  L495      AbstractCegarLoop]: Abstraction has 637 states and 1055 transitions.
[2023-03-31 21:10:59,434 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 21:10:59,434 INFO  L276                IsEmpty]: Start isEmpty. Operand 637 states and 1055 transitions.
[2023-03-31 21:10:59,438 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 95
[2023-03-31 21:10:59,438 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 21:10:59,439 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 21:10:59,439 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-03-31 21:10:59,439 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 21:10:59,441 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 21:10:59,441 INFO  L85        PathProgramCache]: Analyzing trace with hash -1608723585, now seen corresponding path program 1 times
[2023-03-31 21:10:59,441 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 21:10:59,441 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936141763]
[2023-03-31 21:10:59,441 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 21:10:59,441 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 21:10:59,470 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 21:10:59,787 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 21:10:59,788 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 21:10:59,788 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936141763]
[2023-03-31 21:10:59,788 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936141763] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 21:10:59,790 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 21:10:59,790 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-03-31 21:10:59,790 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573912128]
[2023-03-31 21:10:59,791 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 21:10:59,792 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 21:10:59,792 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 21:10:59,792 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 21:10:59,792 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-03-31 21:10:59,793 INFO  L87              Difference]: Start difference. First operand 637 states and 1055 transitions. Second operand  has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 21:11:00,232 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 21:11:00,233 INFO  L93              Difference]: Finished difference Result 1388 states and 2341 transitions.
[2023-03-31 21:11:00,233 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-03-31 21:11:00,233 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94
[2023-03-31 21:11:00,234 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 21:11:00,237 INFO  L225             Difference]: With dead ends: 1388
[2023-03-31 21:11:00,237 INFO  L226             Difference]: Without dead ends: 756
[2023-03-31 21:11:00,239 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2023-03-31 21:11:00,239 INFO  L413           NwaCegarLoop]: 15 mSDtfsCounter, 241 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-03-31 21:11:00,240 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 44 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-03-31 21:11:00,241 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 756 states.
[2023-03-31 21:11:00,262 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 740.
[2023-03-31 21:11:00,264 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 740 states, 689 states have (on average 1.5021770682148041) internal successors, (1035), 718 states have internal predecessors, (1035), 11 states have call successors, (11), 11 states have call predecessors, (11), 39 states have return successors, (113), 10 states have call predecessors, (113), 10 states have call successors, (113)
[2023-03-31 21:11:00,267 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1159 transitions.
[2023-03-31 21:11:00,267 INFO  L78                 Accepts]: Start accepts. Automaton has 740 states and 1159 transitions. Word has length 94
[2023-03-31 21:11:00,267 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 21:11:00,267 INFO  L495      AbstractCegarLoop]: Abstraction has 740 states and 1159 transitions.
[2023-03-31 21:11:00,268 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 21:11:00,268 INFO  L276                IsEmpty]: Start isEmpty. Operand 740 states and 1159 transitions.
[2023-03-31 21:11:00,269 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 97
[2023-03-31 21:11:00,269 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 21:11:00,270 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 21:11:00,270 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-03-31 21:11:00,270 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 21:11:00,270 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 21:11:00,270 INFO  L85        PathProgramCache]: Analyzing trace with hash 412260859, now seen corresponding path program 1 times
[2023-03-31 21:11:00,271 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 21:11:00,271 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314650445]
[2023-03-31 21:11:00,271 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 21:11:00,271 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 21:11:00,292 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 21:11:00,630 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 21:11:00,630 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 21:11:00,631 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314650445]
[2023-03-31 21:11:00,631 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314650445] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 21:11:00,631 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 21:11:00,631 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-03-31 21:11:00,632 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023815447]
[2023-03-31 21:11:00,632 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 21:11:00,633 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 21:11:00,633 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 21:11:00,634 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 21:11:00,634 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-03-31 21:11:00,634 INFO  L87              Difference]: Start difference. First operand 740 states and 1159 transitions. Second operand  has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 21:11:01,056 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 21:11:01,057 INFO  L93              Difference]: Finished difference Result 1742 states and 2746 transitions.
[2023-03-31 21:11:01,057 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-03-31 21:11:01,057 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 96
[2023-03-31 21:11:01,058 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 21:11:01,062 INFO  L225             Difference]: With dead ends: 1742
[2023-03-31 21:11:01,062 INFO  L226             Difference]: Without dead ends: 1007
[2023-03-31 21:11:01,064 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2023-03-31 21:11:01,066 INFO  L413           NwaCegarLoop]: 20 mSDtfsCounter, 207 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-03-31 21:11:01,068 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 52 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-03-31 21:11:01,069 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1007 states.
[2023-03-31 21:11:01,103 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 991.
[2023-03-31 21:11:01,105 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 991 states, 921 states have (on average 1.4147665580890336) internal successors, (1303), 963 states have internal predecessors, (1303), 14 states have call successors, (14), 14 states have call predecessors, (14), 55 states have return successors, (168), 13 states have call predecessors, (168), 13 states have call successors, (168)
[2023-03-31 21:11:01,108 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1485 transitions.
[2023-03-31 21:11:01,109 INFO  L78                 Accepts]: Start accepts. Automaton has 991 states and 1485 transitions. Word has length 96
[2023-03-31 21:11:01,109 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 21:11:01,109 INFO  L495      AbstractCegarLoop]: Abstraction has 991 states and 1485 transitions.
[2023-03-31 21:11:01,109 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 21:11:01,109 INFO  L276                IsEmpty]: Start isEmpty. Operand 991 states and 1485 transitions.
[2023-03-31 21:11:01,112 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 108
[2023-03-31 21:11:01,112 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 21:11:01,112 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 21:11:01,112 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-03-31 21:11:01,112 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 21:11:01,113 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 21:11:01,113 INFO  L85        PathProgramCache]: Analyzing trace with hash 885081133, now seen corresponding path program 1 times
[2023-03-31 21:11:01,113 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 21:11:01,113 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33775010]
[2023-03-31 21:11:01,113 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 21:11:01,113 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 21:11:01,139 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 21:11:01,255 INFO  L134       CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 21:11:01,255 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 21:11:01,256 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33775010]
[2023-03-31 21:11:01,256 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33775010] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 21:11:01,256 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262943570]
[2023-03-31 21:11:01,256 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 21:11:01,256 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 21:11:01,257 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 21:11:01,265 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-03-31 21:11:01,302 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-03-31 21:11:01,419 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 21:11:01,422 INFO  L262         TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-03-31 21:11:01,429 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 21:11:01,572 INFO  L134       CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 21:11:01,572 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-31 21:11:01,767 INFO  L134       CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 21:11:01,767 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262943570] provided 0 perfect and 2 imperfect interpolant sequences
[2023-03-31 21:11:01,767 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [750951910]
[2023-03-31 21:11:01,790 INFO  L159        IcfgInterpreter]: Started Sifa with 81 locations of interest
[2023-03-31 21:11:01,790 INFO  L166        IcfgInterpreter]: Building call graph
[2023-03-31 21:11:01,794 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-03-31 21:11:01,799 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-03-31 21:11:01,799 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-03-31 21:11:02,139 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs
[2023-03-31 21:11:03,341 INFO  L197        IcfgInterpreter]: Interpreting procedure calculate_output with input of size 83 for LOIs
[2023-03-31 21:11:52,280 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 12
[2023-03-31 21:11:54,484 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 372096 conjuctions. This might take some time...