/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem18_label04.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 10:28:50,757 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 10:28:50,759 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-04-01 10:28:50,792 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-04-01 10:28:50,792 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 10:28:50,795 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 10:28:50,798 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 10:28:50,800 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-01 10:28:50,802 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-01 10:28:50,807 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 10:28:50,807 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-01 10:28:50,808 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-01 10:28:50,808 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-01 10:28:50,809 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-04-01 10:28:50,810 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-01 10:28:50,811 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 10:28:50,811 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 10:28:50,812 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 10:28:50,813 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 10:28:50,815 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-01 10:28:50,816 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-01 10:28:50,819 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-01 10:28:50,821 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 10:28:50,823 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 10:28:50,832 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2023-04-01 10:28:50,833 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2023-04-01 10:28:50,833 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-04-01 10:28:50,834 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2023-04-01 10:28:50,834 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2023-04-01 10:28:50,835 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-04-01 10:28:50,836 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-04-01 10:28:50,836 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-04-01 10:28:50,837 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-01 10:28:50,837 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-01 10:28:50,838 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-04-01 10:28:50,838 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2023-04-01 10:28:50,838 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2023-04-01 10:28:50,838 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2023-04-01 10:28:50,838 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2023-04-01 10:28:50,839 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2023-04-01 10:28:50,839 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 10:28:50,840 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
[2023-04-01 10:28:50,867 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 10:28:50,867 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 10:28:50,868 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 10:28:50,868 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 10:28:50,869 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 10:28:50,869 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 10:28:50,869 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 10:28:50,869 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 10:28:50,869 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 10:28:50,869 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 10:28:50,870 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 10:28:50,870 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 10:28:50,870 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 10:28:50,870 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 10:28:50,870 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 10:28:50,871 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 10:28:50,871 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 10:28:50,871 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 10:28:50,871 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 10:28:50,871 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 10:28:50,872 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 10:28:50,872 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 10:28:50,872 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 10:28:50,872 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 10:28:50,872 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 10:28:50,872 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 10:28:50,872 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 10:28:50,872 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 10:28:50,873 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 10:28:50,873 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 10:28:50,873 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 10:28:50,873 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 10:28:50,873 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:28:50,873 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 10:28:50,873 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 10:28:50,874 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 10:28:50,874 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 10:28:50,874 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 10:28:50,874 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 10:28:50,874 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 10:28:50,874 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 10:28:50,874 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 10:28:51,105 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 10:28:51,121 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 10:28:51,123 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 10:28:51,124 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 10:28:51,125 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 10:28:51,126 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label04.c
[2023-04-01 10:28:52,290 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 10:28:52,667 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 10:28:52,668 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label04.c
[2023-04-01 10:28:52,696 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d32c1b39/fd14a87c09d24423a7ad6221d485c327/FLAG713d0ee0c
[2023-04-01 10:28:52,711 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d32c1b39/fd14a87c09d24423a7ad6221d485c327
[2023-04-01 10:28:52,715 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 10:28:52,716 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 10:28:52,719 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 10:28:52,719 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 10:28:52,722 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 10:28:52,722 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:28:52" (1/1) ...
[2023-04-01 10:28:52,723 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41674954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:28:52, skipping insertion in model container
[2023-04-01 10:28:52,724 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:28:52" (1/1) ...
[2023-04-01 10:28:52,729 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 10:28:52,814 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 10:28:53,014 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/Problem18_label04.c[5507,5520]
[2023-04-01 10:28:53,576 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:28:53,587 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 10:28:53,610 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/Problem18_label04.c[5507,5520]
[2023-04-01 10:28:53,855 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:28:53,873 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 10:28:53,874 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:28:53 WrapperNode
[2023-04-01 10:28:53,874 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 10:28:53,875 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 10:28:53,875 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 10:28:53,875 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 10:28:53,885 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:28:53" (1/1) ...
[2023-04-01 10:28:53,885 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:28:53" (1/1) ...
[2023-04-01 10:28:53,925 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:28:53" (1/1) ...
[2023-04-01 10:28:53,925 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:28:53" (1/1) ...
[2023-04-01 10:28:53,991 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:28:53" (1/1) ...
[2023-04-01 10:28:54,019 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:28:53" (1/1) ...
[2023-04-01 10:28:54,048 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:28:53" (1/1) ...
[2023-04-01 10:28:54,066 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:28:53" (1/1) ...
[2023-04-01 10:28:54,083 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 10:28:54,084 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 10:28:54,084 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 10:28:54,084 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 10:28:54,085 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:28:53" (1/1) ...
[2023-04-01 10:28:54,092 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:28:54,100 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:28:54,112 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)
[2023-04-01 10:28:54,134 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
[2023-04-01 10:28:54,149 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 10:28:54,149 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 10:28:54,149 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 10:28:54,149 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 10:28:54,150 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 10:28:54,150 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-04-01 10:28:54,150 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 10:28:54,150 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 10:28:54,150 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 10:28:54,150 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-04-01 10:28:54,150 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 10:28:54,150 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 10:28:54,150 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 10:28:54,150 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 10:28:54,150 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 10:28:54,151 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 10:28:54,151 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 10:28:54,151 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 10:28:54,151 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 10:28:54,151 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 10:28:54,152 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 10:28:54,152 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 10:28:54,152 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 10:28:54,239 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 10:28:54,241 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 10:28:56,944 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 10:29:03,420 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 10:29:03,420 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 10:29:03,423 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:29:03 BoogieIcfgContainer
[2023-04-01 10:29:03,423 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 10:29:03,426 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 10:29:03,426 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 10:29:03,428 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 10:29:03,428 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:28:52" (1/3) ...
[2023-04-01 10:29:03,429 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159c1a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:29:03, skipping insertion in model container
[2023-04-01 10:29:03,429 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:28:53" (2/3) ...
[2023-04-01 10:29:03,429 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159c1a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:29:03, skipping insertion in model container
[2023-04-01 10:29:03,429 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:29:03" (3/3) ...
[2023-04-01 10:29:03,430 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem18_label04.c
[2023-04-01 10:29:03,446 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 10:29:03,446 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 10:29:03,499 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 10:29:03,506 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@47973f22, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 10:29:03,506 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 10:29:03,515 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2023-04-01 10:29:03,520 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 10:29:03,520 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:29:03,521 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:29:03,522 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:29:03,526 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:29:03,526 INFO  L85        PathProgramCache]: Analyzing trace with hash 314234883, now seen corresponding path program 1 times
[2023-04-01 10:29:03,534 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:29:03,534 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191887075]
[2023-04-01 10:29:03,534 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:29:03,535 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:29:03,666 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:29:03,852 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:29:03,853 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:29:03,853 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191887075]
[2023-04-01 10:29:03,853 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191887075] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:29:03,853 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:29:03,854 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:29:03,855 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066335973]
[2023-04-01 10:29:03,855 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:29:03,859 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:29:03,859 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:29:03,895 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:29:03,896 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:29:03,899 INFO  L87              Difference]: Start difference. First operand  has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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)
[2023-04-01 10:29:05,951 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:29:05,952 INFO  L93              Difference]: Finished difference Result 1393 states and 2727 transitions.
[2023-04-01 10:29:05,953 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:29:05,954 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11
[2023-04-01 10:29:05,955 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:29:05,972 INFO  L225             Difference]: With dead ends: 1393
[2023-04-01 10:29:05,972 INFO  L226             Difference]: Without dead ends: 921
[2023-04-01 10:29:05,980 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
[2023-04-01 10:29:05,983 INFO  L413           NwaCegarLoop]: 346 mSDtfsCounter, 472 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time
[2023-04-01 10:29:05,984 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 366 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time]
[2023-04-01 10:29:06,005 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 921 states.
[2023-04-01 10:29:06,073 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919.
[2023-04-01 10:29:06,076 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 919 states, 905 states have (on average 1.6209944751381216) internal successors, (1467), 905 states have internal predecessors, (1467), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10)
[2023-04-01 10:29:06,080 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1484 transitions.
[2023-04-01 10:29:06,081 INFO  L78                 Accepts]: Start accepts. Automaton has 919 states and 1484 transitions. Word has length 11
[2023-04-01 10:29:06,081 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:29:06,082 INFO  L495      AbstractCegarLoop]: Abstraction has 919 states and 1484 transitions.
[2023-04-01 10:29:06,082 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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)
[2023-04-01 10:29:06,082 INFO  L276                IsEmpty]: Start isEmpty. Operand 919 states and 1484 transitions.
[2023-04-01 10:29:06,083 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2023-04-01 10:29:06,083 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:29:06,083 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:29:06,084 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 10:29:06,084 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:29:06,084 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:29:06,084 INFO  L85        PathProgramCache]: Analyzing trace with hash -1167398618, now seen corresponding path program 1 times
[2023-04-01 10:29:06,085 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:29:06,085 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3974410]
[2023-04-01 10:29:06,085 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:29:06,085 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:29:06,104 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:29:06,283 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:29:06,284 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:29:06,284 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3974410]
[2023-04-01 10:29:06,284 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3974410] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:29:06,284 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:29:06,284 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:29:06,284 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050131193]
[2023-04-01 10:29:06,285 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:29:06,286 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:29:06,286 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:29:06,286 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:29:06,286 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:29:06,287 INFO  L87              Difference]: Start difference. First operand 919 states and 1484 transitions. Second operand  has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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)
[2023-04-01 10:29:09,321 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:29:09,321 INFO  L93              Difference]: Finished difference Result 2795 states and 4544 transitions.
[2023-04-01 10:29:09,322 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-04-01 10:29:09,322 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22
[2023-04-01 10:29:09,322 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:29:09,335 INFO  L225             Difference]: With dead ends: 2795
[2023-04-01 10:29:09,335 INFO  L226             Difference]: Without dead ends: 1881
[2023-04-01 10:29:09,341 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
[2023-04-01 10:29:09,344 INFO  L413           NwaCegarLoop]: 35 mSDtfsCounter, 1520 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3161 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 3161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time
[2023-04-01 10:29:09,347 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1520 Valid, 94 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 3161 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time]
[2023-04-01 10:29:09,352 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1881 states.
[2023-04-01 10:29:09,418 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1843.
[2023-04-01 10:29:09,422 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1843 states, 1809 states have (on average 1.4145936981757876) internal successors, (2559), 1816 states have internal predecessors, (2559), 11 states have call successors, (11), 11 states have call predecessors, (11), 22 states have return successors, (54), 15 states have call predecessors, (54), 10 states have call successors, (54)
[2023-04-01 10:29:09,431 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2624 transitions.
[2023-04-01 10:29:09,431 INFO  L78                 Accepts]: Start accepts. Automaton has 1843 states and 2624 transitions. Word has length 22
[2023-04-01 10:29:09,431 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:29:09,431 INFO  L495      AbstractCegarLoop]: Abstraction has 1843 states and 2624 transitions.
[2023-04-01 10:29:09,432 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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)
[2023-04-01 10:29:09,432 INFO  L276                IsEmpty]: Start isEmpty. Operand 1843 states and 2624 transitions.
[2023-04-01 10:29:09,433 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2023-04-01 10:29:09,433 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:29:09,433 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:29:09,433 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 10:29:09,433 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:29:09,434 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:29:09,434 INFO  L85        PathProgramCache]: Analyzing trace with hash 1950699656, now seen corresponding path program 1 times
[2023-04-01 10:29:09,434 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:29:09,434 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853811965]
[2023-04-01 10:29:09,434 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:29:09,434 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:29:09,468 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:29:09,661 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-04-01 10:29:09,661 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:29:09,662 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853811965]
[2023-04-01 10:29:09,662 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853811965] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:29:09,662 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996230886]
[2023-04-01 10:29:09,662 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:29:09,663 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:29:09,663 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:29:09,666 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)
[2023-04-01 10:29:09,667 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-01 10:29:09,759 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:29:09,763 INFO  L262         TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-04-01 10:29:09,768 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:29:09,872 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 10:29:09,872 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-04-01 10:29:09,872 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [996230886] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:29:09,872 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-04-01 10:29:09,872 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8
[2023-04-01 10:29:09,873 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675447379]
[2023-04-01 10:29:09,873 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:29:09,873 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:29:09,873 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:29:09,874 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:29:09,874 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2023-04-01 10:29:09,874 INFO  L87              Difference]: Start difference. First operand 1843 states and 2624 transitions. Second operand  has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 10:29:12,694 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:29:12,695 INFO  L93              Difference]: Finished difference Result 5615 states and 8140 transitions.
[2023-04-01 10:29:12,695 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:29:12,695 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32
[2023-04-01 10:29:12,696 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:29:12,710 INFO  L225             Difference]: With dead ends: 5615
[2023-04-01 10:29:12,710 INFO  L226             Difference]: Without dead ends: 3777
[2023-04-01 10:29:12,714 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2023-04-01 10:29:12,715 INFO  L413           NwaCegarLoop]: 21 mSDtfsCounter, 1572 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time
[2023-04-01 10:29:12,715 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 59 Invalid, 3460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time]
[2023-04-01 10:29:12,718 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3777 states.
[2023-04-01 10:29:12,788 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3658.
[2023-04-01 10:29:12,794 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3658 states, 3573 states have (on average 1.2549678141617688) internal successors, (4484), 3601 states have internal predecessors, (4484), 19 states have call successors, (19), 19 states have call predecessors, (19), 65 states have return successors, (195), 37 states have call predecessors, (195), 18 states have call successors, (195)
[2023-04-01 10:29:12,810 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 4698 transitions.
[2023-04-01 10:29:12,810 INFO  L78                 Accepts]: Start accepts. Automaton has 3658 states and 4698 transitions. Word has length 32
[2023-04-01 10:29:12,810 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:29:12,810 INFO  L495      AbstractCegarLoop]: Abstraction has 3658 states and 4698 transitions.
[2023-04-01 10:29:12,811 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 10:29:12,811 INFO  L276                IsEmpty]: Start isEmpty. Operand 3658 states and 4698 transitions.
[2023-04-01 10:29:12,819 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 89
[2023-04-01 10:29:12,819 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:29:12,819 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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]
[2023-04-01 10:29:12,829 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2023-04-01 10:29:13,024 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:29:13,025 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:29:13,025 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:29:13,025 INFO  L85        PathProgramCache]: Analyzing trace with hash 1133085012, now seen corresponding path program 1 times
[2023-04-01 10:29:13,026 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:29:13,026 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258999938]
[2023-04-01 10:29:13,026 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:29:13,026 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:29:13,062 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:29:13,239 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:29:13,239 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:29:13,239 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258999938]
[2023-04-01 10:29:13,240 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258999938] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:29:13,240 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265973332]
[2023-04-01 10:29:13,240 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:29:13,240 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:29:13,240 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:29:13,242 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-01 10:29:13,253 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-04-01 10:29:13,352 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:29:13,354 INFO  L262         TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 10:29:13,357 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:29:13,411 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:29:13,411 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 10:29:13,506 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:29:13,507 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265973332] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 10:29:13,507 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2088735796]
[2023-04-01 10:29:13,578 INFO  L159        IcfgInterpreter]: Started Sifa with 70 locations of interest
[2023-04-01 10:29:13,578 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 10:29:13,583 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 10:29:13,587 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 10:29:13,587 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 10:29:13,901 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs
[2023-04-01 10:29:14,158 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 46
[2023-04-01 10:29:16,824 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 15
[2023-04-01 10:29:17,348 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 106038 conjuctions. This might take some time...