/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/Problem15_label08.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-03-31 22:10:53,567 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-03-31 22:10:53,569 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-03-31 22:10:53,591 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-03-31 22:10:53,591 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-03-31 22:10:53,592 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-03-31 22:10:53,593 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-03-31 22:10:53,594 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-03-31 22:10:53,595 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-03-31 22:10:53,595 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-03-31 22:10:53,596 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-03-31 22:10:53,597 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-03-31 22:10:53,597 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-03-31 22:10:53,598 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-03-31 22:10:53,598 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-03-31 22:10:53,599 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-03-31 22:10:53,599 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-03-31 22:10:53,600 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-03-31 22:10:53,601 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-03-31 22:10:53,602 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-03-31 22:10:53,603 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-03-31 22:10:53,604 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-03-31 22:10:53,604 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-03-31 22:10:53,605 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-03-31 22:10:53,607 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2023-03-31 22:10:53,607 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2023-03-31 22:10:53,607 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-03-31 22:10:53,608 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2023-03-31 22:10:53,608 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2023-03-31 22:10:53,609 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-03-31 22:10:53,609 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-03-31 22:10:53,610 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-03-31 22:10:53,610 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-03-31 22:10:53,610 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-03-31 22:10:53,611 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-03-31 22:10:53,611 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2023-03-31 22:10:53,612 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2023-03-31 22:10:53,612 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2023-03-31 22:10:53,612 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2023-03-31 22:10:53,613 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2023-03-31 22:10:53,613 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-03-31 22:10:53,614 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 22:10:53,628 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-03-31 22:10:53,629 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-03-31 22:10:53,629 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-03-31 22:10:53,629 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-03-31 22:10:53,629 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-03-31 22:10:53,630 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-03-31 22:10:53,630 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-03-31 22:10:53,630 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-03-31 22:10:53,630 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-03-31 22:10:53,630 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-03-31 22:10:53,630 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-03-31 22:10:53,630 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-03-31 22:10:53,630 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-03-31 22:10:53,630 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-03-31 22:10:53,631 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-03-31 22:10:53,631 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-03-31 22:10:53,631 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-03-31 22:10:53,631 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-03-31 22:10:53,631 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-03-31 22:10:53,631 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-03-31 22:10:53,632 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-03-31 22:10:53,632 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-03-31 22:10:53,632 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-03-31 22:10:53,632 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-03-31 22:10:53,632 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-03-31 22:10:53,632 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-03-31 22:10:53,632 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-03-31 22:10:53,632 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-03-31 22:10:53,632 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-03-31 22:10:53,633 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-03-31 22:10:53,633 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-03-31 22:10:53,633 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-03-31 22:10:53,633 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 22:10:53,633 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-03-31 22:10:53,633 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-03-31 22:10:53,633 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-03-31 22:10:53,633 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-03-31 22:10:53,634 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-03-31 22:10:53,634 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-03-31 22:10:53,634 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-03-31 22:10:53,634 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-03-31 22:10:53,634 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain
[2023-03-31 22:10:53,810 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-03-31 22:10:53,823 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-03-31 22:10:53,825 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-03-31 22:10:53,825 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-03-31 22:10:53,826 INFO  L275        PluginConnector]: CDTParser initialized
[2023-03-31 22:10:53,826 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label08.c
[2023-03-31 22:10:54,756 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-03-31 22:10:55,093 INFO  L351              CDTParser]: Found 1 translation units.
[2023-03-31 22:10:55,093 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label08.c
[2023-03-31 22:10:55,107 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e33a743bc/c44e2ce7e20548808e3ef263b5be6020/FLAG52036f74d
[2023-03-31 22:10:55,121 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e33a743bc/c44e2ce7e20548808e3ef263b5be6020
[2023-03-31 22:10:55,122 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-03-31 22:10:55,124 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-03-31 22:10:55,128 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-03-31 22:10:55,128 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-03-31 22:10:55,130 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-03-31 22:10:55,131 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:10:55" (1/1) ...
[2023-03-31 22:10:55,131 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dd1dfb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:55, skipping insertion in model container
[2023-03-31 22:10:55,132 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:10:55" (1/1) ...
[2023-03-31 22:10:55,137 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-03-31 22:10:55,186 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-03-31 22:10:55,365 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/Problem15_label08.c[6299,6312]
[2023-03-31 22:10:55,658 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 22:10:55,666 INFO  L203         MainTranslator]: Completed pre-run
[2023-03-31 22:10:55,694 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/Problem15_label08.c[6299,6312]
[2023-03-31 22:10:55,841 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 22:10:55,851 INFO  L208         MainTranslator]: Completed translation
[2023-03-31 22:10:55,852 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:55 WrapperNode
[2023-03-31 22:10:55,852 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-03-31 22:10:55,853 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-03-31 22:10:55,853 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-03-31 22:10:55,853 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-03-31 22:10:55,860 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:55" (1/1) ...
[2023-03-31 22:10:55,861 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:55" (1/1) ...
[2023-03-31 22:10:55,880 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:55" (1/1) ...
[2023-03-31 22:10:55,880 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:55" (1/1) ...
[2023-03-31 22:10:55,918 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:55" (1/1) ...
[2023-03-31 22:10:55,926 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:55" (1/1) ...
[2023-03-31 22:10:55,958 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:55" (1/1) ...
[2023-03-31 22:10:55,965 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:55" (1/1) ...
[2023-03-31 22:10:55,979 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-03-31 22:10:55,980 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-03-31 22:10:55,980 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-03-31 22:10:55,981 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-03-31 22:10:55,982 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:55" (1/1) ...
[2023-03-31 22:10:55,988 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 22:10:55,994 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 22:10:56,042 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 22:10:56,056 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 22:10:56,085 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-03-31 22:10:56,086 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-03-31 22:10:56,086 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-03-31 22:10:56,089 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-03-31 22:10:56,089 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-03-31 22:10:56,089 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-03-31 22:10:56,089 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-03-31 22:10:56,089 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-03-31 22:10:56,089 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-03-31 22:10:56,089 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-03-31 22:10:56,089 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-03-31 22:10:56,089 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-03-31 22:10:56,089 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-03-31 22:10:56,089 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-03-31 22:10:56,089 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-03-31 22:10:56,090 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-03-31 22:10:56,090 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-03-31 22:10:56,090 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-03-31 22:10:56,090 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-03-31 22:10:56,090 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-03-31 22:10:56,090 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-03-31 22:10:56,144 INFO  L236             CfgBuilder]: Building ICFG
[2023-03-31 22:10:56,145 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-03-31 22:10:57,995 INFO  L277             CfgBuilder]: Performing block encoding
[2023-03-31 22:10:58,544 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-03-31 22:10:58,561 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-03-31 22:10:58,563 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:10:58 BoogieIcfgContainer
[2023-03-31 22:10:58,563 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-03-31 22:10:58,565 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-03-31 22:10:58,565 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-03-31 22:10:58,567 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-03-31 22:10:58,567 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:10:55" (1/3) ...
[2023-03-31 22:10:58,568 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41edb11f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:10:58, skipping insertion in model container
[2023-03-31 22:10:58,568 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:55" (2/3) ...
[2023-03-31 22:10:58,568 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41edb11f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:10:58, skipping insertion in model container
[2023-03-31 22:10:58,568 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:10:58" (3/3) ...
[2023-03-31 22:10:58,569 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem15_label08.c
[2023-03-31 22:10:58,583 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-03-31 22:10:58,583 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-03-31 22:10:58,628 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-03-31 22:10:58,634 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;@3e573181, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-03-31 22:10:58,635 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-03-31 22:10:58,654 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-03-31 22:10:58,659 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-03-31 22:10:58,659 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:10:58,660 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:10:58,660 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:10:58,664 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:10:58,664 INFO  L85        PathProgramCache]: Analyzing trace with hash 271524102, now seen corresponding path program 1 times
[2023-03-31 22:10:58,687 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:10:58,687 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790039492]
[2023-03-31 22:10:58,687 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:10:58,688 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:10:58,832 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:10:59,028 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 22:10:59,028 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:10:59,029 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790039492]
[2023-03-31 22:10:59,029 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790039492] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:10:59,029 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:10:59,029 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-03-31 22:10:59,031 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21649566]
[2023-03-31 22:10:59,031 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:10:59,034 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-03-31 22:10:59,034 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:10:59,054 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-03-31 22:10:59,055 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-03-31 22:10:59,058 INFO  L87              Difference]: Start difference. First operand  has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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)
[2023-03-31 22:11:00,328 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:11:00,328 INFO  L93              Difference]: Finished difference Result 718 states and 1389 transitions.
[2023-03-31 22:11:00,329 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-03-31 22:11:00,330 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
[2023-03-31 22:11:00,330 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:11:00,344 INFO  L225             Difference]: With dead ends: 718
[2023-03-31 22:11:00,344 INFO  L226             Difference]: Without dead ends: 471
[2023-03-31 22:11:00,353 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 22:11:00,358 INFO  L413           NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2023-03-31 22:11:00,358 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2023-03-31 22:11:00,373 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 471 states.
[2023-03-31 22:11:00,404 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469.
[2023-03-31 22:11:00,408 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 469 states, 459 states have (on average 1.5969498910675382) internal successors, (733), 459 states have internal predecessors, (733), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6)
[2023-03-31 22:11:00,410 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions.
[2023-03-31 22:11:00,411 INFO  L78                 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11
[2023-03-31 22:11:00,411 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:11:00,411 INFO  L495      AbstractCegarLoop]: Abstraction has 469 states and 744 transitions.
[2023-03-31 22:11:00,411 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)
[2023-03-31 22:11:00,411 INFO  L276                IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions.
[2023-03-31 22:11:00,412 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2023-03-31 22:11:00,412 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:11:00,412 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:11:00,413 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-03-31 22:11:00,413 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:11:00,413 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:11:00,413 INFO  L85        PathProgramCache]: Analyzing trace with hash 72390680, now seen corresponding path program 1 times
[2023-03-31 22:11:00,413 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:11:00,414 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385525371]
[2023-03-31 22:11:00,414 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:11:00,414 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:11:00,432 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:11:00,485 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 22:11:00,485 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:11:00,485 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385525371]
[2023-03-31 22:11:00,486 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385525371] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:11:00,486 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:11:00,486 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-03-31 22:11:00,486 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127439911]
[2023-03-31 22:11:00,486 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:11:00,498 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-03-31 22:11:00,498 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:11:00,498 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-03-31 22:11:00,498 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-03-31 22:11:00,499 INFO  L87              Difference]: Start difference. First operand 469 states and 744 transitions. Second operand  has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-03-31 22:11:01,598 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:11:01,598 INFO  L93              Difference]: Finished difference Result 1395 states and 2229 transitions.
[2023-03-31 22:11:01,599 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-03-31 22:11:01,599 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21
[2023-03-31 22:11:01,599 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:11:01,603 INFO  L225             Difference]: With dead ends: 1395
[2023-03-31 22:11:01,603 INFO  L226             Difference]: Without dead ends: 931
[2023-03-31 22:11:01,604 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 22:11:01,605 INFO  L413           NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2023-03-31 22:11:01,605 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2023-03-31 22:11:01,606 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 931 states.
[2023-03-31 22:11:01,628 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929.
[2023-03-31 22:11:01,629 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 929 states, 913 states have (on average 1.3723986856516976) internal successors, (1253), 913 states have internal predecessors, (1253), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15)
[2023-03-31 22:11:01,632 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1276 transitions.
[2023-03-31 22:11:01,632 INFO  L78                 Accepts]: Start accepts. Automaton has 929 states and 1276 transitions. Word has length 21
[2023-03-31 22:11:01,632 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:11:01,632 INFO  L495      AbstractCegarLoop]: Abstraction has 929 states and 1276 transitions.
[2023-03-31 22:11:01,632 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-03-31 22:11:01,632 INFO  L276                IsEmpty]: Start isEmpty. Operand 929 states and 1276 transitions.
[2023-03-31 22:11:01,634 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2023-03-31 22:11:01,634 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:11:01,634 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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]
[2023-03-31 22:11:01,634 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-03-31 22:11:01,634 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:11:01,634 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:11:01,634 INFO  L85        PathProgramCache]: Analyzing trace with hash 721125645, now seen corresponding path program 1 times
[2023-03-31 22:11:01,635 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:11:01,635 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732520701]
[2023-03-31 22:11:01,635 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:11:01,635 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:11:01,659 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:11:01,870 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked.
[2023-03-31 22:11:01,871 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:11:01,871 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732520701]
[2023-03-31 22:11:01,871 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732520701] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:11:01,871 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:11:01,871 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-03-31 22:11:01,871 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186496950]
[2023-03-31 22:11:01,871 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:11:01,872 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 22:11:01,872 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:11:01,872 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 22:11:01,872 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-03-31 22:11:01,873 INFO  L87              Difference]: Start difference. First operand 929 states and 1276 transitions. Second operand  has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2023-03-31 22:11:03,674 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:11:03,675 INFO  L93              Difference]: Finished difference Result 2350 states and 3356 transitions.
[2023-03-31 22:11:03,675 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-03-31 22:11:03,675 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67
[2023-03-31 22:11:03,676 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:11:03,680 INFO  L225             Difference]: With dead ends: 2350
[2023-03-31 22:11:03,681 INFO  L226             Difference]: Without dead ends: 1426
[2023-03-31 22:11:03,685 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-03-31 22:11:03,687 INFO  L413           NwaCegarLoop]: 15 mSDtfsCounter, 788 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time
[2023-03-31 22:11:03,688 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 44 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time]
[2023-03-31 22:11:03,690 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1426 states.
[2023-03-31 22:11:03,747 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1403.
[2023-03-31 22:11:03,749 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1403 states, 1374 states have (on average 1.294759825327511) internal successors, (1779), 1379 states have internal predecessors, (1779), 12 states have call successors, (12), 12 states have call predecessors, (12), 16 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33)
[2023-03-31 22:11:03,752 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1824 transitions.
[2023-03-31 22:11:03,752 INFO  L78                 Accepts]: Start accepts. Automaton has 1403 states and 1824 transitions. Word has length 67
[2023-03-31 22:11:03,769 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:11:03,769 INFO  L495      AbstractCegarLoop]: Abstraction has 1403 states and 1824 transitions.
[2023-03-31 22:11:03,769 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2023-03-31 22:11:03,769 INFO  L276                IsEmpty]: Start isEmpty. Operand 1403 states and 1824 transitions.
[2023-03-31 22:11:03,779 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 174
[2023-03-31 22:11:03,779 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:11:03,779 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:11:03,779 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-03-31 22:11:03,780 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:11:03,780 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:11:03,781 INFO  L85        PathProgramCache]: Analyzing trace with hash 1814946773, now seen corresponding path program 1 times
[2023-03-31 22:11:03,781 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:11:03,781 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855170622]
[2023-03-31 22:11:03,781 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:11:03,781 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:11:03,866 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:11:04,098 INFO  L134       CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2023-03-31 22:11:04,098 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:11:04,098 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855170622]
[2023-03-31 22:11:04,098 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855170622] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:11:04,099 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:11:04,099 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-03-31 22:11:04,099 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331167621]
[2023-03-31 22:11:04,099 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:11:04,100 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-03-31 22:11:04,100 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:11:04,101 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-03-31 22:11:04,101 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-03-31 22:11:04,101 INFO  L87              Difference]: Start difference. First operand 1403 states and 1824 transitions. Second operand  has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)
[2023-03-31 22:11:05,407 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:11:05,408 INFO  L93              Difference]: Finished difference Result 3496 states and 4706 transitions.
[2023-03-31 22:11:05,409 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-03-31 22:11:05,409 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 173
[2023-03-31 22:11:05,409 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:11:05,415 INFO  L225             Difference]: With dead ends: 3496
[2023-03-31 22:11:05,415 INFO  L226             Difference]: Without dead ends: 2098
[2023-03-31 22:11:05,418 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 22:11:05,424 INFO  L413           NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time
[2023-03-31 22:11:05,425 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time]
[2023-03-31 22:11:05,427 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2098 states.
[2023-03-31 22:11:05,454 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1868.
[2023-03-31 22:11:05,456 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1868 states, 1831 states have (on average 1.251228836701256) internal successors, (2291), 1840 states have internal predecessors, (2291), 14 states have call successors, (14), 14 states have call predecessors, (14), 22 states have return successors, (57), 13 states have call predecessors, (57), 13 states have call successors, (57)
[2023-03-31 22:11:05,460 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2362 transitions.
[2023-03-31 22:11:05,461 INFO  L78                 Accepts]: Start accepts. Automaton has 1868 states and 2362 transitions. Word has length 173
[2023-03-31 22:11:05,463 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:11:05,463 INFO  L495      AbstractCegarLoop]: Abstraction has 1868 states and 2362 transitions.
[2023-03-31 22:11:05,463 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)
[2023-03-31 22:11:05,463 INFO  L276                IsEmpty]: Start isEmpty. Operand 1868 states and 2362 transitions.
[2023-03-31 22:11:05,466 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 178
[2023-03-31 22:11:05,466 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:11:05,466 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:11:05,466 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-03-31 22:11:05,466 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:11:05,466 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:11:05,467 INFO  L85        PathProgramCache]: Analyzing trace with hash 2107952493, now seen corresponding path program 1 times
[2023-03-31 22:11:05,467 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:11:05,467 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537705786]
[2023-03-31 22:11:05,467 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:11:05,467 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:11:05,508 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:11:05,677 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 22:11:05,677 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:11:05,677 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537705786]
[2023-03-31 22:11:05,677 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537705786] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 22:11:05,677 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793710761]
[2023-03-31 22:11:05,677 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:11:05,677 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:11:05,678 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 22:11:05,680 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 22:11:05,728 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 22:11:05,811 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:11:05,813 INFO  L262         TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-03-31 22:11:05,820 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 22:11:05,948 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 22:11:05,949 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-31 22:11:06,049 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 22:11:06,049 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793710761] provided 0 perfect and 2 imperfect interpolant sequences
[2023-03-31 22:11:06,049 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [216335341]
[2023-03-31 22:11:06,065 INFO  L159        IcfgInterpreter]: Started Sifa with 148 locations of interest
[2023-03-31 22:11:06,065 INFO  L166        IcfgInterpreter]: Building call graph
[2023-03-31 22:11:06,068 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-03-31 22:11:06,071 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-03-31 22:11:06,072 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-03-31 22:11:06,214 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs
[2023-03-31 22:11:06,511 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 45
[2023-03-31 22:11:06,781 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 5669 conjuctions. This might take some time...
[2023-03-31 22:11:06,855 INFO  L192   XnfTransformerHelper]: Simplified to disjunction of 86 conjuctions. 
[2023-03-31 22:11:06,928 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 16
[2023-03-31 22:11:07,726 INFO  L197        IcfgInterpreter]: Interpreting procedure calculate_output with input of size 42 for LOIs
[2023-03-31 22:11:07,863 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 45
[2023-03-31 22:11:08,131 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 5517 conjuctions. This might take some time...
[2023-03-31 22:11:08,270 INFO  L192   XnfTransformerHelper]: Simplified to disjunction of 86 conjuctions. 
[2023-03-31 22:11:17,439 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 16
[2023-03-31 22:11:24,017 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 721525 conjuctions. This might take some time...