/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 OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label49.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-02 20:02:39,855 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-02 20:02:39,857 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-02 20:02:39,892 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-02 20:02:39,894 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-02 20:02:39,897 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-02 20:02:39,900 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-02 20:02:39,901 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-02 20:02:39,905 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-02 20:02:39,907 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-02 20:02:39,908 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-02 20:02:39,908 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-02 20:02:39,912 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-04-02 20:02:39,914 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-02 20:02:39,916 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-02 20:02:39,917 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-02 20:02:39,917 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-02 20:02:39,920 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-02 20:02:39,925 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-02 20:02:39,926 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-02 20:02:39,927 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-02 20:02:39,928 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-02 20:02:39,929 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-02 20:02:39,937 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-02 20:02:39,941 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-04-02 20:02:39,942 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-02 20:02:39,943 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-02 20:02:39,943 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
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[2023-04-02 20:02:39,944 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-02 20:02:39,946 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-02 20:02:39,947 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
[2023-04-02 20:02:39,975 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-02 20:02:39,975 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-02 20:02:39,976 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-02 20:02:39,976 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-02 20:02:39,977 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-02 20:02:39,977 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-02 20:02:39,977 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-02 20:02:39,977 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-02 20:02:39,977 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-02 20:02:39,977 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-02 20:02:39,978 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-02 20:02:39,978 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-02 20:02:39,978 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-02 20:02:39,979 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-02 20:02:39,979 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-02 20:02:39,979 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-02 20:02:39,979 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-02 20:02:39,979 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-02 20:02:39,980 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-02 20:02:39,980 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-02 20:02:39,980 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-02 20:02:39,980 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-02 20:02:39,980 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-02 20:02:39,980 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-02 20:02:39,981 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-02 20:02:39,981 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-02 20:02:39,981 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-02 20:02:39,981 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-02 20:02:39,981 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-02 20:02:39,981 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-02 20:02:39,981 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-02 20:02:39,982 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-02 20:02:39,982 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-02 20:02:39,982 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-02 20:02:39,982 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-02 20:02:39,982 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-02 20:02:39,982 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-02 20:02:39,983 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-02 20:02:39,983 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-02 20:02:39,983 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-02 20:02:39,983 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-02 20:02:39,983 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-02 20:02:40,241 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-02 20:02:40,270 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-02 20:02:40,272 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-02 20:02:40,273 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-02 20:02:40,274 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-02 20:02:40,275 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label49.c
[2023-04-02 20:02:41,486 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-02 20:02:41,854 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-02 20:02:41,855 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label49.c
[2023-04-02 20:02:41,877 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6982cd0af/259518c9fc534889aa43635c46a7f880/FLAG6ad73bd1e
[2023-04-02 20:02:41,892 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6982cd0af/259518c9fc534889aa43635c46a7f880
[2023-04-02 20:02:41,895 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-02 20:02:41,897 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-02 20:02:41,900 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-02 20:02:41,900 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-02 20:02:41,905 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-02 20:02:41,906 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:02:41" (1/1) ...
[2023-04-02 20:02:41,907 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ec5e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:41, skipping insertion in model container
[2023-04-02 20:02:41,907 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:02:41" (1/1) ...
[2023-04-02 20:02:41,916 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-02 20:02:41,987 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-02 20:02:42,206 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_label49.c[6430,6443]
[2023-04-02 20:02:42,637 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-02 20:02:42,650 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-02 20:02:42,685 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_label49.c[6430,6443]
[2023-04-02 20:02:42,943 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-02 20:02:42,957 INFO  L208         MainTranslator]: Completed translation
[2023-04-02 20:02:42,958 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:42 WrapperNode
[2023-04-02 20:02:42,958 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-02 20:02:42,959 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-02 20:02:42,959 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-02 20:02:42,959 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-02 20:02:42,969 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:42" (1/1) ...
[2023-04-02 20:02:42,970 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:42" (1/1) ...
[2023-04-02 20:02:43,001 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:42" (1/1) ...
[2023-04-02 20:02:43,001 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:42" (1/1) ...
[2023-04-02 20:02:43,081 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:42" (1/1) ...
[2023-04-02 20:02:43,100 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:42" (1/1) ...
[2023-04-02 20:02:43,124 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:42" (1/1) ...
[2023-04-02 20:02:43,135 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:42" (1/1) ...
[2023-04-02 20:02:43,154 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-02 20:02:43,155 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-02 20:02:43,155 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-02 20:02:43,155 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-02 20:02:43,156 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:42" (1/1) ...
[2023-04-02 20:02:43,165 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-02 20:02:43,175 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-02 20:02:43,187 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)
[2023-04-02 20:02:43,210 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
[2023-04-02 20:02:43,228 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-02 20:02:43,229 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-02 20:02:43,229 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-02 20:02:43,230 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-02 20:02:43,230 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-02 20:02:43,230 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-02 20:02:43,230 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-02 20:02:43,231 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-02 20:02:43,231 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-02 20:02:43,231 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-02 20:02:43,231 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-02 20:02:43,231 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-02 20:02:43,231 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-02 20:02:43,231 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-02 20:02:43,231 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-02 20:02:43,231 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-02 20:02:43,231 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-02 20:02:43,231 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-02 20:02:43,232 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-02 20:02:43,232 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-02 20:02:43,232 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-02 20:02:43,315 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-02 20:02:43,317 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-02 20:02:45,998 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-02 20:02:46,657 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-02 20:02:46,658 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-02 20:02:46,663 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:02:46 BoogieIcfgContainer
[2023-04-02 20:02:46,663 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-02 20:02:46,666 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-02 20:02:46,666 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-02 20:02:46,669 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-02 20:02:46,669 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 08:02:41" (1/3) ...
[2023-04-02 20:02:46,669 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f309192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:02:46, skipping insertion in model container
[2023-04-02 20:02:46,670 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:02:42" (2/3) ...
[2023-04-02 20:02:46,670 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f309192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:02:46, skipping insertion in model container
[2023-04-02 20:02:46,670 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:02:46" (3/3) ...
[2023-04-02 20:02:46,671 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem15_label49.c
[2023-04-02 20:02:46,688 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-02 20:02:46,688 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-02 20:02:46,745 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-02 20:02:46,752 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;@60e775b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-02 20:02:46,752 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-02 20:02:46,757 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)
[2023-04-02 20:02:46,763 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-02 20:02:46,763 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 20:02:46,764 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-02 20:02:46,764 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 20:02:46,770 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 20:02:46,770 INFO  L85        PathProgramCache]: Analyzing trace with hash 271524358, now seen corresponding path program 1 times
[2023-04-02 20:02:46,779 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 20:02:46,779 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829843055]
[2023-04-02 20:02:46,779 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:02:46,780 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 20:02:46,907 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:02:47,121 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 20:02:47,122 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 20:02:47,122 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829843055]
[2023-04-02 20:02:47,123 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829843055] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-02 20:02:47,123 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-02 20:02:47,123 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-02 20:02:47,124 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708331382]
[2023-04-02 20:02:47,125 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-02 20:02:47,128 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-02 20:02:47,128 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 20:02:47,151 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-02 20:02:47,152 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-02 20:02:47,155 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)
[2023-04-02 20:02:48,896 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 20:02:48,896 INFO  L93              Difference]: Finished difference Result 718 states and 1389 transitions.
[2023-04-02 20:02:48,897 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-02 20:02:48,898 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
[2023-04-02 20:02:48,899 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 20:02:48,910 INFO  L225             Difference]: With dead ends: 718
[2023-04-02 20:02:48,910 INFO  L226             Difference]: Without dead ends: 471
[2023-04-02 20:02:48,916 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
[2023-04-02 20:02:48,919 INFO  L413           NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time
[2023-04-02 20:02:48,920 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time]
[2023-04-02 20:02:48,937 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 471 states.
[2023-04-02 20:02:48,982 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469.
[2023-04-02 20:02:48,985 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)
[2023-04-02 20:02:48,987 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions.
[2023-04-02 20:02:48,988 INFO  L78                 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11
[2023-04-02 20:02:48,989 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 20:02:48,989 INFO  L495      AbstractCegarLoop]: Abstraction has 469 states and 744 transitions.
[2023-04-02 20:02:48,989 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)
[2023-04-02 20:02:48,989 INFO  L276                IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions.
[2023-04-02 20:02:48,990 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2023-04-02 20:02:48,991 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 20:02:48,991 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-02 20:02:48,991 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-02 20:02:48,991 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 20:02:48,992 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 20:02:48,992 INFO  L85        PathProgramCache]: Analyzing trace with hash -1392963249, now seen corresponding path program 1 times
[2023-04-02 20:02:48,992 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 20:02:48,992 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032537392]
[2023-04-02 20:02:48,992 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:02:48,993 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 20:02:49,016 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:02:49,161 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 20:02:49,161 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 20:02:49,161 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032537392]
[2023-04-02 20:02:49,162 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032537392] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-02 20:02:49,162 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-02 20:02:49,162 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-02 20:02:49,162 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114639622]
[2023-04-02 20:02:49,162 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-02 20:02:49,163 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-02 20:02:49,163 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 20:02:49,164 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-02 20:02:49,164 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-02 20:02:49,164 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)
[2023-04-02 20:02:50,419 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 20:02:50,420 INFO  L93              Difference]: Finished difference Result 1395 states and 2229 transitions.
[2023-04-02 20:02:50,422 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-02 20:02:50,422 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
[2023-04-02 20:02:50,423 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 20:02:50,428 INFO  L225             Difference]: With dead ends: 1395
[2023-04-02 20:02:50,428 INFO  L226             Difference]: Without dead ends: 931
[2023-04-02 20:02:50,429 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
[2023-04-02 20:02:50,430 INFO  L413           NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time
[2023-04-02 20:02:50,431 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2023-04-02 20:02:50,433 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 931 states.
[2023-04-02 20:02:50,472 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929.
[2023-04-02 20:02:50,475 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)
[2023-04-02 20:02:50,479 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1276 transitions.
[2023-04-02 20:02:50,479 INFO  L78                 Accepts]: Start accepts. Automaton has 929 states and 1276 transitions. Word has length 21
[2023-04-02 20:02:50,479 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 20:02:50,479 INFO  L495      AbstractCegarLoop]: Abstraction has 929 states and 1276 transitions.
[2023-04-02 20:02:50,480 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)
[2023-04-02 20:02:50,480 INFO  L276                IsEmpty]: Start isEmpty. Operand 929 states and 1276 transitions.
[2023-04-02 20:02:50,481 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2023-04-02 20:02:50,482 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 20:02:50,482 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]
[2023-04-02 20:02:50,482 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-02 20:02:50,482 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 20:02:50,483 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 20:02:50,483 INFO  L85        PathProgramCache]: Analyzing trace with hash -1805315717, now seen corresponding path program 1 times
[2023-04-02 20:02:50,483 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 20:02:50,483 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80084662]
[2023-04-02 20:02:50,483 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:02:50,483 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 20:02:50,514 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:02:50,854 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked.
[2023-04-02 20:02:50,854 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 20:02:50,854 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80084662]
[2023-04-02 20:02:50,855 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80084662] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-02 20:02:50,856 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-02 20:02:50,856 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-02 20:02:50,856 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879190558]
[2023-04-02 20:02:50,856 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-02 20:02:50,857 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-02 20:02:50,857 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 20:02:50,857 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-02 20:02:50,857 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-04-02 20:02:50,858 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)
[2023-04-02 20:02:53,520 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 20:02:53,521 INFO  L93              Difference]: Finished difference Result 2350 states and 3356 transitions.
[2023-04-02 20:02:53,521 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-04-02 20:02:53,522 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
[2023-04-02 20:02:53,522 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 20:02:53,530 INFO  L225             Difference]: With dead ends: 2350
[2023-04-02 20:02:53,531 INFO  L226             Difference]: Without dead ends: 1426
[2023-04-02 20:02:53,537 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
[2023-04-02 20:02:53,540 INFO  L413           NwaCegarLoop]: 15 mSDtfsCounter, 788 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.6s IncrementalHoareTripleChecker+Time
[2023-04-02 20:02:53,542 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 44 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time]
[2023-04-02 20:02:53,545 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1426 states.
[2023-04-02 20:02:53,592 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1403.
[2023-04-02 20:02:53,595 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)
[2023-04-02 20:02:53,599 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1824 transitions.
[2023-04-02 20:02:53,599 INFO  L78                 Accepts]: Start accepts. Automaton has 1403 states and 1824 transitions. Word has length 67
[2023-04-02 20:02:53,600 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 20:02:53,600 INFO  L495      AbstractCegarLoop]: Abstraction has 1403 states and 1824 transitions.
[2023-04-02 20:02:53,600 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)
[2023-04-02 20:02:53,600 INFO  L276                IsEmpty]: Start isEmpty. Operand 1403 states and 1824 transitions.
[2023-04-02 20:02:53,613 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 174
[2023-04-02 20:02:53,613 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 20:02:53,614 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]
[2023-04-02 20:02:53,614 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-02 20:02:53,614 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 20:02:53,617 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 20:02:53,617 INFO  L85        PathProgramCache]: Analyzing trace with hash -1926527115, now seen corresponding path program 1 times
[2023-04-02 20:02:53,617 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 20:02:53,617 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44643901]
[2023-04-02 20:02:53,617 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:02:53,617 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 20:02:53,694 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:02:53,985 INFO  L134       CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2023-04-02 20:02:53,986 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 20:02:53,986 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44643901]
[2023-04-02 20:02:53,986 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44643901] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-02 20:02:53,987 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-02 20:02:53,987 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-02 20:02:53,987 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836708278]
[2023-04-02 20:02:53,987 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-02 20:02:53,989 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-02 20:02:53,989 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 20:02:53,989 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-02 20:02:53,989 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-02 20:02:53,990 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)
[2023-04-02 20:02:55,436 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 20:02:55,436 INFO  L93              Difference]: Finished difference Result 3496 states and 4706 transitions.
[2023-04-02 20:02:55,436 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-02 20:02:55,437 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
[2023-04-02 20:02:55,437 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 20:02:55,447 INFO  L225             Difference]: With dead ends: 3496
[2023-04-02 20:02:55,447 INFO  L226             Difference]: Without dead ends: 2098
[2023-04-02 20:02:55,451 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
[2023-04-02 20:02:55,452 INFO  L413           NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time
[2023-04-02 20:02:55,452 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time]
[2023-04-02 20:02:55,455 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2098 states.
[2023-04-02 20:02:55,491 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1868.
[2023-04-02 20:02:55,494 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)
[2023-04-02 20:02:55,499 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2362 transitions.
[2023-04-02 20:02:55,499 INFO  L78                 Accepts]: Start accepts. Automaton has 1868 states and 2362 transitions. Word has length 173
[2023-04-02 20:02:55,500 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 20:02:55,500 INFO  L495      AbstractCegarLoop]: Abstraction has 1868 states and 2362 transitions.
[2023-04-02 20:02:55,500 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)
[2023-04-02 20:02:55,501 INFO  L276                IsEmpty]: Start isEmpty. Operand 1868 states and 2362 transitions.
[2023-04-02 20:02:55,502 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 178
[2023-04-02 20:02:55,502 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 20:02:55,503 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]
[2023-04-02 20:02:55,503 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-02 20:02:55,503 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 20:02:55,503 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 20:02:55,503 INFO  L85        PathProgramCache]: Analyzing trace with hash -875552499, now seen corresponding path program 1 times
[2023-04-02 20:02:55,504 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 20:02:55,504 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071175854]
[2023-04-02 20:02:55,504 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:02:55,504 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 20:02:55,553 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:02:55,779 INFO  L134       CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 20:02:55,779 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 20:02:55,779 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071175854]
[2023-04-02 20:02:55,779 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071175854] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-02 20:02:55,780 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789162336]
[2023-04-02 20:02:55,780 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:02:55,781 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-02 20:02:55,781 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-02 20:02:55,793 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)
[2023-04-02 20:02:55,816 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-02 20:02:55,987 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:02:56,010 INFO  L262         TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-02 20:02:56,017 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-02 20:02:56,163 INFO  L134       CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 20:02:56,163 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-02 20:02:56,305 INFO  L134       CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 20:02:56,306 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789162336] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-02 20:02:56,306 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2094085533]
[2023-04-02 20:02:56,327 INFO  L159        IcfgInterpreter]: Started Sifa with 148 locations of interest
[2023-04-02 20:02:56,327 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-02 20:02:56,331 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-02 20:02:56,335 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-02 20:02:56,335 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-02 20:02:56,488 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs
[2023-04-02 20:02:56,877 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 46
[2023-04-02 20:03:02,237 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 46917 conjuctions. This might take some time...
[2023-04-02 20:03:05,301 INFO  L192   XnfTransformerHelper]: Simplified to disjunction of 1065 conjuctions. 
[2023-04-02 20:03:09,036 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 15
[2023-04-02 20:03:46,101 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 1630331 conjuctions. This might take some time...