/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label13.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 10:03:12,805 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 10:03:12,807 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-01 10:03:12,829 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 10:03:12,830 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 10:03:12,830 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 10:03:12,836 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-04-01 10:03:12,837 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 10:03:12,838 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-01 10:03:12,839 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-01 10:03:12,839 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-04-01 10:03:12,841 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 10:03:12,841 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 10:03:12,842 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 10:03:12,843 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 10:03:12,844 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
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[2023-04-01 10:03:12,847 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
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[2023-04-01 10:03:12,849 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-01 10:03:12,854 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 10:03:12,855 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 10:03:12,856 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2023-04-01 10:03:12,873 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 10:03:12,874 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 10:03:12,874 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 10:03:12,874 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 10:03:12,874 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 10:03:12,874 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 10:03:12,875 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 10:03:12,875 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 10:03:12,875 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 10:03:12,875 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 10:03:12,875 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 10:03:12,875 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 10:03:12,875 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 10:03:12,875 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 10:03:12,875 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 10:03:12,875 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 10:03:12,875 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 10:03:12,875 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 10:03:12,876 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 10:03:12,876 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 10:03:12,876 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 10:03:12,876 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 10:03:12,876 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 10:03:12,876 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 10:03:12,876 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 10:03:12,876 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 10:03:12,877 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 10:03:12,877 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 10:03:12,877 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 10:03:12,877 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 10:03:12,877 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 10:03:12,877 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 10:03:12,877 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:03:12,877 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 10:03:12,877 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 10:03:12,877 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 10:03:12,877 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 10:03:12,877 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 10:03:12,878 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 10:03:12,878 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 10:03:12,878 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 10:03:12,878 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 10:03:13,036 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 10:03:13,049 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 10:03:13,050 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 10:03:13,051 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 10:03:13,051 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 10:03:13,052 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label13.c
[2023-04-01 10:03:14,101 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 10:03:14,441 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 10:03:14,441 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label13.c
[2023-04-01 10:03:14,465 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e20544633/cabf497ea36943f7906d63898c7bd014/FLAG2ed3f8ef0
[2023-04-01 10:03:14,478 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e20544633/cabf497ea36943f7906d63898c7bd014
[2023-04-01 10:03:14,481 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 10:03:14,482 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 10:03:14,485 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 10:03:14,485 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 10:03:14,487 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 10:03:14,488 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:03:14" (1/1) ...
[2023-04-01 10:03:14,489 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b44a8ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:14, skipping insertion in model container
[2023-04-01 10:03:14,489 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:03:14" (1/1) ...
[2023-04-01 10:03:14,494 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 10:03:14,605 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 10:03:14,744 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/Problem12_label13.c[3765,3778]
[2023-04-01 10:03:15,264 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:03:15,274 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 10:03:15,290 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/Problem12_label13.c[3765,3778]
[2023-04-01 10:03:15,552 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:03:15,568 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 10:03:15,568 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:15 WrapperNode
[2023-04-01 10:03:15,569 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 10:03:15,570 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 10:03:15,570 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 10:03:15,570 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 10:03:15,578 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:15" (1/1) ...
[2023-04-01 10:03:15,578 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:15" (1/1) ...
[2023-04-01 10:03:15,618 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:15" (1/1) ...
[2023-04-01 10:03:15,618 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:15" (1/1) ...
[2023-04-01 10:03:15,708 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:15" (1/1) ...
[2023-04-01 10:03:15,728 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:15" (1/1) ...
[2023-04-01 10:03:15,750 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:15" (1/1) ...
[2023-04-01 10:03:15,760 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:15" (1/1) ...
[2023-04-01 10:03:15,780 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 10:03:15,781 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 10:03:15,781 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 10:03:15,781 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 10:03:15,782 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:15" (1/1) ...
[2023-04-01 10:03:15,787 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:03:15,794 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:03:15,805 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-04-01 10:03:15,815 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-04-01 10:03:15,836 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 10:03:15,836 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 10:03:15,836 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 10:03:15,836 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 10:03:15,836 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 10:03:15,836 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-04-01 10:03:15,836 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2023-04-01 10:03:15,836 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 10:03:15,836 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 10:03:15,836 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 10:03:15,836 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-04-01 10:03:15,837 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2023-04-01 10:03:15,837 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 10:03:15,837 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 10:03:15,837 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 10:03:15,837 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 10:03:15,837 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 10:03:15,837 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 10:03:15,837 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 10:03:15,837 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 10:03:15,837 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 10:03:15,838 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 10:03:15,838 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 10:03:15,838 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 10:03:15,838 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 10:03:15,906 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 10:03:15,907 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 10:03:18,758 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 10:03:19,133 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 10:03:19,134 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 10:03:19,138 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:03:19 BoogieIcfgContainer
[2023-04-01 10:03:19,138 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 10:03:19,140 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 10:03:19,140 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 10:03:19,143 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 10:03:19,143 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:03:14" (1/3) ...
[2023-04-01 10:03:19,143 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607f26df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:03:19, skipping insertion in model container
[2023-04-01 10:03:19,143 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:15" (2/3) ...
[2023-04-01 10:03:19,143 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607f26df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:03:19, skipping insertion in model container
[2023-04-01 10:03:19,143 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:03:19" (3/3) ...
[2023-04-01 10:03:19,144 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem12_label13.c
[2023-04-01 10:03:19,158 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 10:03:19,158 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 10:03:19,214 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 10:03:19,219 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;@3ded93a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 10:03:19,220 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 10:03:19,226 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-04-01 10:03:19,231 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 10:03:19,232 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:03:19,232 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:03:19,233 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:03:19,237 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:03:19,237 INFO  L85        PathProgramCache]: Analyzing trace with hash 636339201, now seen corresponding path program 1 times
[2023-04-01 10:03:19,244 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:03:19,249 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741109732]
[2023-04-01 10:03:19,249 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:03:19,249 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:03:19,368 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:03:19,503 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:03:19,503 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:03:19,503 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741109732]
[2023-04-01 10:03:19,504 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741109732] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:03:19,504 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:03:19,504 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:03:19,505 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075759216]
[2023-04-01 10:03:19,505 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:03:19,508 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:03:19,508 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:03:19,525 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:03:19,526 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:03:19,529 INFO  L87              Difference]: Start difference. First operand  has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 10:03:22,172 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:03:22,173 INFO  L93              Difference]: Finished difference Result 2068 states and 4065 transitions.
[2023-04-01 10:03:22,173 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:03:22,174 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2023-04-01 10:03:22,175 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:03:22,189 INFO  L225             Difference]: With dead ends: 2068
[2023-04-01 10:03:22,189 INFO  L226             Difference]: Without dead ends: 1371
[2023-04-01 10:03:22,195 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:03:22,197 INFO  L413           NwaCegarLoop]: 130 mSDtfsCounter, 789 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time
[2023-04-01 10:03:22,198 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 155 Invalid, 2876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time]
[2023-04-01 10:03:22,210 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1371 states.
[2023-04-01 10:03:22,252 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1357.
[2023-04-01 10:03:22,255 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1357 states, 1339 states have (on average 1.9066467513069454) internal successors, (2553), 1339 states have internal predecessors, (2553), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14)
[2023-04-01 10:03:22,260 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2576 transitions.
[2023-04-01 10:03:22,261 INFO  L78                 Accepts]: Start accepts. Automaton has 1357 states and 2576 transitions. Word has length 11
[2023-04-01 10:03:22,261 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:03:22,261 INFO  L495      AbstractCegarLoop]: Abstraction has 1357 states and 2576 transitions.
[2023-04-01 10:03:22,262 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 10:03:22,262 INFO  L276                IsEmpty]: Start isEmpty. Operand 1357 states and 2576 transitions.
[2023-04-01 10:03:22,263 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2023-04-01 10:03:22,263 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:03:22,263 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:03:22,263 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 10:03:22,263 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:03:22,264 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:03:22,264 INFO  L85        PathProgramCache]: Analyzing trace with hash -44851196, now seen corresponding path program 1 times
[2023-04-01 10:03:22,264 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:03:22,264 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258088732]
[2023-04-01 10:03:22,264 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:03:22,264 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:03:22,283 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:03:22,442 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:03:22,442 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:03:22,443 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258088732]
[2023-04-01 10:03:22,443 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258088732] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:03:22,443 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:03:22,443 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:03:22,443 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779585410]
[2023-04-01 10:03:22,443 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:03:22,444 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:03:22,444 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:03:22,445 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:03:22,445 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:03:22,445 INFO  L87              Difference]: Start difference. First operand 1357 states and 2576 transitions. Second operand  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:03:25,661 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:03:25,661 INFO  L93              Difference]: Finished difference Result 4113 states and 7854 transitions.
[2023-04-01 10:03:25,661 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:03:25,662 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25
[2023-04-01 10:03:25,662 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:03:25,673 INFO  L225             Difference]: With dead ends: 4113
[2023-04-01 10:03:25,673 INFO  L226             Difference]: Without dead ends: 2761
[2023-04-01 10:03:25,675 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2023-04-01 10:03:25,676 INFO  L413           NwaCegarLoop]: 42 mSDtfsCounter, 2449 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4106 mSolverCounterSat, 889 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2449 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 4995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 889 IncrementalHoareTripleChecker+Valid, 4106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time
[2023-04-01 10:03:25,677 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2449 Valid, 108 Invalid, 4995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [889 Valid, 4106 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time]
[2023-04-01 10:03:25,679 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2761 states.
[2023-04-01 10:03:25,721 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2723.
[2023-04-01 10:03:25,724 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2723 states, 2681 states have (on average 1.7582991421111525) internal successors, (4714), 2685 states have internal predecessors, (4714), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74)
[2023-04-01 10:03:25,731 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2723 states to 2723 states and 4803 transitions.
[2023-04-01 10:03:25,732 INFO  L78                 Accepts]: Start accepts. Automaton has 2723 states and 4803 transitions. Word has length 25
[2023-04-01 10:03:25,732 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:03:25,732 INFO  L495      AbstractCegarLoop]: Abstraction has 2723 states and 4803 transitions.
[2023-04-01 10:03:25,732 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:03:25,732 INFO  L276                IsEmpty]: Start isEmpty. Operand 2723 states and 4803 transitions.
[2023-04-01 10:03:25,733 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2023-04-01 10:03:25,733 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:03:25,733 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:03:25,733 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 10:03:25,733 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:03:25,733 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:03:25,734 INFO  L85        PathProgramCache]: Analyzing trace with hash 1628814240, now seen corresponding path program 1 times
[2023-04-01 10:03:25,734 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:03:25,734 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197549960]
[2023-04-01 10:03:25,734 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:03:25,734 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:03:25,752 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:03:25,825 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:03:25,826 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:03:25,826 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197549960]
[2023-04-01 10:03:25,826 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197549960] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:03:25,827 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:03:25,827 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:03:25,827 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595416938]
[2023-04-01 10:03:25,827 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:03:25,828 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:03:25,828 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:03:25,829 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:03:25,829 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:03:25,829 INFO  L87              Difference]: Start difference. First operand 2723 states and 4803 transitions. Second operand  has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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)
[2023-04-01 10:03:28,288 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:03:28,288 INFO  L93              Difference]: Finished difference Result 8149 states and 14600 transitions.
[2023-04-01 10:03:28,293 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:03:28,293 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 27
[2023-04-01 10:03:28,293 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:03:28,311 INFO  L225             Difference]: With dead ends: 8149
[2023-04-01 10:03:28,312 INFO  L226             Difference]: Without dead ends: 5431
[2023-04-01 10:03:28,317 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
[2023-04-01 10:03:28,318 INFO  L413           NwaCegarLoop]: 1167 mSDtfsCounter, 686 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 2877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time
[2023-04-01 10:03:28,318 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1195 Invalid, 2877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time]
[2023-04-01 10:03:28,322 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5431 states.
[2023-04-01 10:03:28,389 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 5428.
[2023-04-01 10:03:28,396 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5428 states, 5352 states have (on average 1.6429372197309418) internal successors, (8793), 5360 states have internal predecessors, (8793), 27 states have call successors, (27), 27 states have call predecessors, (27), 48 states have return successors, (281), 40 states have call predecessors, (281), 26 states have call successors, (281)
[2023-04-01 10:03:28,408 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 9101 transitions.
[2023-04-01 10:03:28,409 INFO  L78                 Accepts]: Start accepts. Automaton has 5428 states and 9101 transitions. Word has length 27
[2023-04-01 10:03:28,409 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:03:28,409 INFO  L495      AbstractCegarLoop]: Abstraction has 5428 states and 9101 transitions.
[2023-04-01 10:03:28,409 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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)
[2023-04-01 10:03:28,409 INFO  L276                IsEmpty]: Start isEmpty. Operand 5428 states and 9101 transitions.
[2023-04-01 10:03:28,410 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2023-04-01 10:03:28,410 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:03:28,411 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-04-01 10:03:28,411 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 10:03:28,411 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:03:28,411 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:03:28,411 INFO  L85        PathProgramCache]: Analyzing trace with hash 784997804, now seen corresponding path program 1 times
[2023-04-01 10:03:28,411 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:03:28,411 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277472456]
[2023-04-01 10:03:28,411 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:03:28,412 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:03:28,423 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:03:28,563 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:03:28,563 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:03:28,563 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277472456]
[2023-04-01 10:03:28,564 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277472456] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:03:28,564 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:03:28,564 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:03:28,564 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472641622]
[2023-04-01 10:03:28,564 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:03:28,564 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:03:28,564 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:03:28,565 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:03:28,565 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:03:28,565 INFO  L87              Difference]: Start difference. First operand 5428 states and 9101 transitions. Second operand  has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:03:31,704 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:03:31,704 INFO  L93              Difference]: Finished difference Result 16572 states and 28805 transitions.
[2023-04-01 10:03:31,705 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-04-01 10:03:31,705 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37
[2023-04-01 10:03:31,705 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:03:31,742 INFO  L225             Difference]: With dead ends: 16572
[2023-04-01 10:03:31,743 INFO  L226             Difference]: Without dead ends: 11149
[2023-04-01 10:03:31,752 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-04-01 10:03:31,753 INFO  L413           NwaCegarLoop]: 31 mSDtfsCounter, 2784 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 3687 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2784 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 4357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 3687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time
[2023-04-01 10:03:31,753 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2784 Valid, 88 Invalid, 4357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 3687 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time]
[2023-04-01 10:03:31,762 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11149 states.
[2023-04-01 10:03:31,928 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11149 to 8400.
[2023-04-01 10:03:31,941 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8400 states, 8200 states have (on average 1.5396341463414633) internal successors, (12625), 8243 states have internal predecessors, (12625), 41 states have call successors, (41), 41 states have call predecessors, (41), 158 states have return successors, (960), 115 states have call predecessors, (960), 40 states have call successors, (960)
[2023-04-01 10:03:31,957 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8400 states to 8400 states and 13626 transitions.
[2023-04-01 10:03:31,957 INFO  L78                 Accepts]: Start accepts. Automaton has 8400 states and 13626 transitions. Word has length 37
[2023-04-01 10:03:31,958 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:03:31,958 INFO  L495      AbstractCegarLoop]: Abstraction has 8400 states and 13626 transitions.
[2023-04-01 10:03:31,958 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:03:31,958 INFO  L276                IsEmpty]: Start isEmpty. Operand 8400 states and 13626 transitions.
[2023-04-01 10:03:31,964 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2023-04-01 10:03:31,964 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:03:31,965 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:03:31,965 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 10:03:31,965 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:03:31,966 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:03:31,966 INFO  L85        PathProgramCache]: Analyzing trace with hash -1425648285, now seen corresponding path program 1 times
[2023-04-01 10:03:31,966 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:03:31,968 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050669398]
[2023-04-01 10:03:31,968 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:03:31,968 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:03:31,995 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:03:32,072 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:03:32,072 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:03:32,073 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050669398]
[2023-04-01 10:03:32,073 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050669398] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:03:32,073 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047792170]
[2023-04-01 10:03:32,073 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:03:32,073 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:03:32,073 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:03:32,075 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-01 10:03:32,078 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-01 10:03:32,158 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:03:32,160 INFO  L262         TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 10:03:32,164 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:03:32,215 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:03:32,215 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 10:03:32,286 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:03:32,286 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047792170] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 10:03:32,286 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1718630016]
[2023-04-01 10:03:32,322 INFO  L159        IcfgInterpreter]: Started Sifa with 23 locations of interest
[2023-04-01 10:03:32,322 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 10:03:32,328 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 10:03:32,334 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 10:03:32,334 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 10:03:32,809 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 84 for LOIs
[2023-04-01 10:03:33,007 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 22
[2023-04-01 10:03:37,034 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 39
[2023-04-01 10:03:53,507 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 649539 conjuctions. This might take some time...