/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/Problem16_label55.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-02 20:13:13,836 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-02 20:13:13,838 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-02 20:13:13,869 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-02 20:13:13,871 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-02 20:13:13,873 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-02 20:13:13,875 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-02 20:13:13,876 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-02 20:13:13,879 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-02 20:13:13,881 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-02 20:13:13,882 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-02 20:13:13,882 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-04-02 20:13:13,885 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-02 20:13:13,885 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-02 20:13:13,886 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-02 20:13:13,886 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-02 20:13:13,888 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-02 20:13:13,891 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-02 20:13:13,892 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-02 20:13:13,893 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-02 20:13:13,893 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-02 20:13:13,894 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-02 20:13:13,900 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-02 20:13:13,900 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2023-04-02 20:13:13,902 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2023-04-02 20:13:13,904 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
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[2023-04-02 20:13:13,905 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-02 20:13:13,906 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-02 20:13:13,907 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 20:13:13,930 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-02 20:13:13,931 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-02 20:13:13,931 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-02 20:13:13,931 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-02 20:13:13,932 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-02 20:13:13,932 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-02 20:13:13,932 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-02 20:13:13,932 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-02 20:13:13,932 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-02 20:13:13,932 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-02 20:13:13,933 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-02 20:13:13,933 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-02 20:13:13,933 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-02 20:13:13,933 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-02 20:13:13,933 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-02 20:13:13,933 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-02 20:13:13,934 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-02 20:13:13,934 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-02 20:13:13,934 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-02 20:13:13,934 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-02 20:13:13,934 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-02 20:13:13,934 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-02 20:13:13,934 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-02 20:13:13,934 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-02 20:13:13,935 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-02 20:13:13,935 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-02 20:13:13,935 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-02 20:13:13,935 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-02 20:13:13,935 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-02 20:13:13,935 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-02 20:13:13,936 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-02 20:13:13,936 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-02 20:13:13,936 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-02 20:13:13,936 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-02 20:13:13,936 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-02 20:13:13,936 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-02 20:13:13,936 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-02 20:13:13,936 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-02 20:13:13,937 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-02 20:13:13,937 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-02 20:13:13,937 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-02 20:13:13,937 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-02 20:13:14,130 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-02 20:13:14,146 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-02 20:13:14,148 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-02 20:13:14,149 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-02 20:13:14,150 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-02 20:13:14,150 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label55.c
[2023-04-02 20:13:15,177 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-02 20:13:15,448 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-02 20:13:15,448 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label55.c
[2023-04-02 20:13:15,468 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/072f63729/918cc90bf500478ead05bbd7a9590b59/FLAGa13fdf399
[2023-04-02 20:13:15,478 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/072f63729/918cc90bf500478ead05bbd7a9590b59
[2023-04-02 20:13:15,479 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-02 20:13:15,480 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-02 20:13:15,481 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-02 20:13:15,481 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-02 20:13:15,483 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-02 20:13:15,484 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:13:15" (1/1) ...
[2023-04-02 20:13:15,484 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d891b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:13:15, skipping insertion in model container
[2023-04-02 20:13:15,484 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:13:15" (1/1) ...
[2023-04-02 20:13:15,489 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-02 20:13:15,533 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-02 20:13:15,665 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/Problem16_label55.c[5995,6008]
[2023-04-02 20:13:15,937 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-02 20:13:15,951 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-02 20:13:15,975 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/Problem16_label55.c[5995,6008]
[2023-04-02 20:13:16,075 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-02 20:13:16,086 INFO  L208         MainTranslator]: Completed translation
[2023-04-02 20:13:16,086 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:13:16 WrapperNode
[2023-04-02 20:13:16,086 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-02 20:13:16,087 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-02 20:13:16,087 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-02 20:13:16,087 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-02 20:13:16,095 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:13:16" (1/1) ...
[2023-04-02 20:13:16,095 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:13:16" (1/1) ...
[2023-04-02 20:13:16,121 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:13:16" (1/1) ...
[2023-04-02 20:13:16,121 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:13:16" (1/1) ...
[2023-04-02 20:13:16,171 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:13:16" (1/1) ...
[2023-04-02 20:13:16,185 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:13:16" (1/1) ...
[2023-04-02 20:13:16,199 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:13:16" (1/1) ...
[2023-04-02 20:13:16,206 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:13:16" (1/1) ...
[2023-04-02 20:13:16,216 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-02 20:13:16,216 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-02 20:13:16,217 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-02 20:13:16,217 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-02 20:13:16,218 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:13:16" (1/1) ...
[2023-04-02 20:13:16,223 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-02 20:13:16,230 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-02 20:13:16,239 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 20:13:16,263 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 20:13:16,275 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-02 20:13:16,275 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-02 20:13:16,276 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-02 20:13:16,276 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-02 20:13:16,276 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-02 20:13:16,276 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-02 20:13:16,276 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-02 20:13:16,276 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-02 20:13:16,276 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-02 20:13:16,276 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-02 20:13:16,276 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-02 20:13:16,276 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-02 20:13:16,276 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-02 20:13:16,276 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-02 20:13:16,276 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-02 20:13:16,277 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-02 20:13:16,277 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-02 20:13:16,277 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-02 20:13:16,277 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-02 20:13:16,277 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-02 20:13:16,277 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-02 20:13:16,343 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-02 20:13:16,344 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-02 20:13:17,767 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-02 20:13:18,757 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-02 20:13:18,757 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-02 20:13:18,760 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:13:18 BoogieIcfgContainer
[2023-04-02 20:13:18,760 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-02 20:13:18,762 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-02 20:13:18,762 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-02 20:13:18,764 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-02 20:13:18,764 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 08:13:15" (1/3) ...
[2023-04-02 20:13:18,765 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3905f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:13:18, skipping insertion in model container
[2023-04-02 20:13:18,765 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:13:16" (2/3) ...
[2023-04-02 20:13:18,765 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3905f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:13:18, skipping insertion in model container
[2023-04-02 20:13:18,765 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:13:18" (3/3) ...
[2023-04-02 20:13:18,766 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem16_label55.c
[2023-04-02 20:13:18,778 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-02 20:13:18,778 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-02 20:13:18,823 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-02 20:13:18,828 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;@66a61947, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-02 20:13:18,828 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-02 20:13:18,833 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 20:13:18,837 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-02 20:13:18,838 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 20:13:18,838 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-02 20:13:18,839 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 20:13:18,842 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 20:13:18,843 INFO  L85        PathProgramCache]: Analyzing trace with hash -510214006, now seen corresponding path program 1 times
[2023-04-02 20:13:18,849 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 20:13:18,849 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276308614]
[2023-04-02 20:13:18,850 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:13:18,850 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 20:13:18,946 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:13:19,171 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 20:13:19,171 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 20:13:19,171 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276308614]
[2023-04-02 20:13:19,172 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276308614] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-02 20:13:19,172 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-02 20:13:19,172 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-02 20:13:19,173 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664039592]
[2023-04-02 20:13:19,173 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-02 20:13:19,176 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-02 20:13:19,177 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 20:13:19,249 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-02 20:13:19,250 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-02 20:13:19,254 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 20:13:20,162 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 20:13:20,162 INFO  L93              Difference]: Finished difference Result 718 states and 1389 transitions.
[2023-04-02 20:13:20,163 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-02 20:13:20,164 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 20:13:20,164 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 20:13:20,173 INFO  L225             Difference]: With dead ends: 718
[2023-04-02 20:13:20,173 INFO  L226             Difference]: Without dead ends: 471
[2023-04-02 20:13:20,176 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 20:13:20,178 INFO  L413           NwaCegarLoop]: 45 mSDtfsCounter, 235 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-04-02 20:13:20,179 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 60 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-04-02 20:13:20,191 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 471 states.
[2023-04-02 20:13:20,219 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 463.
[2023-04-02 20:13:20,220 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 463 states, 453 states have (on average 1.9094922737306843) internal successors, (865), 453 states have internal predecessors, (865), 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 20:13:20,221 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 876 transitions.
[2023-04-02 20:13:20,222 INFO  L78                 Accepts]: Start accepts. Automaton has 463 states and 876 transitions. Word has length 11
[2023-04-02 20:13:20,223 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 20:13:20,223 INFO  L495      AbstractCegarLoop]: Abstraction has 463 states and 876 transitions.
[2023-04-02 20:13:20,223 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 20:13:20,223 INFO  L276                IsEmpty]: Start isEmpty. Operand 463 states and 876 transitions.
[2023-04-02 20:13:20,224 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2023-04-02 20:13:20,224 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 20:13:20,224 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 20:13:20,224 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-02 20:13:20,224 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 20:13:20,225 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 20:13:20,225 INFO  L85        PathProgramCache]: Analyzing trace with hash 1707153163, now seen corresponding path program 1 times
[2023-04-02 20:13:20,225 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 20:13:20,225 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271742588]
[2023-04-02 20:13:20,225 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:13:20,225 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 20:13:20,241 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:13:20,323 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 20:13:20,323 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 20:13:20,323 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271742588]
[2023-04-02 20:13:20,323 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271742588] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-02 20:13:20,323 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-02 20:13:20,323 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-02 20:13:20,323 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113543962]
[2023-04-02 20:13:20,324 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-02 20:13:20,324 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-02 20:13:20,324 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 20:13:20,325 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-02 20:13:20,325 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-02 20:13:20,325 INFO  L87              Difference]: Start difference. First operand 463 states and 876 transitions. Second operand  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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)
[2023-04-02 20:13:21,584 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 20:13:21,584 INFO  L93              Difference]: Finished difference Result 1395 states and 2674 transitions.
[2023-04-02 20:13:21,585 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-02 20:13:21,585 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21
[2023-04-02 20:13:21,585 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 20:13:21,593 INFO  L225             Difference]: With dead ends: 1395
[2023-04-02 20:13:21,593 INFO  L226             Difference]: Without dead ends: 937
[2023-04-02 20:13:21,594 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
[2023-04-02 20:13:21,595 INFO  L413           NwaCegarLoop]: 17 mSDtfsCounter, 891 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2023-04-02 20:13:21,595 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 43 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2023-04-02 20:13:21,596 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 937 states.
[2023-04-02 20:13:21,624 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 918.
[2023-04-02 20:13:21,626 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 918 states, 900 states have (on average 1.7822222222222222) internal successors, (1604), 904 states have internal predecessors, (1604), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26)
[2023-04-02 20:13:21,635 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1637 transitions.
[2023-04-02 20:13:21,636 INFO  L78                 Accepts]: Start accepts. Automaton has 918 states and 1637 transitions. Word has length 21
[2023-04-02 20:13:21,636 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 20:13:21,636 INFO  L495      AbstractCegarLoop]: Abstraction has 918 states and 1637 transitions.
[2023-04-02 20:13:21,636 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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)
[2023-04-02 20:13:21,636 INFO  L276                IsEmpty]: Start isEmpty. Operand 918 states and 1637 transitions.
[2023-04-02 20:13:21,637 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2023-04-02 20:13:21,637 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 20:13:21,637 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]
[2023-04-02 20:13:21,637 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-02 20:13:21,637 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 20:13:21,637 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 20:13:21,637 INFO  L85        PathProgramCache]: Analyzing trace with hash 750882542, now seen corresponding path program 1 times
[2023-04-02 20:13:21,638 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 20:13:21,638 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862334062]
[2023-04-02 20:13:21,638 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:13:21,638 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 20:13:21,648 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:13:21,710 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 20:13:21,710 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 20:13:21,710 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862334062]
[2023-04-02 20:13:21,710 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862334062] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-02 20:13:21,711 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-02 20:13:21,711 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-02 20:13:21,711 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926796768]
[2023-04-02 20:13:21,711 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-02 20:13:21,711 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-02 20:13:21,711 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 20:13:21,712 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-02 20:13:21,712 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-02 20:13:21,712 INFO  L87              Difference]: Start difference. First operand 918 states and 1637 transitions. Second operand  has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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)
[2023-04-02 20:13:22,810 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 20:13:22,810 INFO  L93              Difference]: Finished difference Result 2537 states and 4578 transitions.
[2023-04-02 20:13:22,811 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-02 20:13:22,811 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 24
[2023-04-02 20:13:22,811 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 20:13:22,818 INFO  L225             Difference]: With dead ends: 2537
[2023-04-02 20:13:22,818 INFO  L226             Difference]: Without dead ends: 1624
[2023-04-02 20:13:22,823 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
[2023-04-02 20:13:22,825 INFO  L413           NwaCegarLoop]: 16 mSDtfsCounter, 992 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2023-04-02 20:13:22,826 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2023-04-02 20:13:22,828 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1624 states.
[2023-04-02 20:13:22,862 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1550.
[2023-04-02 20:13:22,863 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1550 states, 1519 states have (on average 1.5023041474654377) internal successors, (2282), 1528 states have internal predecessors, (2282), 11 states have call successors, (11), 11 states have call predecessors, (11), 19 states have return successors, (67), 10 states have call predecessors, (67), 10 states have call successors, (67)
[2023-04-02 20:13:22,868 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2360 transitions.
[2023-04-02 20:13:22,868 INFO  L78                 Accepts]: Start accepts. Automaton has 1550 states and 2360 transitions. Word has length 24
[2023-04-02 20:13:22,868 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 20:13:22,869 INFO  L495      AbstractCegarLoop]: Abstraction has 1550 states and 2360 transitions.
[2023-04-02 20:13:22,869 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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)
[2023-04-02 20:13:22,869 INFO  L276                IsEmpty]: Start isEmpty. Operand 1550 states and 2360 transitions.
[2023-04-02 20:13:22,869 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2023-04-02 20:13:22,870 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 20:13:22,870 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]
[2023-04-02 20:13:22,870 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-02 20:13:22,870 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 20:13:22,871 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 20:13:22,871 INFO  L85        PathProgramCache]: Analyzing trace with hash 810652966, now seen corresponding path program 1 times
[2023-04-02 20:13:22,871 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 20:13:22,871 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262663038]
[2023-04-02 20:13:22,871 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:13:22,871 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 20:13:22,887 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:13:23,036 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 20:13:23,036 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 20:13:23,036 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262663038]
[2023-04-02 20:13:23,036 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262663038] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-02 20:13:23,037 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-02 20:13:23,037 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-02 20:13:23,037 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485296519]
[2023-04-02 20:13:23,037 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-02 20:13:23,038 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-02 20:13:23,038 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 20:13:23,039 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-02 20:13:23,039 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-02 20:13:23,039 INFO  L87              Difference]: Start difference. First operand 1550 states and 2360 transitions. Second operand  has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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)
[2023-04-02 20:13:24,393 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 20:13:24,394 INFO  L93              Difference]: Finished difference Result 4442 states and 6841 transitions.
[2023-04-02 20:13:24,398 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-04-02 20:13:24,398 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 28
[2023-04-02 20:13:24,398 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 20:13:24,410 INFO  L225             Difference]: With dead ends: 4442
[2023-04-02 20:13:24,410 INFO  L226             Difference]: Without dead ends: 2897
[2023-04-02 20:13:24,414 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2023-04-02 20:13:24,421 INFO  L413           NwaCegarLoop]: 15 mSDtfsCounter, 720 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time
[2023-04-02 20:13:24,422 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 43 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time]
[2023-04-02 20:13:24,425 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2897 states.
[2023-04-02 20:13:24,473 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2837.
[2023-04-02 20:13:24,477 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2837 states, 2782 states have (on average 1.445003594536305) internal successors, (4020), 2803 states have internal predecessors, (4020), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (217), 16 states have call predecessors, (217), 16 states have call successors, (217)
[2023-04-02 20:13:24,485 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 4254 transitions.
[2023-04-02 20:13:24,485 INFO  L78                 Accepts]: Start accepts. Automaton has 2837 states and 4254 transitions. Word has length 28
[2023-04-02 20:13:24,485 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 20:13:24,485 INFO  L495      AbstractCegarLoop]: Abstraction has 2837 states and 4254 transitions.
[2023-04-02 20:13:24,485 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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)
[2023-04-02 20:13:24,485 INFO  L276                IsEmpty]: Start isEmpty. Operand 2837 states and 4254 transitions.
[2023-04-02 20:13:24,486 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2023-04-02 20:13:24,486 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 20:13:24,487 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, 1, 1, 1, 1, 1, 1]
[2023-04-02 20:13:24,487 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-02 20:13:24,487 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 20:13:24,487 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 20:13:24,487 INFO  L85        PathProgramCache]: Analyzing trace with hash -198401537, now seen corresponding path program 1 times
[2023-04-02 20:13:24,487 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 20:13:24,487 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270866883]
[2023-04-02 20:13:24,487 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:13:24,488 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 20:13:24,503 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:13:24,556 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 20:13:24,556 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 20:13:24,556 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270866883]
[2023-04-02 20:13:24,556 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270866883] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-02 20:13:24,556 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-02 20:13:24,556 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-02 20:13:24,557 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541638087]
[2023-04-02 20:13:24,557 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-02 20:13:24,557 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-02 20:13:24,557 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 20:13:24,558 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-02 20:13:24,558 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-02 20:13:24,558 INFO  L87              Difference]: Start difference. First operand 2837 states and 4254 transitions. Second operand  has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 20:13:25,370 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 20:13:25,370 INFO  L93              Difference]: Finished difference Result 6986 states and 10600 transitions.
[2023-04-02 20:13:25,371 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-02 20:13:25,371 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 43
[2023-04-02 20:13:25,372 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 20:13:25,384 INFO  L225             Difference]: With dead ends: 6986
[2023-04-02 20:13:25,385 INFO  L226             Difference]: Without dead ends: 4154
[2023-04-02 20:13:25,392 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 20:13:25,394 INFO  L413           NwaCegarLoop]: 407 mSDtfsCounter, 266 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-04-02 20:13:25,398 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 423 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-04-02 20:13:25,401 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4154 states.
[2023-04-02 20:13:25,472 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3871.
[2023-04-02 20:13:25,476 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3871 states, 3804 states have (on average 1.3656677181913774) internal successors, (5195), 3827 states have internal predecessors, (5195), 22 states have call successors, (22), 22 states have call predecessors, (22), 44 states have return successors, (299), 21 states have call predecessors, (299), 21 states have call successors, (299)
[2023-04-02 20:13:25,487 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 5516 transitions.
[2023-04-02 20:13:25,488 INFO  L78                 Accepts]: Start accepts. Automaton has 3871 states and 5516 transitions. Word has length 43
[2023-04-02 20:13:25,488 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 20:13:25,488 INFO  L495      AbstractCegarLoop]: Abstraction has 3871 states and 5516 transitions.
[2023-04-02 20:13:25,488 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 20:13:25,488 INFO  L276                IsEmpty]: Start isEmpty. Operand 3871 states and 5516 transitions.
[2023-04-02 20:13:25,492 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2023-04-02 20:13:25,492 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 20:13:25,492 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-02 20:13:25,493 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-04-02 20:13:25,493 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 20:13:25,493 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 20:13:25,493 INFO  L85        PathProgramCache]: Analyzing trace with hash 1342134902, now seen corresponding path program 1 times
[2023-04-02 20:13:25,493 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 20:13:25,493 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733664693]
[2023-04-02 20:13:25,493 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:13:25,493 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 20:13:25,513 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:13:25,670 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2023-04-02 20:13:25,670 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 20:13:25,670 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733664693]
[2023-04-02 20:13:25,670 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733664693] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-02 20:13:25,670 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777922428]
[2023-04-02 20:13:25,670 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:13:25,670 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-02 20:13:25,671 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-02 20:13:25,687 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 20:13:25,697 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 20:13:25,768 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:13:25,770 INFO  L262         TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-02 20:13:25,774 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-02 20:13:25,828 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 20:13:25,828 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-04-02 20:13:25,829 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777922428] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-02 20:13:25,829 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-04-02 20:13:25,829 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5
[2023-04-02 20:13:25,829 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382786377]
[2023-04-02 20:13:25,829 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-02 20:13:25,829 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-02 20:13:25,829 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 20:13:25,830 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-02 20:13:25,830 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-04-02 20:13:25,830 INFO  L87              Difference]: Start difference. First operand 3871 states and 5516 transitions. Second operand  has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 20:13:26,512 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 20:13:26,513 INFO  L93              Difference]: Finished difference Result 4926 states and 6876 transitions.
[2023-04-02 20:13:26,513 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-02 20:13:26,513 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 52
[2023-04-02 20:13:26,513 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 20:13:26,528 INFO  L225             Difference]: With dead ends: 4926
[2023-04-02 20:13:26,528 INFO  L226             Difference]: Without dead ends: 4924
[2023-04-02 20:13:26,529 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-04-02 20:13:26,529 INFO  L413           NwaCegarLoop]: 137 mSDtfsCounter, 247 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-04-02 20:13:26,529 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 148 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-04-02 20:13:26,532 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4924 states.
[2023-04-02 20:13:26,593 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4924 to 3891.
[2023-04-02 20:13:26,598 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3891 states, 3820 states have (on average 1.3638743455497382) internal successors, (5210), 3841 states have internal predecessors, (5210), 25 states have call successors, (25), 25 states have call predecessors, (25), 45 states have return successors, (348), 24 states have call predecessors, (348), 24 states have call successors, (348)
[2023-04-02 20:13:26,605 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 5583 transitions.
[2023-04-02 20:13:26,606 INFO  L78                 Accepts]: Start accepts. Automaton has 3891 states and 5583 transitions. Word has length 52
[2023-04-02 20:13:26,606 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 20:13:26,607 INFO  L495      AbstractCegarLoop]: Abstraction has 3891 states and 5583 transitions.
[2023-04-02 20:13:26,607 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 20:13:26,607 INFO  L276                IsEmpty]: Start isEmpty. Operand 3891 states and 5583 transitions.
[2023-04-02 20:13:26,616 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 189
[2023-04-02 20:13:26,616 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 20:13:26,616 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2023-04-02 20:13:26,637 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2023-04-02 20:13:26,822 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-04-02 20:13:26,823 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 20:13:26,823 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 20:13:26,823 INFO  L85        PathProgramCache]: Analyzing trace with hash -399567564, now seen corresponding path program 1 times
[2023-04-02 20:13:26,823 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 20:13:26,823 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743323631]
[2023-04-02 20:13:26,823 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:13:26,824 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 20:13:26,914 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:13:27,116 INFO  L134       CoverageAnalysis]: Checked inductivity of 173 backedges. 73 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked.
[2023-04-02 20:13:27,117 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 20:13:27,117 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743323631]
[2023-04-02 20:13:27,117 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743323631] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-02 20:13:27,117 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035491473]
[2023-04-02 20:13:27,117 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 20:13:27,117 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-02 20:13:27,117 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-02 20:13:27,121 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-02 20:13:27,181 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-04-02 20:13:27,288 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 20:13:27,290 INFO  L262         TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-02 20:13:27,299 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-02 20:13:27,396 INFO  L134       CoverageAnalysis]: Checked inductivity of 173 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-02 20:13:27,396 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-02 20:13:27,579 INFO  L134       CoverageAnalysis]: Checked inductivity of 173 backedges. 73 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked.
[2023-04-02 20:13:27,579 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035491473] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-02 20:13:27,579 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604489837]
[2023-04-02 20:13:27,602 INFO  L159        IcfgInterpreter]: Started Sifa with 77 locations of interest
[2023-04-02 20:13:27,602 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-02 20:13:27,604 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-02 20:13:27,607 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-02 20:13:27,607 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-02 20:13:27,713 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs
[2023-04-02 20:13:27,888 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 51
[2023-04-02 20:13:47,372 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 278474 conjuctions. This might take some time...
[2023-04-02 20:14:31,127 INFO  L192   XnfTransformerHelper]: Simplified to disjunction of 1294 conjuctions. 
[2023-04-02 20:14:35,178 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 10
[2023-04-02 20:14:36,110 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 201960 conjuctions. This might take some time...