/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/Problem05_label36.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 09:34:19,218 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 09:34:19,220 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-01 09:34:19,257 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 09:34:19,260 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 09:34:19,262 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 09:34:19,264 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-04-01 09:34:19,270 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 09:34:19,271 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 09:34:19,277 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 09:34:19,277 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 09:34:19,278 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 09:34:19,280 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 09:34:19,284 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
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[2023-04-01 09:34:19,286 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-01 09:34:19,287 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 09:34:19,288 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 09:34:19,290 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-01 09:34:19,294 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
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[2023-04-01 09:34:19,296 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 09:34:19,297 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 09:34:19,298 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 09:34:19,324 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 09:34:19,324 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 09:34:19,325 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 09:34:19,325 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 09:34:19,326 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 09:34:19,326 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 09:34:19,326 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 09:34:19,326 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 09:34:19,326 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 09:34:19,326 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 09:34:19,327 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 09:34:19,327 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 09:34:19,327 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 09:34:19,327 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 09:34:19,327 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 09:34:19,327 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 09:34:19,327 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 09:34:19,327 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 09:34:19,328 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 09:34:19,328 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 09:34:19,328 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 09:34:19,328 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 09:34:19,328 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 09:34:19,328 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 09:34:19,329 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 09:34:19,329 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 09:34:19,329 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 09:34:19,329 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 09:34:19,329 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 09:34:19,329 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 09:34:19,330 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 09:34:19,330 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 09:34:19,330 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 09:34:19,330 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 09:34:19,330 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 09:34:19,330 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 09:34:19,330 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 09:34:19,330 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 09:34:19,330 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 09:34:19,330 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 09:34:19,331 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 09:34:19,331 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 09:34:19,516 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 09:34:19,536 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 09:34:19,537 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 09:34:19,538 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 09:34:19,539 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 09:34:19,540 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem05_label36.c
[2023-04-01 09:34:20,567 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 09:34:20,984 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 09:34:20,984 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem05_label36.c
[2023-04-01 09:34:21,027 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92f5c4c99/96d9fb82153e43c9863d8ae1ebe4ec40/FLAG3f4072ec2
[2023-04-01 09:34:21,042 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92f5c4c99/96d9fb82153e43c9863d8ae1ebe4ec40
[2023-04-01 09:34:21,044 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 09:34:21,045 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 09:34:21,046 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 09:34:21,046 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 09:34:21,048 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 09:34:21,049 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:34:21" (1/1) ...
[2023-04-01 09:34:21,050 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d7c41e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:34:21, skipping insertion in model container
[2023-04-01 09:34:21,050 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:34:21" (1/1) ...
[2023-04-01 09:34:21,054 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 09:34:21,213 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 09:34:22,278 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/Problem05_label36.c[376862,376875]
[2023-04-01 09:34:22,295 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 09:34:22,302 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 09:34:22,934 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/Problem05_label36.c[376862,376875]
[2023-04-01 09:34:22,940 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 09:34:22,976 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 09:34:22,976 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:34:22 WrapperNode
[2023-04-01 09:34:22,976 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 09:34:22,978 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 09:34:22,978 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 09:34:22,978 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 09:34:22,986 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:34:22" (1/1) ...
[2023-04-01 09:34:22,986 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:34:22" (1/1) ...
[2023-04-01 09:34:23,052 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:34:22" (1/1) ...
[2023-04-01 09:34:23,053 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:34:22" (1/1) ...
[2023-04-01 09:34:23,184 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:34:22" (1/1) ...
[2023-04-01 09:34:23,214 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:34:22" (1/1) ...
[2023-04-01 09:34:23,238 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:34:22" (1/1) ...
[2023-04-01 09:34:23,257 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:34:22" (1/1) ...
[2023-04-01 09:34:23,299 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 09:34:23,300 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 09:34:23,300 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 09:34:23,300 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 09:34:23,301 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:34:22" (1/1) ...
[2023-04-01 09:34:23,306 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 09:34:23,313 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 09:34:23,322 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 09:34:23,339 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 09:34:23,349 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 09:34:23,349 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 09:34:23,349 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 09:34:23,349 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 09:34:23,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 09:34:23,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-04-01 09:34:23,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2023-04-01 09:34:23,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output5
[2023-04-01 09:34:23,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output6
[2023-04-01 09:34:23,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output7
[2023-04-01 09:34:23,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output8
[2023-04-01 09:34:23,350 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 09:34:23,350 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 09:34:23,350 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 09:34:23,350 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-04-01 09:34:23,350 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2023-04-01 09:34:23,351 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output5
[2023-04-01 09:34:23,351 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output6
[2023-04-01 09:34:23,351 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output7
[2023-04-01 09:34:23,351 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output8
[2023-04-01 09:34:23,351 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 09:34:23,351 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 09:34:23,351 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 09:34:23,351 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 09:34:23,351 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 09:34:23,352 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 09:34:23,352 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 09:34:23,352 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 09:34:23,352 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 09:34:23,352 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 09:34:23,352 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 09:34:23,352 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 09:34:23,352 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 09:34:23,515 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 09:34:23,516 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 09:34:28,521 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 09:34:29,910 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 09:34:29,910 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 09:34:29,913 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:34:29 BoogieIcfgContainer
[2023-04-01 09:34:29,913 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 09:34:29,915 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 09:34:29,915 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 09:34:29,917 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 09:34:29,917 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:34:21" (1/3) ...
[2023-04-01 09:34:29,917 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5810be05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:34:29, skipping insertion in model container
[2023-04-01 09:34:29,917 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:34:22" (2/3) ...
[2023-04-01 09:34:29,918 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5810be05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:34:29, skipping insertion in model container
[2023-04-01 09:34:29,918 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:34:29" (3/3) ...
[2023-04-01 09:34:29,918 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem05_label36.c
[2023-04-01 09:34:29,930 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 09:34:29,930 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 09:34:29,985 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 09:34:29,990 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;@53a14c4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 09:34:29,990 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 09:34:29,998 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 1681 states, 1659 states have (on average 1.9825195901145267) internal successors, (3289), 1660 states have internal predecessors, (3289), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-01 09:34:30,068 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1652
[2023-04-01 09:34:30,069 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 09:34:30,070 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:34:30,071 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 09:34:30,074 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 09:34:30,075 INFO  L85        PathProgramCache]: Analyzing trace with hash 1963603160, now seen corresponding path program 1 times
[2023-04-01 09:34:30,080 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 09:34:30,080 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314973353]
[2023-04-01 09:34:30,081 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 09:34:30,081 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 09:34:30,532 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 09:34:36,688 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 09:34:36,688 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 09:34:36,689 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314973353]
[2023-04-01 09:34:36,689 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314973353] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 09:34:36,689 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 09:34:36,689 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 09:34:36,691 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887444749]
[2023-04-01 09:34:36,691 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 09:34:36,698 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 09:34:36,698 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 09:34:36,727 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 09:34:36,728 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 09:34:36,733 INFO  L87              Difference]: Start difference. First operand  has 1681 states, 1659 states have (on average 1.9825195901145267) internal successors, (3289), 1660 states have internal predecessors, (3289), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand  has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 09:34:42,101 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 09:34:42,102 INFO  L93              Difference]: Finished difference Result 5031 states and 9947 transitions.
[2023-04-01 09:34:42,105 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 09:34:42,106 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1651
[2023-04-01 09:34:42,116 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 09:34:42,192 INFO  L225             Difference]: With dead ends: 5031
[2023-04-01 09:34:42,192 INFO  L226             Difference]: Without dead ends: 3347
[2023-04-01 09:34:42,202 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 09:34:42,205 INFO  L413           NwaCegarLoop]: 481 mSDtfsCounter, 448 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 4783 mSolverCounterSat, 2295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 7078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2295 IncrementalHoareTripleChecker+Valid, 4783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time
[2023-04-01 09:34:42,206 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 529 Invalid, 7078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2295 Valid, 4783 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time]
[2023-04-01 09:34:42,246 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3347 states.
[2023-04-01 09:34:42,357 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 3347.
[2023-04-01 09:34:42,361 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3347 states, 3311 states have (on average 1.8302627604953186) internal successors, (6060), 3311 states have internal predecessors, (6060), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33)
[2023-04-01 09:34:42,369 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3347 states to 3347 states and 6111 transitions.
[2023-04-01 09:34:42,370 INFO  L78                 Accepts]: Start accepts. Automaton has 3347 states and 6111 transitions. Word has length 1651
[2023-04-01 09:34:42,372 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 09:34:42,373 INFO  L495      AbstractCegarLoop]: Abstraction has 3347 states and 6111 transitions.
[2023-04-01 09:34:42,373 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 09:34:42,374 INFO  L276                IsEmpty]: Start isEmpty. Operand 3347 states and 6111 transitions.
[2023-04-01 09:34:42,407 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1667
[2023-04-01 09:34:42,407 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 09:34:42,408 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:34:42,409 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 09:34:42,409 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 09:34:42,409 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 09:34:42,410 INFO  L85        PathProgramCache]: Analyzing trace with hash -43368310, now seen corresponding path program 1 times
[2023-04-01 09:34:42,410 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 09:34:42,410 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692946504]
[2023-04-01 09:34:42,410 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 09:34:42,410 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 09:34:42,571 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 09:34:44,809 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 09:34:44,810 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 09:34:44,810 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692946504]
[2023-04-01 09:34:44,811 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692946504] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 09:34:44,811 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 09:34:44,811 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 09:34:44,811 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724288427]
[2023-04-01 09:34:44,811 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 09:34:44,814 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 09:34:44,814 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 09:34:44,816 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 09:34:44,816 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 09:34:44,818 INFO  L87              Difference]: Start difference. First operand 3347 states and 6111 transitions. Second operand  has 5 states, 5 states have (on average 330.6) internal successors, (1653), 4 states have internal predecessors, (1653), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 09:34:51,356 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 09:34:51,356 INFO  L93              Difference]: Finished difference Result 10226 states and 18713 transitions.
[2023-04-01 09:34:51,357 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-04-01 09:34:51,357 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 330.6) internal successors, (1653), 4 states have internal predecessors, (1653), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 1666
[2023-04-01 09:34:51,358 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 09:34:51,382 INFO  L225             Difference]: With dead ends: 10226
[2023-04-01 09:34:51,382 INFO  L226             Difference]: Without dead ends: 6884
[2023-04-01 09:34:51,389 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 09:34:51,390 INFO  L413           NwaCegarLoop]: 72 mSDtfsCounter, 6821 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 8857 mSolverCounterSat, 3038 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6821 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 11895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3038 IncrementalHoareTripleChecker+Valid, 8857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time
[2023-04-01 09:34:51,390 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [6821 Valid, 189 Invalid, 11895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3038 Valid, 8857 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time]
[2023-04-01 09:34:51,397 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6884 states.
[2023-04-01 09:34:51,540 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6884 to 6819.
[2023-04-01 09:34:51,552 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6819 states, 6705 states have (on average 1.7027591349739) internal successors, (11417), 6711 states have internal predecessors, (11417), 34 states have call successors, (34), 34 states have call predecessors, (34), 79 states have return successors, (205), 73 states have call predecessors, (205), 33 states have call successors, (205)
[2023-04-01 09:34:51,568 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6819 states to 6819 states and 11656 transitions.
[2023-04-01 09:34:51,568 INFO  L78                 Accepts]: Start accepts. Automaton has 6819 states and 11656 transitions. Word has length 1666
[2023-04-01 09:34:51,568 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 09:34:51,568 INFO  L495      AbstractCegarLoop]: Abstraction has 6819 states and 11656 transitions.
[2023-04-01 09:34:51,569 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 330.6) internal successors, (1653), 4 states have internal predecessors, (1653), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 09:34:51,569 INFO  L276                IsEmpty]: Start isEmpty. Operand 6819 states and 11656 transitions.
[2023-04-01 09:34:51,610 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1693
[2023-04-01 09:34:51,610 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 09:34:51,611 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 09:34:51,611 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 09:34:51,611 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 09:34:51,611 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 09:34:51,612 INFO  L85        PathProgramCache]: Analyzing trace with hash 1544435960, now seen corresponding path program 1 times
[2023-04-01 09:34:51,612 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 09:34:51,612 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073768717]
[2023-04-01 09:34:51,612 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 09:34:51,612 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 09:34:51,782 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 09:34:53,650 INFO  L134       CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-04-01 09:34:53,650 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 09:34:53,650 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073768717]
[2023-04-01 09:34:53,650 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073768717] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 09:34:53,650 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723187660]
[2023-04-01 09:34:53,651 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 09:34:53,651 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 09:34:53,651 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 09:34:53,653 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 09:34:53,654 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 09:34:54,203 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 09:34:54,211 INFO  L262         TraceCheckSpWp]: Trace formula consists of 2189 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-04-01 09:34:54,236 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 09:34:54,330 INFO  L134       CoverageAnalysis]: Checked inductivity of 50 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2023-04-01 09:34:54,331 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-04-01 09:34:54,331 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723187660] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 09:34:54,331 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-04-01 09:34:54,331 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8
[2023-04-01 09:34:54,331 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107566193]
[2023-04-01 09:34:54,332 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 09:34:54,333 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 09:34:54,333 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 09:34:54,334 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 09:34:54,334 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56
[2023-04-01 09:34:54,335 INFO  L87              Difference]: Start difference. First operand 6819 states and 11656 transitions. Second operand  has 5 states, 5 states have (on average 333.2) internal successors, (1666), 4 states have internal predecessors, (1666), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 09:35:00,395 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 09:35:00,395 INFO  L93              Difference]: Finished difference Result 17399 states and 29531 transitions.
[2023-04-01 09:35:00,395 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 09:35:00,396 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 333.2) internal successors, (1666), 4 states have internal predecessors, (1666), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 1692
[2023-04-01 09:35:00,397 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 09:35:00,432 INFO  L225             Difference]: With dead ends: 17399
[2023-04-01 09:35:00,432 INFO  L226             Difference]: Without dead ends: 10585
[2023-04-01 09:35:00,446 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 1700 GetRequests, 1691 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-04-01 09:35:00,447 INFO  L413           NwaCegarLoop]: 87 mSDtfsCounter, 5626 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 9881 mSolverCounterSat, 1740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5626 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 11621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1740 IncrementalHoareTripleChecker+Valid, 9881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time
[2023-04-01 09:35:00,448 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [5626 Valid, 210 Invalid, 11621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1740 Valid, 9881 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time]
[2023-04-01 09:35:00,456 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10585 states.
[2023-04-01 09:35:00,602 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10585 to 10534.
[2023-04-01 09:35:00,626 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10534 states, 10257 states have (on average 1.5582529004582237) internal successors, (15983), 10281 states have internal predecessors, (15983), 50 states have call successors, (50), 50 states have call predecessors, (50), 226 states have return successors, (733), 202 states have call predecessors, (733), 49 states have call successors, (733)
[2023-04-01 09:35:00,643 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10534 states to 10534 states and 16766 transitions.
[2023-04-01 09:35:00,644 INFO  L78                 Accepts]: Start accepts. Automaton has 10534 states and 16766 transitions. Word has length 1692
[2023-04-01 09:35:00,644 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 09:35:00,644 INFO  L495      AbstractCegarLoop]: Abstraction has 10534 states and 16766 transitions.
[2023-04-01 09:35:00,646 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 333.2) internal successors, (1666), 4 states have internal predecessors, (1666), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 09:35:00,646 INFO  L276                IsEmpty]: Start isEmpty. Operand 10534 states and 16766 transitions.
[2023-04-01 09:35:00,683 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1692
[2023-04-01 09:35:00,683 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 09:35:00,684 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 09:35:00,705 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2023-04-01 09:35:00,892 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 09:35:00,892 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 09:35:00,893 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 09:35:00,893 INFO  L85        PathProgramCache]: Analyzing trace with hash 1370374119, now seen corresponding path program 1 times
[2023-04-01 09:35:00,894 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 09:35:00,894 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106675976]
[2023-04-01 09:35:00,894 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 09:35:00,894 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 09:35:01,213 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 09:35:02,901 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 09:35:02,902 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 09:35:02,902 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106675976]
[2023-04-01 09:35:02,902 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106675976] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 09:35:02,906 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 09:35:02,906 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 09:35:02,906 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827958373]
[2023-04-01 09:35:02,908 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 09:35:02,922 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 09:35:02,923 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 09:35:02,930 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 09:35:02,931 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 09:35:02,932 INFO  L87              Difference]: Start difference. First operand 10534 states and 16766 transitions. Second operand  has 5 states, 5 states have (on average 335.6) internal successors, (1678), 4 states have internal predecessors, (1678), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 09:35:10,259 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 09:35:10,260 INFO  L93              Difference]: Finished difference Result 32426 states and 54396 transitions.
[2023-04-01 09:35:10,260 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-04-01 09:35:10,261 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 335.6) internal successors, (1678), 4 states have internal predecessors, (1678), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 1691
[2023-04-01 09:35:10,261 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 09:35:10,334 INFO  L225             Difference]: With dead ends: 32426
[2023-04-01 09:35:10,334 INFO  L226             Difference]: Without dead ends: 21897
[2023-04-01 09:35:10,356 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 09:35:10,360 INFO  L413           NwaCegarLoop]: 101 mSDtfsCounter, 5704 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 9494 mSolverCounterSat, 3112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5704 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 12606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3112 IncrementalHoareTripleChecker+Valid, 9494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time
[2023-04-01 09:35:10,361 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [5704 Valid, 244 Invalid, 12606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3112 Valid, 9494 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time]
[2023-04-01 09:35:10,381 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21897 states.
[2023-04-01 09:35:10,828 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21897 to 21498.
[2023-04-01 09:35:10,854 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21498 states, 20792 states have (on average 1.509234320892651) internal successors, (31380), 20871 states have internal predecessors, (31380), 98 states have call successors, (98), 98 states have call predecessors, (98), 607 states have return successors, (3239), 528 states have call predecessors, (3239), 97 states have call successors, (3239)
[2023-04-01 09:35:10,889 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21498 states to 21498 states and 34717 transitions.
[2023-04-01 09:35:10,890 INFO  L78                 Accepts]: Start accepts. Automaton has 21498 states and 34717 transitions. Word has length 1691
[2023-04-01 09:35:10,890 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 09:35:10,890 INFO  L495      AbstractCegarLoop]: Abstraction has 21498 states and 34717 transitions.
[2023-04-01 09:35:10,891 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 335.6) internal successors, (1678), 4 states have internal predecessors, (1678), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 09:35:10,891 INFO  L276                IsEmpty]: Start isEmpty. Operand 21498 states and 34717 transitions.
[2023-04-01 09:35:10,953 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1693
[2023-04-01 09:35:10,954 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 09:35:10,954 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 09:35:10,955 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 09:35:10,955 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 09:35:10,956 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 09:35:10,958 INFO  L85        PathProgramCache]: Analyzing trace with hash 48910415, now seen corresponding path program 1 times
[2023-04-01 09:35:10,959 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 09:35:10,959 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696973560]
[2023-04-01 09:35:10,963 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 09:35:10,963 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 09:35:11,132 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 09:35:12,658 INFO  L134       CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 09:35:12,659 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 09:35:12,659 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696973560]
[2023-04-01 09:35:12,659 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696973560] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 09:35:12,659 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 09:35:12,659 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 09:35:12,659 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891181705]
[2023-04-01 09:35:12,659 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 09:35:12,661 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 09:35:12,661 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 09:35:12,662 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 09:35:12,662 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 09:35:12,662 INFO  L87              Difference]: Start difference. First operand 21498 states and 34717 transitions. Second operand  has 5 states, 5 states have (on average 335.8) internal successors, (1679), 4 states have internal predecessors, (1679), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 09:35:18,664 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 09:35:18,664 INFO  L93              Difference]: Finished difference Result 57355 states and 96243 transitions.
[2023-04-01 09:35:18,665 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 09:35:18,665 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 335.8) internal successors, (1679), 4 states have internal predecessors, (1679), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 1692
[2023-04-01 09:35:18,665 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 09:35:18,768 INFO  L225             Difference]: With dead ends: 57355
[2023-04-01 09:35:18,769 INFO  L226             Difference]: Without dead ends: 35862
[2023-04-01 09:35:18,800 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 09:35:18,801 INFO  L413           NwaCegarLoop]: 71 mSDtfsCounter, 8326 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 8249 mSolverCounterSat, 2401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8326 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 10650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2401 IncrementalHoareTripleChecker+Valid, 8249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time
[2023-04-01 09:35:18,801 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [8326 Valid, 186 Invalid, 10650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2401 Valid, 8249 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time]
[2023-04-01 09:35:18,831 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35862 states.