/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/Problem18_label29.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 04:27:16,863 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 04:27:16,865 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-01 04:27:16,892 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 04:27:16,893 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 04:27:16,894 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 04:27:16,895 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-04-01 04:27:16,898 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 04:27:16,899 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-01 04:27:16,900 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-01 04:27:16,900 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-04-01 04:27:16,903 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 04:27:16,903 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 04:27:16,904 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 04:27:16,905 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 04:27:16,907 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
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[2023-04-01 04:27:16,910 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 04:27:16,911 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 04:27:16,913 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-01 04:27:16,917 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-01 04:27:16,918 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
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[2023-04-01 04:27:16,920 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 04:27:16,921 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 04:27:16,922 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 04:27:16,949 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 04:27:16,950 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 04:27:16,951 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 04:27:16,951 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 04:27:16,952 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 04:27:16,952 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 04:27:16,952 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 04:27:16,952 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 04:27:16,953 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 04:27:16,953 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 04:27:16,953 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 04:27:16,954 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 04:27:16,954 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 04:27:16,954 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 04:27:16,954 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 04:27:16,954 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 04:27:16,954 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 04:27:16,955 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 04:27:16,955 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 04:27:16,955 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 04:27:16,956 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 04:27:16,956 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 04:27:16,956 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 04:27:16,956 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 04:27:16,956 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 04:27:16,956 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 04:27:16,956 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 04:27:16,957 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 04:27:16,957 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 04:27:16,957 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 04:27:16,957 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 04:27:16,957 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 04:27:16,958 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 04:27:16,958 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 04:27:16,958 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 04:27:16,958 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 04:27:16,958 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 04:27:16,958 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 04:27:16,958 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 04:27:16,958 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 04:27:16,959 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 04:27:16,959 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-01 04:27:17,150 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 04:27:17,168 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 04:27:17,170 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 04:27:17,171 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 04:27:17,172 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 04:27:17,173 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label29.c
[2023-04-01 04:27:18,333 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 04:27:18,776 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 04:27:18,776 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label29.c
[2023-04-01 04:27:18,801 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04993ecd9/b70e515fa60f45f2b29d0ed69291e51a/FLAG4991aec95
[2023-04-01 04:27:18,819 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04993ecd9/b70e515fa60f45f2b29d0ed69291e51a
[2023-04-01 04:27:18,822 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 04:27:18,824 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 04:27:18,829 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 04:27:18,829 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 04:27:18,832 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 04:27:18,833 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:27:18" (1/1) ...
[2023-04-01 04:27:18,835 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e0200e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:18, skipping insertion in model container
[2023-04-01 04:27:18,835 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:27:18" (1/1) ...
[2023-04-01 04:27:18,841 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 04:27:18,948 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 04:27:19,192 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/Problem18_label29.c[4270,4283]
[2023-04-01 04:27:19,717 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 04:27:19,733 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 04:27:19,761 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/Problem18_label29.c[4270,4283]
[2023-04-01 04:27:20,008 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 04:27:20,028 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 04:27:20,030 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:20 WrapperNode
[2023-04-01 04:27:20,030 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 04:27:20,031 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 04:27:20,031 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 04:27:20,032 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 04:27:20,042 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:20" (1/1) ...
[2023-04-01 04:27:20,043 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:20" (1/1) ...
[2023-04-01 04:27:20,094 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:20" (1/1) ...
[2023-04-01 04:27:20,094 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:20" (1/1) ...
[2023-04-01 04:27:20,179 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:20" (1/1) ...
[2023-04-01 04:27:20,206 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:20" (1/1) ...
[2023-04-01 04:27:20,220 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:20" (1/1) ...
[2023-04-01 04:27:20,233 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:20" (1/1) ...
[2023-04-01 04:27:20,251 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 04:27:20,252 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 04:27:20,252 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 04:27:20,253 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 04:27:20,254 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:20" (1/1) ...
[2023-04-01 04:27:20,261 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 04:27:20,273 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 04:27:20,286 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 04:27:20,294 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 04:27:20,324 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 04:27:20,324 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 04:27:20,324 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 04:27:20,324 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 04:27:20,324 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 04:27:20,325 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-04-01 04:27:20,325 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 04:27:20,325 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 04:27:20,325 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 04:27:20,325 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-04-01 04:27:20,325 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 04:27:20,325 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 04:27:20,325 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 04:27:20,325 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 04:27:20,325 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 04:27:20,325 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 04:27:20,326 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 04:27:20,326 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 04:27:20,326 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 04:27:20,326 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 04:27:20,326 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 04:27:20,326 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 04:27:20,326 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 04:27:20,397 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 04:27:20,400 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 04:27:23,304 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 04:27:31,191 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 04:27:31,191 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 04:27:31,194 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:27:31 BoogieIcfgContainer
[2023-04-01 04:27:31,195 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 04:27:31,197 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 04:27:31,197 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 04:27:31,200 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 04:27:31,200 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:27:18" (1/3) ...
[2023-04-01 04:27:31,200 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f69c429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:27:31, skipping insertion in model container
[2023-04-01 04:27:31,200 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:20" (2/3) ...
[2023-04-01 04:27:31,201 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f69c429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:27:31, skipping insertion in model container
[2023-04-01 04:27:31,201 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:27:31" (3/3) ...
[2023-04-01 04:27:31,202 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem18_label29.c
[2023-04-01 04:27:31,219 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 04:27:31,219 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 04:27:31,268 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 04:27:31,275 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;@5d35011, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 04:27:31,275 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 04:27:31,284 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2023-04-01 04:27:31,289 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 04:27:31,289 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:27:31,290 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 04:27:31,291 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:27:31,295 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:27:31,295 INFO  L85        PathProgramCache]: Analyzing trace with hash 314231555, now seen corresponding path program 1 times
[2023-04-01 04:27:31,304 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:27:31,304 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061099526]
[2023-04-01 04:27:31,304 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:27:31,305 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:27:31,445 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:27:31,641 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 04:27:31,641 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:27:31,641 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061099526]
[2023-04-01 04:27:31,642 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061099526] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 04:27:31,642 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 04:27:31,642 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 04:27:31,643 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157978836]
[2023-04-01 04:27:31,644 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 04:27:31,647 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 04:27:31,648 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 04:27:31,680 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 04:27:31,681 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 04:27:31,685 INFO  L87              Difference]: Start difference. First operand  has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 04:27:33,916 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 04:27:33,916 INFO  L93              Difference]: Finished difference Result 1393 states and 2727 transitions.
[2023-04-01 04:27:33,918 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 04:27:33,919 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2023-04-01 04:27:33,919 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 04:27:33,934 INFO  L225             Difference]: With dead ends: 1393
[2023-04-01 04:27:33,935 INFO  L226             Difference]: Without dead ends: 921
[2023-04-01 04:27:33,940 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 04:27:33,943 INFO  L413           NwaCegarLoop]: 318 mSDtfsCounter, 515 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time
[2023-04-01 04:27:33,944 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 339 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time]
[2023-04-01 04:27:33,959 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 921 states.
[2023-04-01 04:27:34,021 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919.
[2023-04-01 04:27:34,024 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 919 states, 905 states have (on average 1.6519337016574585) internal successors, (1495), 905 states have internal predecessors, (1495), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10)
[2023-04-01 04:27:34,028 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1512 transitions.
[2023-04-01 04:27:34,030 INFO  L78                 Accepts]: Start accepts. Automaton has 919 states and 1512 transitions. Word has length 11
[2023-04-01 04:27:34,030 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 04:27:34,030 INFO  L495      AbstractCegarLoop]: Abstraction has 919 states and 1512 transitions.
[2023-04-01 04:27:34,030 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 04:27:34,030 INFO  L276                IsEmpty]: Start isEmpty. Operand 919 states and 1512 transitions.
[2023-04-01 04:27:34,031 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2023-04-01 04:27:34,032 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:27:34,032 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 04:27:34,032 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 04:27:34,032 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:27:34,033 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:27:34,033 INFO  L85        PathProgramCache]: Analyzing trace with hash -1561592247, now seen corresponding path program 1 times
[2023-04-01 04:27:34,033 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:27:34,033 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080984466]
[2023-04-01 04:27:34,033 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:27:34,034 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:27:34,055 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:27:34,193 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 04:27:34,194 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:27:34,194 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080984466]
[2023-04-01 04:27:34,194 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080984466] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 04:27:34,194 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 04:27:34,194 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 04:27:34,195 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425783462]
[2023-04-01 04:27:34,195 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 04:27:34,196 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 04:27:34,196 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 04:27:34,196 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 04:27:34,197 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 04:27:34,197 INFO  L87              Difference]: Start difference. First operand 919 states and 1512 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)
[2023-04-01 04:27:37,010 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 04:27:37,010 INFO  L93              Difference]: Finished difference Result 2781 states and 4622 transitions.
[2023-04-01 04:27:37,011 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 04:27:37,011 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
[2023-04-01 04:27:37,011 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 04:27:37,023 INFO  L225             Difference]: With dead ends: 2781
[2023-04-01 04:27:37,023 INFO  L226             Difference]: Without dead ends: 1867
[2023-04-01 04:27:37,031 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 04:27:37,033 INFO  L413           NwaCegarLoop]: 35 mSDtfsCounter, 1548 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 3757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time
[2023-04-01 04:27:37,036 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 83 Invalid, 3757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time]
[2023-04-01 04:27:37,041 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1867 states.
[2023-04-01 04:27:37,132 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1822.
[2023-04-01 04:27:37,137 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1822 states, 1792 states have (on average 1.5412946428571428) internal successors, (2762), 1796 states have internal predecessors, (2762), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (50), 14 states have call predecessors, (50), 10 states have call successors, (50)
[2023-04-01 04:27:37,144 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2823 transitions.
[2023-04-01 04:27:37,145 INFO  L78                 Accepts]: Start accepts. Automaton has 1822 states and 2823 transitions. Word has length 21
[2023-04-01 04:27:37,145 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 04:27:37,145 INFO  L495      AbstractCegarLoop]: Abstraction has 1822 states and 2823 transitions.
[2023-04-01 04:27:37,145 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)
[2023-04-01 04:27:37,145 INFO  L276                IsEmpty]: Start isEmpty. Operand 1822 states and 2823 transitions.
[2023-04-01 04:27:37,146 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2023-04-01 04:27:37,146 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:27:37,146 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 04:27:37,146 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 04:27:37,146 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:27:37,147 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:27:37,147 INFO  L85        PathProgramCache]: Analyzing trace with hash 1749462145, now seen corresponding path program 1 times
[2023-04-01 04:27:37,147 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:27:37,148 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833414852]
[2023-04-01 04:27:37,148 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:27:37,148 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:27:37,177 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:27:37,335 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 04:27:37,335 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:27:37,335 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833414852]
[2023-04-01 04:27:37,336 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833414852] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 04:27:37,336 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 04:27:37,336 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 04:27:37,336 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226043631]
[2023-04-01 04:27:37,337 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 04:27:37,337 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 04:27:37,338 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 04:27:37,339 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 04:27:37,339 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 04:27:37,339 INFO  L87              Difference]: Start difference. First operand 1822 states and 2823 transitions. Second operand  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 04:27:39,975 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 04:27:39,976 INFO  L93              Difference]: Finished difference Result 5051 states and 8054 transitions.
[2023-04-01 04:27:39,978 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 04:27:39,978 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25
[2023-04-01 04:27:39,979 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 04:27:39,994 INFO  L225             Difference]: With dead ends: 5051
[2023-04-01 04:27:39,995 INFO  L226             Difference]: Without dead ends: 3234
[2023-04-01 04:27:40,000 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 04:27:40,002 INFO  L413           NwaCegarLoop]: 25 mSDtfsCounter, 1718 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time
[2023-04-01 04:27:40,002 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 66 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time]
[2023-04-01 04:27:40,005 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3234 states.
[2023-04-01 04:27:40,068 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 3207.
[2023-04-01 04:27:40,072 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3207 states, 3152 states have (on average 1.3981598984771573) internal successors, (4407), 3163 states have internal predecessors, (4407), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (145), 26 states have call predecessors, (145), 16 states have call successors, (145)
[2023-04-01 04:27:40,086 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4569 transitions.
[2023-04-01 04:27:40,087 INFO  L78                 Accepts]: Start accepts. Automaton has 3207 states and 4569 transitions. Word has length 25
[2023-04-01 04:27:40,087 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 04:27:40,087 INFO  L495      AbstractCegarLoop]: Abstraction has 3207 states and 4569 transitions.
[2023-04-01 04:27:40,087 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 04:27:40,087 INFO  L276                IsEmpty]: Start isEmpty. Operand 3207 states and 4569 transitions.
[2023-04-01 04:27:40,090 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2023-04-01 04:27:40,090 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:27:40,090 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, 1, 1, 1, 1, 1, 1]
[2023-04-01 04:27:40,090 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 04:27:40,090 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:27:40,091 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:27:40,091 INFO  L85        PathProgramCache]: Analyzing trace with hash -715966410, now seen corresponding path program 1 times
[2023-04-01 04:27:40,092 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:27:40,092 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470406814]
[2023-04-01 04:27:40,092 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:27:40,092 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:27:40,118 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:27:40,240 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 04:27:40,241 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:27:40,241 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470406814]
[2023-04-01 04:27:40,241 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470406814] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 04:27:40,241 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 04:27:40,241 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 04:27:40,241 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246079617]
[2023-04-01 04:27:40,242 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 04:27:40,243 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 04:27:40,243 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 04:27:40,244 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 04:27:40,244 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 04:27:40,244 INFO  L87              Difference]: Start difference. First operand 3207 states and 4569 transitions. Second operand  has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-04-01 04:27:41,805 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 04:27:41,805 INFO  L93              Difference]: Finished difference Result 6434 states and 9164 transitions.
[2023-04-01 04:27:41,810 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 04:27:41,810 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 58
[2023-04-01 04:27:41,811 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 04:27:41,825 INFO  L225             Difference]: With dead ends: 6434
[2023-04-01 04:27:41,825 INFO  L226             Difference]: Without dead ends: 3232
[2023-04-01 04:27:41,833 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 04:27:41,837 INFO  L413           NwaCegarLoop]: 764 mSDtfsCounter, 503 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time
[2023-04-01 04:27:41,838 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 786 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time]
[2023-04-01 04:27:41,842 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3232 states.
[2023-04-01 04:27:41,992 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3207.
[2023-04-01 04:27:41,997 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3207 states, 3152 states have (on average 1.3651649746192893) internal successors, (4303), 3163 states have internal predecessors, (4303), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (132), 26 states have call predecessors, (132), 16 states have call successors, (132)
[2023-04-01 04:27:42,012 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4452 transitions.
[2023-04-01 04:27:42,012 INFO  L78                 Accepts]: Start accepts. Automaton has 3207 states and 4452 transitions. Word has length 58
[2023-04-01 04:27:42,013 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 04:27:42,013 INFO  L495      AbstractCegarLoop]: Abstraction has 3207 states and 4452 transitions.
[2023-04-01 04:27:42,013 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-04-01 04:27:42,014 INFO  L276                IsEmpty]: Start isEmpty. Operand 3207 states and 4452 transitions.
[2023-04-01 04:27:42,018 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 69
[2023-04-01 04:27:42,018 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:27:42,018 INFO  L195           NwaCegarLoop]: trace histogram [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, 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 04:27:42,019 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 04:27:42,019 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:27:42,020 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:27:42,020 INFO  L85        PathProgramCache]: Analyzing trace with hash 288343996, now seen corresponding path program 1 times
[2023-04-01 04:27:42,020 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:27:42,020 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317276167]
[2023-04-01 04:27:42,021 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:27:42,021 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:27:42,071 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:27:42,248 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2023-04-01 04:27:42,248 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:27:42,249 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317276167]
[2023-04-01 04:27:42,249 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317276167] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 04:27:42,249 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 04:27:42,249 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 04:27:42,249 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878388608]
[2023-04-01 04:27:42,249 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 04:27:42,250 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 04:27:42,250 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 04:27:42,250 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 04:27:42,250 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 04:27:42,251 INFO  L87              Difference]: Start difference. First operand 3207 states and 4452 transitions. Second operand  has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)
[2023-04-01 04:27:44,082 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 04:27:44,082 INFO  L93              Difference]: Finished difference Result 9124 states and 12522 transitions.
[2023-04-01 04:27:44,088 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 04:27:44,088 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68
[2023-04-01 04:27:44,094 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 04:27:44,121 INFO  L225             Difference]: With dead ends: 9124
[2023-04-01 04:27:44,122 INFO  L226             Difference]: Without dead ends: 5922
[2023-04-01 04:27:44,132 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 04:27:44,135 INFO  L413           NwaCegarLoop]: 427 mSDtfsCounter, 458 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time
[2023-04-01 04:27:44,135 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 443 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time]
[2023-04-01 04:27:44,141 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5922 states.
[2023-04-01 04:27:44,249 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5922 to 5756.
[2023-04-01 04:27:44,259 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5756 states, 5670 states have (on average 1.2407407407407407) internal successors, (7035), 5686 states have internal predecessors, (7035), 29 states have call successors, (29), 29 states have call predecessors, (29), 56 states have return successors, (264), 40 states have call predecessors, (264), 28 states have call successors, (264)
[2023-04-01 04:27:44,275 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 7328 transitions.
[2023-04-01 04:27:44,276 INFO  L78                 Accepts]: Start accepts. Automaton has 5756 states and 7328 transitions. Word has length 68
[2023-04-01 04:27:44,276 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 04:27:44,276 INFO  L495      AbstractCegarLoop]: Abstraction has 5756 states and 7328 transitions.
[2023-04-01 04:27:44,277 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)
[2023-04-01 04:27:44,277 INFO  L276                IsEmpty]: Start isEmpty. Operand 5756 states and 7328 transitions.
[2023-04-01 04:27:44,282 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 109
[2023-04-01 04:27:44,282 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:27:44,282 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2023-04-01 04:27:44,282 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-04-01 04:27:44,282 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:27:44,283 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:27:44,283 INFO  L85        PathProgramCache]: Analyzing trace with hash -1039083610, now seen corresponding path program 1 times
[2023-04-01 04:27:44,283 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:27:44,283 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822912578]
[2023-04-01 04:27:44,283 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:27:44,284 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:27:44,316 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:27:44,505 INFO  L134       CoverageAnalysis]: Checked inductivity of 63 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2023-04-01 04:27:44,505 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:27:44,505 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822912578]
[2023-04-01 04:27:44,506 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822912578] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 04:27:44,506 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411028930]
[2023-04-01 04:27:44,506 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:27:44,506 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 04:27:44,506 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 04:27:44,531 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 04:27:44,585 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 04:27:44,706 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:27:44,710 INFO  L262         TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 04:27:44,715 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 04:27:44,807 INFO  L134       CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 04:27:44,807 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 04:27:44,983 INFO  L134       CoverageAnalysis]: Checked inductivity of 63 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2023-04-01 04:27:44,983 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411028930] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 04:27:44,983 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [583760491]
[2023-04-01 04:27:45,006 INFO  L159        IcfgInterpreter]: Started Sifa with 70 locations of interest
[2023-04-01 04:27:45,006 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 04:27:45,016 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 04:27:45,021 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 04:27:45,021 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 04:27:45,250 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs
[2023-04-01 04:27:45,534 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 33
[2023-04-01 04:27:59,055 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 204878 conjuctions. This might take some time...