/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/loops/sum03-1.i


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-02 22:00:22,543 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-02 22:00:22,545 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-04-02 22:00:22,584 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-04-02 22:00:22,584 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-02 22:00:22,587 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-02 22:00:22,590 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-02 22:00:22,592 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-02 22:00:22,593 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-02 22:00:22,597 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-02 22:00:22,599 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-02 22:00:22,600 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-02 22:00:22,600 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-02 22:00:22,602 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-04-02 22:00:22,603 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-02 22:00:22,604 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-02 22:00:22,605 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-02 22:00:22,606 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-02 22:00:22,607 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-02 22:00:22,612 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-02 22:00:22,612 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-02 22:00:22,613 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-02 22:00:22,614 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-02 22:00:22,615 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-02 22:00:22,623 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2023-04-02 22:00:22,623 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2023-04-02 22:00:22,624 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-04-02 22:00:22,625 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2023-04-02 22:00:22,625 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2023-04-02 22:00:22,626 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-04-02 22:00:22,626 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-04-02 22:00:22,627 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-04-02 22:00:22,628 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-02 22:00:22,628 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-02 22:00:22,629 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-04-02 22:00:22,629 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2023-04-02 22:00:22,630 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2023-04-02 22:00:22,630 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2023-04-02 22:00:22,630 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2023-04-02 22:00:22,631 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2023-04-02 22:00:22,631 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-02 22:00:22,632 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2023-04-02 22:00:22,660 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-02 22:00:22,660 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-02 22:00:22,661 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-02 22:00:22,661 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-02 22:00:22,662 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-02 22:00:22,662 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-02 22:00:22,662 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-02 22:00:22,662 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-02 22:00:22,662 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-02 22:00:22,663 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-02 22:00:22,663 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-02 22:00:22,663 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-02 22:00:22,664 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-02 22:00:22,664 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-02 22:00:22,664 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-02 22:00:22,664 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-02 22:00:22,664 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-02 22:00:22,664 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-02 22:00:22,665 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-02 22:00:22,665 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-02 22:00:22,665 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-02 22:00:22,665 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-02 22:00:22,666 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-02 22:00:22,666 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-02 22:00:22,666 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-02 22:00:22,666 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-02 22:00:22,667 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-02 22:00:22,667 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-02 22:00:22,667 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-02 22:00:22,667 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-02 22:00:22,667 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-02 22:00:22,667 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-02 22:00:22,668 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-02 22:00:22,668 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-02 22:00:22,668 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-02 22:00:22,668 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-02 22:00:22,668 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-02 22:00:22,668 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-02 22:00:22,669 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-02 22:00:22,669 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-02 22:00:22,669 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-02 22:00:22,669 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-02 22:00:22,889 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-02 22:00:22,912 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-02 22:00:22,914 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-02 22:00:22,915 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-02 22:00:22,916 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-02 22:00:22,917 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum03-1.i
[2023-04-02 22:00:24,102 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-02 22:00:24,241 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-02 22:00:24,242 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum03-1.i
[2023-04-02 22:00:24,247 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f36c0f539/c448eb9f62af475f85c9fb48a5d52f47/FLAG55268cc6f
[2023-04-02 22:00:24,258 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f36c0f539/c448eb9f62af475f85c9fb48a5d52f47
[2023-04-02 22:00:24,260 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-02 22:00:24,262 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-02 22:00:24,263 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-02 22:00:24,263 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-02 22:00:24,265 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-02 22:00:24,266 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:00:24" (1/1) ...
[2023-04-02 22:00:24,267 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18cd987c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:00:24, skipping insertion in model container
[2023-04-02 22:00:24,267 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:00:24" (1/1) ...
[2023-04-02 22:00:24,272 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-02 22:00:24,283 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-02 22:00:24,386 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/loops/sum03-1.i[807,820]
[2023-04-02 22:00:24,395 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-02 22:00:24,403 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-02 22:00:24,413 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/loops/sum03-1.i[807,820]
[2023-04-02 22:00:24,416 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-02 22:00:24,427 INFO  L208         MainTranslator]: Completed translation
[2023-04-02 22:00:24,427 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:00:24 WrapperNode
[2023-04-02 22:00:24,428 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-02 22:00:24,428 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-02 22:00:24,429 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-02 22:00:24,429 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-02 22:00:24,438 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:00:24" (1/1) ...
[2023-04-02 22:00:24,438 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:00:24" (1/1) ...
[2023-04-02 22:00:24,443 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:00:24" (1/1) ...
[2023-04-02 22:00:24,444 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:00:24" (1/1) ...
[2023-04-02 22:00:24,447 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:00:24" (1/1) ...
[2023-04-02 22:00:24,450 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:00:24" (1/1) ...
[2023-04-02 22:00:24,451 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:00:24" (1/1) ...
[2023-04-02 22:00:24,452 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:00:24" (1/1) ...
[2023-04-02 22:00:24,454 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-02 22:00:24,454 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-02 22:00:24,454 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-02 22:00:24,455 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-02 22:00:24,455 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:00:24" (1/1) ...
[2023-04-02 22:00:24,460 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-02 22:00:24,468 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-02 22:00:24,480 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-04-02 22:00:24,482 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-04-02 22:00:24,508 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-02 22:00:24,509 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-02 22:00:24,509 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-02 22:00:24,509 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2023-04-02 22:00:24,509 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-02 22:00:24,509 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-02 22:00:24,509 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-02 22:00:24,510 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_perror_fail
[2023-04-02 22:00:24,510 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert
[2023-04-02 22:00:24,510 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-02 22:00:24,510 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-02 22:00:24,510 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2023-04-02 22:00:24,510 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint
[2023-04-02 22:00:24,510 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-02 22:00:24,510 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-02 22:00:24,511 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-02 22:00:24,511 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-02 22:00:24,511 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-02 22:00:24,511 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-02 22:00:24,511 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-02 22:00:24,578 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-02 22:00:24,580 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-02 22:00:24,671 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-02 22:00:24,701 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-02 22:00:24,701 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-02 22:00:24,704 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:00:24 BoogieIcfgContainer
[2023-04-02 22:00:24,704 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-02 22:00:24,706 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-02 22:00:24,706 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-02 22:00:24,710 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-02 22:00:24,711 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:00:24" (1/3) ...
[2023-04-02 22:00:24,711 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd6d489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:00:24, skipping insertion in model container
[2023-04-02 22:00:24,711 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:00:24" (2/3) ...
[2023-04-02 22:00:24,712 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd6d489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:00:24, skipping insertion in model container
[2023-04-02 22:00:24,712 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:00:24" (3/3) ...
[2023-04-02 22:00:24,713 INFO  L112   eAbstractionObserver]: Analyzing ICFG sum03-1.i
[2023-04-02 22:00:24,729 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-02 22:00:24,729 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-02 22:00:24,785 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-02 22:00:24,791 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;@3c4c8591, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-02 22:00:24,792 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-02 22:00:24,795 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 16 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-02 22:00:24,804 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2023-04-02 22:00:24,804 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 22:00:24,805 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-02 22:00:24,805 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 22:00:24,812 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 22:00:24,813 INFO  L85        PathProgramCache]: Analyzing trace with hash -1588842388, now seen corresponding path program 1 times
[2023-04-02 22:00:24,821 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 22:00:24,822 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734253619]
[2023-04-02 22:00:24,822 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 22:00:24,822 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 22:00:24,992 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 22:00:25,596 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 22:00:25,597 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 22:00:25,597 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734253619]
[2023-04-02 22:00:25,598 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734253619] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-02 22:00:25,598 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-02 22:00:25,598 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-04-02 22:00:25,599 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37565990]
[2023-04-02 22:00:25,605 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-02 22:00:25,609 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-04-02 22:00:25,609 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 22:00:25,652 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-04-02 22:00:25,652 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2023-04-02 22:00:25,654 INFO  L87              Difference]: Start difference. First operand  has 16 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand  has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-02 22:00:25,799 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 22:00:25,799 INFO  L93              Difference]: Finished difference Result 31 states and 39 transitions.
[2023-04-02 22:00:25,802 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-02 22:00:25,803 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 10
[2023-04-02 22:00:25,803 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 22:00:25,808 INFO  L225             Difference]: With dead ends: 31
[2023-04-02 22:00:25,808 INFO  L226             Difference]: Without dead ends: 20
[2023-04-02 22:00:25,810 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2023-04-02 22:00:25,813 INFO  L413           NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-02 22:00:25,814 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-02 22:00:25,825 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2023-04-02 22:00:25,836 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19.
[2023-04-02 22:00:25,837 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-02 22:00:25,838 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions.
[2023-04-02 22:00:25,839 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10
[2023-04-02 22:00:25,839 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 22:00:25,839 INFO  L495      AbstractCegarLoop]: Abstraction has 19 states and 19 transitions.
[2023-04-02 22:00:25,840 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-02 22:00:25,840 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions.
[2023-04-02 22:00:25,840 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2023-04-02 22:00:25,840 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 22:00:25,841 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-02 22:00:25,841 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-02 22:00:25,841 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 22:00:25,842 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 22:00:25,842 INFO  L85        PathProgramCache]: Analyzing trace with hash 1442517707, now seen corresponding path program 1 times
[2023-04-02 22:00:25,842 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 22:00:25,842 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397903999]
[2023-04-02 22:00:25,842 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 22:00:25,842 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 22:00:25,865 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 22:00:26,229 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 22:00:26,229 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 22:00:26,230 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397903999]
[2023-04-02 22:00:26,230 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397903999] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-02 22:00:26,230 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13815461]
[2023-04-02 22:00:26,230 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 22:00:26,231 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-02 22:00:26,231 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-02 22:00:26,234 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-02 22:00:26,236 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-02 22:00:26,319 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 22:00:26,321 INFO  L262         TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core
[2023-04-02 22:00:26,326 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-02 22:00:26,428 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 22:00:26,429 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-02 22:00:26,916 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 22:00:26,917 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [13815461] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-02 22:00:26,917 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1975557097]
[2023-04-02 22:00:26,933 INFO  L159        IcfgInterpreter]: Started Sifa with 13 locations of interest
[2023-04-02 22:00:26,933 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-02 22:00:26,935 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-02 22:00:26,939 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-02 22:00:26,940 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-02 22:00:26,986 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs
[2023-04-02 22:00:27,138 INFO  L197        IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs
[2023-04-02 22:00:27,178 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs
[2023-04-02 22:00:27,183 INFO  L180        IcfgInterpreter]: Interpretation finished
[2023-04-02 22:00:27,497 INFO  L133             SifaRunner]: Sifa could not show that error location is unreachable, found '208#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location
[2023-04-02 22:00:27,498 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED
[2023-04-02 22:00:27,498 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-04-02 22:00:27,498 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14
[2023-04-02 22:00:27,499 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053778816]
[2023-04-02 22:00:27,499 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-04-02 22:00:27,500 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2023-04-02 22:00:27,500 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 22:00:27,501 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2023-04-02 22:00:27,501 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506
[2023-04-02 22:00:27,502 INFO  L87              Difference]: Start difference. First operand 19 states and 19 transitions. Second operand  has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-04-02 22:00:31,040 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 22:00:31,041 INFO  L93              Difference]: Finished difference Result 34 states and 37 transitions.
[2023-04-02 22:00:31,041 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2023-04-02 22:00:31,041 INFO  L78                 Accepts]: Start accepts. Automaton has  has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16
[2023-04-02 22:00:31,042 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 22:00:31,043 INFO  L225             Difference]: With dead ends: 34
[2023-04-02 22:00:31,043 INFO  L226             Difference]: Without dead ends: 32
[2023-04-02 22:00:31,044 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650
[2023-04-02 22:00:31,045 INFO  L413           NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2023-04-02 22:00:31,045 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 54 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2023-04-02 22:00:31,046 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2023-04-02 22:00:31,055 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31.
[2023-04-02 22:00:31,056 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7)
[2023-04-02 22:00:31,057 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions.
[2023-04-02 22:00:31,057 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 16
[2023-04-02 22:00:31,057 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 22:00:31,057 INFO  L495      AbstractCegarLoop]: Abstraction has 31 states and 34 transitions.
[2023-04-02 22:00:31,057 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-04-02 22:00:31,058 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions.
[2023-04-02 22:00:31,059 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2023-04-02 22:00:31,059 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 22:00:31,059 INFO  L195           NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1]
[2023-04-02 22:00:31,068 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-04-02 22:00:31,264 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-02 22:00:31,265 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 22:00:31,266 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 22:00:31,266 INFO  L85        PathProgramCache]: Analyzing trace with hash 507370439, now seen corresponding path program 2 times
[2023-04-02 22:00:31,266 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 22:00:31,266 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648818052]
[2023-04-02 22:00:31,266 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 22:00:31,266 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 22:00:31,325 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 22:00:31,891 INFO  L134       CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2023-04-02 22:00:31,892 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 22:00:31,892 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648818052]
[2023-04-02 22:00:31,893 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648818052] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-02 22:00:31,894 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633939788]
[2023-04-02 22:00:31,894 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2023-04-02 22:00:31,894 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-02 22:00:31,894 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-02 22:00:31,895 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-02 22:00:31,906 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-04-02 22:00:32,345 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2023-04-02 22:00:32,345 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-04-02 22:00:32,347 INFO  L262         TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 43 conjunts are in the unsatisfiable core
[2023-04-02 22:00:32,350 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-02 22:00:32,675 INFO  L134       CoverageAnalysis]: Checked inductivity of 80 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked.
[2023-04-02 22:00:32,675 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-02 22:00:39,292 INFO  L134       CoverageAnalysis]: Checked inductivity of 80 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked.
[2023-04-02 22:00:39,293 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633939788] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-02 22:00:39,293 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241704136]
[2023-04-02 22:00:39,295 INFO  L159        IcfgInterpreter]: Started Sifa with 13 locations of interest
[2023-04-02 22:00:39,295 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-02 22:00:39,295 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-02 22:00:39,296 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-02 22:00:39,296 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-02 22:00:39,311 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs
[2023-04-02 22:00:39,410 INFO  L197        IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs
[2023-04-02 22:00:39,443 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs
[2023-04-02 22:00:39,446 INFO  L180        IcfgInterpreter]: Interpretation finished
[2023-04-02 22:00:39,890 INFO  L133             SifaRunner]: Sifa could not show that error location is unreachable, found '590#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location
[2023-04-02 22:00:39,891 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED
[2023-04-02 22:00:39,891 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-04-02 22:00:39,891 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 14] total 26
[2023-04-02 22:00:39,891 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645117036]
[2023-04-02 22:00:39,891 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-04-02 22:00:39,892 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 26 states
[2023-04-02 22:00:39,892 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 22:00:39,893 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2023-04-02 22:00:39,893 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190
[2023-04-02 22:00:39,894 INFO  L87              Difference]: Start difference. First operand 31 states and 34 transitions. Second operand  has 26 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 15 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14)
[2023-04-02 22:00:59,531 WARN  L223               SmtUtils]: Spent 11.60s on a formula simplification. DAG size of input: 88 DAG size of output: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2023-04-02 22:01:02,271 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2023-04-02 22:01:04,222 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2023-04-02 22:01:33,277 WARN  L223               SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 75 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2023-04-02 22:01:45,011 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2023-04-02 22:02:05,388 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 22:02:05,389 INFO  L93              Difference]: Finished difference Result 53 states and 63 transitions.
[2023-04-02 22:02:05,392 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2023-04-02 22:02:05,393 INFO  L78                 Accepts]: Start accepts. Automaton has  has 26 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 15 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 40
[2023-04-02 22:02:05,393 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 22:02:05,395 INFO  L225             Difference]: With dead ends: 53
[2023-04-02 22:02:05,395 INFO  L226             Difference]: Without dead ends: 51
[2023-04-02 22:02:05,396 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 79.6s TimeCoverageRelationStatistics Valid=326, Invalid=1646, Unknown=8, NotChecked=0, Total=1980
[2023-04-02 22:02:05,397 INFO  L413           NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time
[2023-04-02 22:02:05,400 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 73 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time]
[2023-04-02 22:02:05,401 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2023-04-02 22:02:05,414 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51.
[2023-04-02 22:02:05,415 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 51 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15)
[2023-04-02 22:02:05,416 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions.
[2023-04-02 22:02:05,416 INFO  L78                 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 40
[2023-04-02 22:02:05,417 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 22:02:05,417 INFO  L495      AbstractCegarLoop]: Abstraction has 51 states and 61 transitions.
[2023-04-02 22:02:05,417 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 26 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 15 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14)
[2023-04-02 22:02:05,417 INFO  L276                IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions.
[2023-04-02 22:02:05,419 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2023-04-02 22:02:05,419 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 22:02:05,419 INFO  L195           NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1]
[2023-04-02 22:02:05,428 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-04-02 22:02:05,625 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2023-04-02 22:02:05,625 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 22:02:05,626 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 22:02:05,626 INFO  L85        PathProgramCache]: Analyzing trace with hash 200373730, now seen corresponding path program 3 times
[2023-04-02 22:02:05,626 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 22:02:05,626 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23352539]
[2023-04-02 22:02:05,626 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 22:02:05,626 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 22:02:05,714 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2023-04-02 22:02:05,714 INFO  L356             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2023-04-02 22:02:05,796 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2023-04-02 22:02:05,820 INFO  L130   FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace
[2023-04-02 22:02:05,821 INFO  L360         BasicCegarLoop]: Counterexample is feasible
[2023-04-02 22:02:05,822 INFO  L805   garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2023-04-02 22:02:05,823 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-02 22:02:05,826 INFO  L445         BasicCegarLoop]: Path program histogram: [3, 1]
[2023-04-02 22:02:05,832 INFO  L178   ceAbstractionStarter]: Computing trace abstraction results
[2023-04-02 22:02:05,860 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 10:02:05 BoogieIcfgContainer
[2023-04-02 22:02:05,860 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2023-04-02 22:02:05,861 INFO  L158              Benchmark]: Toolchain (without parser) took 101599.06ms. Allocated memory was 328.2MB in the beginning and 394.3MB in the end (delta: 66.1MB). Free memory was 276.1MB in the beginning and 157.6MB in the end (delta: 118.5MB). Peak memory consumption was 185.8MB. Max. memory is 8.0GB.
[2023-04-02 22:02:05,861 INFO  L158              Benchmark]: CDTParser took 0.11ms. Allocated memory is still 210.8MB. Free memory was 158.3MB in the beginning and 158.2MB in the end (delta: 70.5kB). There was no memory consumed. Max. memory is 8.0GB.
[2023-04-02 22:02:05,861 INFO  L158              Benchmark]: CACSL2BoogieTranslator took 165.30ms. Allocated memory is still 328.2MB. Free memory was 276.1MB in the beginning and 266.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
[2023-04-02 22:02:05,861 INFO  L158              Benchmark]: Boogie Preprocessor took 25.17ms. Allocated memory is still 328.2MB. Free memory was 266.0MB in the beginning and 264.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
[2023-04-02 22:02:05,862 INFO  L158              Benchmark]: RCFGBuilder took 249.66ms. Allocated memory is still 328.2MB. Free memory was 264.6MB in the beginning and 253.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
[2023-04-02 22:02:05,862 INFO  L158              Benchmark]: TraceAbstraction took 101154.26ms. Allocated memory was 328.2MB in the beginning and 394.3MB in the end (delta: 66.1MB). Free memory was 252.4MB in the beginning and 157.6MB in the end (delta: 94.7MB). Peak memory consumption was 161.7MB. Max. memory is 8.0GB.
[2023-04-02 22:02:05,863 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.11ms. Allocated memory is still 210.8MB. Free memory was 158.3MB in the beginning and 158.2MB in the end (delta: 70.5kB). There was no memory consumed. Max. memory is 8.0GB.
 * CACSL2BoogieTranslator took 165.30ms. Allocated memory is still 328.2MB. Free memory was 276.1MB in the beginning and 266.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
 * Boogie Preprocessor took 25.17ms. Allocated memory is still 328.2MB. Free memory was 266.0MB in the beginning and 264.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
 * RCFGBuilder took 249.66ms. Allocated memory is still 328.2MB. Free memory was 264.6MB in the beginning and 253.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
 * TraceAbstraction took 101154.26ms. Allocated memory was 328.2MB in the beginning and 394.3MB in the end (delta: 66.1MB). Free memory was 252.4MB in the beginning and 157.6MB in the end (delta: 94.7MB). Peak memory consumption was 161.7MB. Max. memory is 8.0GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - StatisticsResult: ErrorAutomatonStatistics
    NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
  - CounterExampleResult [Line: 15]: a call to reach_error is reachable
    a call to reach_error is reachable
We found a FailurePath: 
[L21]              int sn=0;
[L22]              unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint();
[L22]              unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint();
[L23]              unsigned int x=0;
       VAL         [sn=0, x=0]
[L24]  COND TRUE   1
[L25]  COND TRUE   x<10
[L26]              sn = sn + (2)
[L28]              x++
       VAL         [sn=2, x=1]
[L29]  CALL        __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [\old(cond)=1]
[L14]  COND FALSE  !(!(cond))
       VAL         [\old(cond)=1, cond=1]
[L29]  RET         __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [sn=2, x=1]
[L24]  COND TRUE   1
[L25]  COND TRUE   x<10
[L26]              sn = sn + (2)
[L28]              x++
       VAL         [sn=4, x=2]
[L29]  CALL        __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [\old(cond)=1]
[L14]  COND FALSE  !(!(cond))
       VAL         [\old(cond)=1, cond=1]
[L29]  RET         __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [sn=4, x=2]
[L24]  COND TRUE   1
[L25]  COND TRUE   x<10
[L26]              sn = sn + (2)
[L28]              x++
       VAL         [sn=6, x=3]
[L29]  CALL        __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [\old(cond)=1]
[L14]  COND FALSE  !(!(cond))
       VAL         [\old(cond)=1, cond=1]
[L29]  RET         __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [sn=6, x=3]
[L24]  COND TRUE   1
[L25]  COND TRUE   x<10
[L26]              sn = sn + (2)
[L28]              x++
       VAL         [sn=8, x=4]
[L29]  CALL        __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [\old(cond)=1]
[L14]  COND FALSE  !(!(cond))
       VAL         [\old(cond)=1, cond=1]
[L29]  RET         __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [sn=8, x=4]
[L24]  COND TRUE   1
[L25]  COND TRUE   x<10
[L26]              sn = sn + (2)
[L28]              x++
       VAL         [sn=10, x=5]
[L29]  CALL        __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [\old(cond)=1]
[L14]  COND FALSE  !(!(cond))
       VAL         [\old(cond)=1, cond=1]
[L29]  RET         __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [sn=10, x=5]
[L24]  COND TRUE   1
[L25]  COND TRUE   x<10
[L26]              sn = sn + (2)
[L28]              x++
       VAL         [sn=12, x=6]
[L29]  CALL        __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [\old(cond)=1]
[L14]  COND FALSE  !(!(cond))
       VAL         [\old(cond)=1, cond=1]
[L29]  RET         __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [sn=12, x=6]
[L24]  COND TRUE   1
[L25]  COND TRUE   x<10
[L26]              sn = sn + (2)
[L28]              x++
       VAL         [sn=14, x=7]
[L29]  CALL        __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [\old(cond)=1]
[L14]  COND FALSE  !(!(cond))
       VAL         [\old(cond)=1, cond=1]
[L29]  RET         __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [sn=14, x=7]
[L24]  COND TRUE   1
[L25]  COND TRUE   x<10
[L26]              sn = sn + (2)
[L28]              x++
       VAL         [sn=16, x=8]
[L29]  CALL        __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [\old(cond)=1]
[L14]  COND FALSE  !(!(cond))
       VAL         [\old(cond)=1, cond=1]
[L29]  RET         __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [sn=16, x=8]
[L24]  COND TRUE   1
[L25]  COND TRUE   x<10
[L26]              sn = sn + (2)
[L28]              x++
       VAL         [sn=18, x=9]
[L29]  CALL        __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [\old(cond)=1]
[L14]  COND FALSE  !(!(cond))
       VAL         [\old(cond)=1, cond=1]
[L29]  RET         __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [sn=18, x=9]
[L24]  COND TRUE   1
[L25]  COND TRUE   x<10
[L26]              sn = sn + (2)
[L28]              x++
       VAL         [sn=20, x=10]
[L29]  CALL        __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [\old(cond)=1]
[L14]  COND FALSE  !(!(cond))
       VAL         [\old(cond)=1, cond=1]
[L29]  RET         __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [sn=20, x=10]
[L24]  COND TRUE   1
[L25]  COND FALSE  !(x<10)
[L28]              x++
       VAL         [sn=20, x=11]
[L29]  CALL        __VERIFIER_assert(sn==x*(2) || sn == 0)
       VAL         [\old(cond)=0]
[L14]  COND TRUE   !(cond)
       VAL         [\old(cond)=0, cond=0]
[L15]              reach_error()
       VAL         [\old(cond)=0, cond=0]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 101.1s, OverallIterations: 4, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 89.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 36 SdHoareTripleChecker+Valid, 10.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 161 SdHoareTripleChecker+Invalid, 10.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 132 mSDsCounter, 43 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 368 IncrementalHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 43 mSolverCounterUnsat, 29 mSDtfsCounter, 368 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 204 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 82.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=3, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 192 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 171 ConstructedInterpolants, 0 QuantifiedInterpolants, 1452 SizeOfPredicates, 5 NumberOfNonLiveVariables, 172 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 151/252 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
[2023-04-02 22:02:05,885 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...