./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/count_up_down-1.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version a31fd051
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/count_up_down-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5879e48447fc7f125bd26345b332bcb57cae00365c3de30b5785162154970826
--- Real Ultimate output ---
This is Ultimate 0.2.2-?-a31fd05
[2023-02-15 10:54:00,760 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-02-15 10:54:00,762 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-02-15 10:54:00,798 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-02-15 10:54:00,801 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-02-15 10:54:00,804 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-02-15 10:54:00,806 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-02-15 10:54:00,809 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-02-15 10:54:00,811 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-02-15 10:54:00,815 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-02-15 10:54:00,816 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-02-15 10:54:00,819 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-02-15 10:54:00,819 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-02-15 10:54:00,822 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-02-15 10:54:00,823 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-02-15 10:54:00,825 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-02-15 10:54:00,826 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-02-15 10:54:00,827 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-02-15 10:54:00,829 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-02-15 10:54:00,834 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-02-15 10:54:00,835 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-02-15 10:54:00,836 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-02-15 10:54:00,837 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-02-15 10:54:00,838 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-02-15 10:54:00,841 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2023-02-15 10:54:00,842 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2023-02-15 10:54:00,842 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-02-15 10:54:00,843 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2023-02-15 10:54:00,844 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2023-02-15 10:54:00,844 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-02-15 10:54:00,845 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-02-15 10:54:00,846 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-02-15 10:54:00,847 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-02-15 10:54:00,848 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-02-15 10:54:00,849 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-02-15 10:54:00,849 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2023-02-15 10:54:00,849 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2023-02-15 10:54:00,850 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2023-02-15 10:54:00,850 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2023-02-15 10:54:00,851 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2023-02-15 10:54:00,852 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-02-15 10:54:00,853 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-02-15 10:54:00,882 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-02-15 10:54:00,883 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-02-15 10:54:00,883 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-02-15 10:54:00,883 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-02-15 10:54:00,884 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-02-15 10:54:00,884 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-02-15 10:54:00,885 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-02-15 10:54:00,885 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2023-02-15 10:54:00,885 INFO  L138        SettingsManager]:  * Use SBE=true
[2023-02-15 10:54:00,885 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-02-15 10:54:00,886 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-02-15 10:54:00,886 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-02-15 10:54:00,886 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-02-15 10:54:00,886 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-02-15 10:54:00,887 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-02-15 10:54:00,887 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-02-15 10:54:00,887 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-02-15 10:54:00,887 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-02-15 10:54:00,887 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-02-15 10:54:00,887 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-02-15 10:54:00,888 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-02-15 10:54:00,888 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-02-15 10:54:00,888 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-02-15 10:54:00,888 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-02-15 10:54:00,888 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-02-15 10:54:00,889 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-02-15 10:54:00,889 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-02-15 10:54:00,889 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-02-15 10:54:00,889 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-02-15 10:54:00,890 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-02-15 10:54:00,890 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-02-15 10:54:00,890 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-02-15 10:54:00,890 INFO  L138        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-02-15 10:54:00,890 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-02-15 10:54:00,891 INFO  L138        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-02-15 10:54:00,891 INFO  L138        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
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.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5879e48447fc7f125bd26345b332bcb57cae00365c3de30b5785162154970826
[2023-02-15 10:54:01,104 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-02-15 10:54:01,124 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-02-15 10:54:01,126 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-02-15 10:54:01,127 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-02-15 10:54:01,128 INFO  L275        PluginConnector]: CDTParser initialized
[2023-02-15 10:54:01,129 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/count_up_down-1.c
[2023-02-15 10:54:02,202 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-02-15 10:54:02,356 INFO  L351              CDTParser]: Found 1 translation units.
[2023-02-15 10:54:02,356 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/count_up_down-1.c
[2023-02-15 10:54:02,360 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f452410c8/fcd37d0e7a7e441ab64d9b908b727528/FLAG4e9a9a029
[2023-02-15 10:54:02,371 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f452410c8/fcd37d0e7a7e441ab64d9b908b727528
[2023-02-15 10:54:02,373 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-02-15 10:54:02,374 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-02-15 10:54:02,375 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-02-15 10:54:02,375 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-02-15 10:54:02,381 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-02-15 10:54:02,381 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:54:02" (1/1) ...
[2023-02-15 10:54:02,382 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f1899f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:54:02, skipping insertion in model container
[2023-02-15 10:54:02,382 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:54:02" (1/1) ...
[2023-02-15 10:54:02,388 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-02-15 10:54:02,397 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-02-15 10:54:02,507 WARN  L237   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/count_up_down-1.c[327,340]
[2023-02-15 10:54:02,516 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2023-02-15 10:54:02,521 INFO  L203         MainTranslator]: Completed pre-run
[2023-02-15 10:54:02,529 WARN  L237   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/count_up_down-1.c[327,340]
[2023-02-15 10:54:02,530 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2023-02-15 10:54:02,539 INFO  L208         MainTranslator]: Completed translation
[2023-02-15 10:54:02,539 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:54:02 WrapperNode
[2023-02-15 10:54:02,539 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-02-15 10:54:02,540 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-02-15 10:54:02,540 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-02-15 10:54:02,540 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2023-02-15 10:54:02,544 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:54:02" (1/1) ...
[2023-02-15 10:54:02,548 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:54:02" (1/1) ...
[2023-02-15 10:54:02,558 INFO  L138                Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 31
[2023-02-15 10:54:02,559 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-02-15 10:54:02,559 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-02-15 10:54:02,559 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-02-15 10:54:02,559 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-02-15 10:54:02,566 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:54:02" (1/1) ...
[2023-02-15 10:54:02,566 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:54:02" (1/1) ...
[2023-02-15 10:54:02,567 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:54:02" (1/1) ...
[2023-02-15 10:54:02,567 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:54:02" (1/1) ...
[2023-02-15 10:54:02,569 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:54:02" (1/1) ...
[2023-02-15 10:54:02,571 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:54:02" (1/1) ...
[2023-02-15 10:54:02,572 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:54:02" (1/1) ...
[2023-02-15 10:54:02,572 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:54:02" (1/1) ...
[2023-02-15 10:54:02,573 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-02-15 10:54:02,574 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-02-15 10:54:02,574 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-02-15 10:54:02,574 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-02-15 10:54:02,575 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:54:02" (1/1) ...
[2023-02-15 10:54:02,580 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-02-15 10:54:02,587 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-15 10:54:02,596 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)
[2023-02-15 10:54:02,598 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
[2023-02-15 10:54:02,627 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-02-15 10:54:02,627 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-02-15 10:54:02,627 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-02-15 10:54:02,627 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-02-15 10:54:02,676 INFO  L235             CfgBuilder]: Building ICFG
[2023-02-15 10:54:02,678 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-02-15 10:54:02,809 INFO  L276             CfgBuilder]: Performing block encoding
[2023-02-15 10:54:02,814 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-02-15 10:54:02,815 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2023-02-15 10:54:02,816 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:54:02 BoogieIcfgContainer
[2023-02-15 10:54:02,816 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-02-15 10:54:02,818 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-02-15 10:54:02,818 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-02-15 10:54:02,821 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-02-15 10:54:02,821 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:54:02" (1/3) ...
[2023-02-15 10:54:02,822 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1f8b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:54:02, skipping insertion in model container
[2023-02-15 10:54:02,825 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:54:02" (2/3) ...
[2023-02-15 10:54:02,825 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1f8b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:54:02, skipping insertion in model container
[2023-02-15 10:54:02,825 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:54:02" (3/3) ...
[2023-02-15 10:54:02,827 INFO  L112   eAbstractionObserver]: Analyzing ICFG count_up_down-1.c
[2023-02-15 10:54:02,842 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-02-15 10:54:02,843 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-02-15 10:54:02,893 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-02-15 10:54:02,899 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=PETRI_NET, 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;@26ecb71e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-02-15 10:54:02,900 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-02-15 10:54:02,903 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-15 10:54:02,911 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2023-02-15 10:54:02,911 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-15 10:54:02,912 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2023-02-15 10:54:02,913 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-15 10:54:02,918 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-15 10:54:02,919 INFO  L85        PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times
[2023-02-15 10:54:02,926 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-15 10:54:02,926 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733940381]
[2023-02-15 10:54:02,927 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-15 10:54:02,927 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-15 10:54:03,051 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-15 10:54:03,391 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-15 10:54:03,391 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-15 10:54:03,392 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733940381]
[2023-02-15 10:54:03,392 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733940381] provided 1 perfect and 0 imperfect interpolant sequences
[2023-02-15 10:54:03,392 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-02-15 10:54:03,393 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-02-15 10:54:03,394 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434896525]
[2023-02-15 10:54:03,395 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-02-15 10:54:03,398 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-02-15 10:54:03,398 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-15 10:54:03,420 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-02-15 10:54:03,421 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-02-15 10:54:03,423 INFO  L87              Difference]: Start difference. First operand  has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-15 10:54:03,497 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-15 10:54:03,497 INFO  L93              Difference]: Finished difference Result 26 states and 30 transitions.
[2023-02-15 10:54:03,499 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-02-15 10:54:03,500 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6
[2023-02-15 10:54:03,500 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-15 10:54:03,506 INFO  L225             Difference]: With dead ends: 26
[2023-02-15 10:54:03,508 INFO  L226             Difference]: Without dead ends: 8
[2023-02-15 10:54:03,510 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2023-02-15 10:54:03,513 INFO  L413           NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-02-15 10:54:03,516 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 25 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-02-15 10:54:03,558 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8 states.
[2023-02-15 10:54:03,569 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8.
[2023-02-15 10:54:03,570 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-15 10:54:03,571 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions.
[2023-02-15 10:54:03,572 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6
[2023-02-15 10:54:03,572 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-15 10:54:03,573 INFO  L495      AbstractCegarLoop]: Abstraction has 8 states and 8 transitions.
[2023-02-15 10:54:03,573 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-15 10:54:03,573 INFO  L276                IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions.
[2023-02-15 10:54:03,574 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2023-02-15 10:54:03,574 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-15 10:54:03,574 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2023-02-15 10:54:03,574 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-02-15 10:54:03,574 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-15 10:54:03,575 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-15 10:54:03,575 INFO  L85        PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times
[2023-02-15 10:54:03,575 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-15 10:54:03,575 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654902603]
[2023-02-15 10:54:03,575 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-15 10:54:03,576 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-15 10:54:03,600 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-15 10:54:03,931 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-15 10:54:03,931 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-15 10:54:03,932 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654902603]
[2023-02-15 10:54:03,933 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654902603] provided 0 perfect and 1 imperfect interpolant sequences
[2023-02-15 10:54:03,933 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475485529]
[2023-02-15 10:54:03,933 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-15 10:54:03,934 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-15 10:54:03,934 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-15 10:54:03,941 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)
[2023-02-15 10:54:03,961 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-02-15 10:54:03,995 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-15 10:54:03,997 INFO  L263         TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 16 conjunts are in the unsatisfiable core
[2023-02-15 10:54:04,002 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-15 10:54:04,150 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-15 10:54:04,151 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2023-02-15 10:54:04,264 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-15 10:54:04,268 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475485529] provided 0 perfect and 2 imperfect interpolant sequences
[2023-02-15 10:54:04,268 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-02-15 10:54:04,268 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11
[2023-02-15 10:54:04,269 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441212641]
[2023-02-15 10:54:04,270 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-02-15 10:54:04,271 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-02-15 10:54:04,271 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-15 10:54:04,271 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-02-15 10:54:04,272 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110
[2023-02-15 10:54:04,272 INFO  L87              Difference]: Start difference. First operand 8 states and 8 transitions. Second operand  has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-15 10:54:04,506 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-15 10:54:04,506 INFO  L93              Difference]: Finished difference Result 17 states and 19 transitions.
[2023-02-15 10:54:04,507 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2023-02-15 10:54:04,507 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7
[2023-02-15 10:54:04,507 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-15 10:54:04,507 INFO  L225             Difference]: With dead ends: 17
[2023-02-15 10:54:04,507 INFO  L226             Difference]: Without dead ends: 11
[2023-02-15 10:54:04,508 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240
[2023-02-15 10:54:04,509 INFO  L413           NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-02-15 10:54:04,509 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 17 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-02-15 10:54:04,510 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2023-02-15 10:54:04,516 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11.
[2023-02-15 10:54:04,517 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-15 10:54:04,517 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions.
[2023-02-15 10:54:04,517 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7
[2023-02-15 10:54:04,517 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-15 10:54:04,518 INFO  L495      AbstractCegarLoop]: Abstraction has 11 states and 11 transitions.
[2023-02-15 10:54:04,518 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-15 10:54:04,518 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions.
[2023-02-15 10:54:04,518 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2023-02-15 10:54:04,518 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-15 10:54:04,518 INFO  L195           NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1]
[2023-02-15 10:54:04,527 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-02-15 10:54:04,719 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
[2023-02-15 10:54:04,719 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-15 10:54:04,720 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-15 10:54:04,720 INFO  L85        PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times
[2023-02-15 10:54:04,720 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-15 10:54:04,720 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199824169]
[2023-02-15 10:54:04,720 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-15 10:54:04,720 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-15 10:54:04,755 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-15 10:54:05,235 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-15 10:54:05,236 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-15 10:54:05,236 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199824169]
[2023-02-15 10:54:05,236 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199824169] provided 0 perfect and 1 imperfect interpolant sequences
[2023-02-15 10:54:05,236 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265399247]
[2023-02-15 10:54:05,236 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2023-02-15 10:54:05,236 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-15 10:54:05,237 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-15 10:54:05,238 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)
[2023-02-15 10:54:05,258 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-02-15 10:54:05,293 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2023-02-15 10:54:05,293 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-02-15 10:54:05,306 INFO  L263         TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 27 conjunts are in the unsatisfiable core
[2023-02-15 10:54:05,308 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-15 10:54:05,457 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-15 10:54:05,457 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2023-02-15 10:54:05,723 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-15 10:54:05,723 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265399247] provided 0 perfect and 2 imperfect interpolant sequences
[2023-02-15 10:54:05,723 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-02-15 10:54:05,723 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21
[2023-02-15 10:54:05,724 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973182066]
[2023-02-15 10:54:05,724 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-02-15 10:54:05,724 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2023-02-15 10:54:05,724 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-15 10:54:05,725 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2023-02-15 10:54:05,726 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420
[2023-02-15 10:54:05,726 INFO  L87              Difference]: Start difference. First operand 11 states and 11 transitions. Second operand  has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-15 10:54:07,718 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-15 10:54:07,718 INFO  L93              Difference]: Finished difference Result 25 states and 30 transitions.
[2023-02-15 10:54:07,719 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2023-02-15 10:54:07,719 INFO  L78                 Accepts]: Start accepts. Automaton has  has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10
[2023-02-15 10:54:07,719 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-15 10:54:07,721 INFO  L225             Difference]: With dead ends: 25
[2023-02-15 10:54:07,721 INFO  L226             Difference]: Without dead ends: 17
[2023-02-15 10:54:07,722 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056
[2023-02-15 10:54:07,724 INFO  L413           NwaCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-02-15 10:54:07,724 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 33 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-02-15 10:54:07,725 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2023-02-15 10:54:07,732 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2023-02-15 10:54:07,732 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-15 10:54:07,733 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions.
[2023-02-15 10:54:07,733 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10
[2023-02-15 10:54:07,733 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-15 10:54:07,733 INFO  L495      AbstractCegarLoop]: Abstraction has 17 states and 17 transitions.
[2023-02-15 10:54:07,734 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-15 10:54:07,734 INFO  L276                IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions.
[2023-02-15 10:54:07,734 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2023-02-15 10:54:07,734 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-15 10:54:07,735 INFO  L195           NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1]
[2023-02-15 10:54:07,741 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-02-15 10:54:07,941 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
[2023-02-15 10:54:07,941 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-15 10:54:07,942 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-15 10:54:07,942 INFO  L85        PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 3 times
[2023-02-15 10:54:07,942 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-15 10:54:07,942 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210655451]
[2023-02-15 10:54:07,942 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-15 10:54:07,943 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-15 10:54:07,981 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-15 10:54:08,805 INFO  L134       CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-15 10:54:08,806 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-15 10:54:08,806 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210655451]
[2023-02-15 10:54:08,806 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210655451] provided 0 perfect and 1 imperfect interpolant sequences
[2023-02-15 10:54:08,806 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048293295]
[2023-02-15 10:54:08,806 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2023-02-15 10:54:08,806 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-15 10:54:08,807 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-15 10:54:08,808 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-02-15 10:54:08,833 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-02-15 10:54:09,091 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2023-02-15 10:54:09,091 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-02-15 10:54:09,094 WARN  L261         TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 55 conjunts are in the unsatisfiable core
[2023-02-15 10:54:09,096 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-15 10:54:47,487 INFO  L134       CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-15 10:54:47,487 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2023-02-15 10:54:49,570 INFO  L134       CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-15 10:54:49,570 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048293295] provided 0 perfect and 2 imperfect interpolant sequences
[2023-02-15 10:54:49,571 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-02-15 10:54:49,571 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37
[2023-02-15 10:54:49,571 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507629443]
[2023-02-15 10:54:49,571 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-02-15 10:54:49,572 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 37 states
[2023-02-15 10:54:49,572 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-15 10:54:49,573 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants.
[2023-02-15 10:54:49,573 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1029, Unknown=0, NotChecked=0, Total=1332
[2023-02-15 10:54:49,574 INFO  L87              Difference]: Start difference. First operand 17 states and 17 transitions. Second operand  has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-15 10:57:02,245 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-15 10:57:02,245 INFO  L93              Difference]: Finished difference Result 37 states and 48 transitions.
[2023-02-15 10:57:02,248 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. 
[2023-02-15 10:57:02,248 INFO  L78                 Accepts]: Start accepts. Automaton has  has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16
[2023-02-15 10:57:02,248 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-15 10:57:02,249 INFO  L225             Difference]: With dead ends: 37
[2023-02-15 10:57:02,249 INFO  L226             Difference]: Without dead ends: 29
[2023-02-15 10:57:02,250 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 137.2s TimeCoverageRelationStatistics Valid=839, Invalid=2120, Unknown=11, NotChecked=0, Total=2970
[2023-02-15 10:57:02,250 INFO  L413           NwaCegarLoop]: 4 mSDtfsCounter, 132 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2023-02-15 10:57:02,251 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 37 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2023-02-15 10:57:02,251 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2023-02-15 10:57:02,265 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29.
[2023-02-15 10:57:02,267 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-15 10:57:02,268 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions.
[2023-02-15 10:57:02,268 INFO  L78                 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 16
[2023-02-15 10:57:02,269 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-15 10:57:02,269 INFO  L495      AbstractCegarLoop]: Abstraction has 29 states and 29 transitions.
[2023-02-15 10:57:02,271 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-15 10:57:02,272 INFO  L276                IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions.
[2023-02-15 10:57:02,274 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2023-02-15 10:57:02,274 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-15 10:57:02,274 INFO  L195           NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1]
[2023-02-15 10:57:02,280 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-02-15 10:57:02,480 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-15 10:57:02,481 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-15 10:57:02,481 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-15 10:57:02,481 INFO  L85        PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 4 times
[2023-02-15 10:57:02,481 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-15 10:57:02,481 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762258293]
[2023-02-15 10:57:02,481 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-15 10:57:02,482 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-15 10:57:02,569 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-15 10:57:04,447 INFO  L134       CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-15 10:57:04,448 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-15 10:57:04,448 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762258293]
[2023-02-15 10:57:04,448 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762258293] provided 0 perfect and 1 imperfect interpolant sequences
[2023-02-15 10:57:04,448 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744326507]
[2023-02-15 10:57:04,448 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2023-02-15 10:57:04,449 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-15 10:57:04,449 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-15 10:57:04,450 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-02-15 10:57:04,451 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-02-15 10:57:06,904 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2023-02-15 10:57:06,904 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-02-15 10:57:06,906 WARN  L261         TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 105 conjunts are in the unsatisfiable core
[2023-02-15 10:57:06,909 INFO  L286         TraceCheckSpWp]: Computing forward predicates...