./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 7e1ff0e6
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/nla-digbench-scaling/divbin2_valuebound1.i -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 09575df3d22e9082519fef8b3f639469f79418a93deb54dd64ac9991de61e42a
--- Real Ultimate output ---
This is Ultimate 0.2.2-?-7e1ff0e
[2023-02-14 23:42:44,258 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-02-14 23:42:44,260 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-02-14 23:42:44,304 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-02-14 23:42:44,304 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-02-14 23:42:44,308 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-02-14 23:42:44,310 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-02-14 23:42:44,313 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-02-14 23:42:44,316 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-02-14 23:42:44,318 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-02-14 23:42:44,320 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-02-14 23:42:44,322 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-02-14 23:42:44,322 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-02-14 23:42:44,327 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-02-14 23:42:44,329 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-02-14 23:42:44,330 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-02-14 23:42:44,331 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-02-14 23:42:44,332 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-02-14 23:42:44,334 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-02-14 23:42:44,335 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-02-14 23:42:44,339 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-02-14 23:42:44,340 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-02-14 23:42:44,341 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-02-14 23:42:44,342 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-02-14 23:42:44,347 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2023-02-14 23:42:44,348 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2023-02-14 23:42:44,348 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-02-14 23:42:44,350 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2023-02-14 23:42:44,350 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2023-02-14 23:42:44,351 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-02-14 23:42:44,351 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-02-14 23:42:44,352 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-02-14 23:42:44,353 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-02-14 23:42:44,354 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-02-14 23:42:44,355 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-02-14 23:42:44,355 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2023-02-14 23:42:44,355 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2023-02-14 23:42:44,355 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2023-02-14 23:42:44,356 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2023-02-14 23:42:44,357 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2023-02-14 23:42:44,358 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-02-14 23:42:44,359 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-02-14 23:42:44,382 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-02-14 23:42:44,382 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-02-14 23:42:44,383 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-02-14 23:42:44,383 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-02-14 23:42:44,383 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-02-14 23:42:44,384 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-02-14 23:42:44,384 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-02-14 23:42:44,384 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2023-02-14 23:42:44,384 INFO  L138        SettingsManager]:  * Use SBE=true
[2023-02-14 23:42:44,385 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-02-14 23:42:44,385 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-02-14 23:42:44,386 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-02-14 23:42:44,386 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-02-14 23:42:44,386 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-02-14 23:42:44,386 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-02-14 23:42:44,386 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-02-14 23:42:44,387 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-02-14 23:42:44,387 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-02-14 23:42:44,387 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-02-14 23:42:44,387 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-02-14 23:42:44,387 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-02-14 23:42:44,387 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-02-14 23:42:44,388 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-02-14 23:42:44,388 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-02-14 23:42:44,388 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-02-14 23:42:44,388 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-02-14 23:42:44,388 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-02-14 23:42:44,389 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-02-14 23:42:44,389 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-02-14 23:42:44,389 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-02-14 23:42:44,389 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-02-14 23:42:44,389 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-02-14 23:42:44,390 INFO  L138        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-02-14 23:42:44,390 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-02-14 23:42:44,390 INFO  L138        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-02-14 23:42:44,390 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 -> 09575df3d22e9082519fef8b3f639469f79418a93deb54dd64ac9991de61e42a
[2023-02-14 23:42:44,661 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-02-14 23:42:44,680 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-02-14 23:42:44,682 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-02-14 23:42:44,683 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-02-14 23:42:44,684 INFO  L275        PluginConnector]: CDTParser initialized
[2023-02-14 23:42:44,685 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i
[2023-02-14 23:42:45,801 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-02-14 23:42:45,939 INFO  L351              CDTParser]: Found 1 translation units.
[2023-02-14 23:42:45,939 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i
[2023-02-14 23:42:45,944 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e9249e1/1f1cedc8513b4ad9bae9135922a13d16/FLAG10546ff0b
[2023-02-14 23:42:45,958 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e9249e1/1f1cedc8513b4ad9bae9135922a13d16
[2023-02-14 23:42:45,959 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-02-14 23:42:45,960 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-02-14 23:42:45,961 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-02-14 23:42:45,962 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-02-14 23:42:45,964 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-02-14 23:42:45,965 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:42:45" (1/1) ...
[2023-02-14 23:42:45,966 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d01d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:42:45, skipping insertion in model container
[2023-02-14 23:42:45,966 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:42:45" (1/1) ...
[2023-02-14 23:42:45,971 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-02-14 23:42:45,983 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-02-14 23:42:46,133 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/nla-digbench-scaling/divbin2_valuebound1.i[951,964]
[2023-02-14 23:42:46,146 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2023-02-14 23:42:46,154 INFO  L203         MainTranslator]: Completed pre-run
[2023-02-14 23:42:46,164 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/nla-digbench-scaling/divbin2_valuebound1.i[951,964]
[2023-02-14 23:42:46,168 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2023-02-14 23:42:46,179 INFO  L208         MainTranslator]: Completed translation
[2023-02-14 23:42:46,179 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:42:46 WrapperNode
[2023-02-14 23:42:46,179 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-02-14 23:42:46,180 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-02-14 23:42:46,180 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-02-14 23:42:46,181 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2023-02-14 23:42:46,186 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:42:46" (1/1) ...
[2023-02-14 23:42:46,190 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:42:46" (1/1) ...
[2023-02-14 23:42:46,203 INFO  L138                Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46
[2023-02-14 23:42:46,203 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-02-14 23:42:46,204 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-02-14 23:42:46,204 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-02-14 23:42:46,204 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-02-14 23:42:46,212 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:42:46" (1/1) ...
[2023-02-14 23:42:46,212 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:42:46" (1/1) ...
[2023-02-14 23:42:46,213 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:42:46" (1/1) ...
[2023-02-14 23:42:46,213 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:42:46" (1/1) ...
[2023-02-14 23:42:46,216 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:42:46" (1/1) ...
[2023-02-14 23:42:46,218 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:42:46" (1/1) ...
[2023-02-14 23:42:46,219 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:42:46" (1/1) ...
[2023-02-14 23:42:46,220 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:42:46" (1/1) ...
[2023-02-14 23:42:46,221 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-02-14 23:42:46,222 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-02-14 23:42:46,222 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-02-14 23:42:46,222 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-02-14 23:42:46,223 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:42:46" (1/1) ...
[2023-02-14 23:42:46,231 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-02-14 23:42:46,239 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:42:46,250 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)
[2023-02-14 23:42:46,267 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
[2023-02-14 23:42:46,284 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-02-14 23:42:46,285 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-02-14 23:42:46,285 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-02-14 23:42:46,285 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-02-14 23:42:46,285 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2023-02-14 23:42:46,285 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2023-02-14 23:42:46,337 INFO  L235             CfgBuilder]: Building ICFG
[2023-02-14 23:42:46,339 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-02-14 23:42:46,447 INFO  L276             CfgBuilder]: Performing block encoding
[2023-02-14 23:42:46,452 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-02-14 23:42:46,452 INFO  L300             CfgBuilder]: Removed 2 assume(true) statements.
[2023-02-14 23:42:46,454 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:42:46 BoogieIcfgContainer
[2023-02-14 23:42:46,454 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-02-14 23:42:46,456 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-02-14 23:42:46,456 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-02-14 23:42:46,458 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-02-14 23:42:46,459 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:42:45" (1/3) ...
[2023-02-14 23:42:46,459 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7f9372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:42:46, skipping insertion in model container
[2023-02-14 23:42:46,459 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:42:46" (2/3) ...
[2023-02-14 23:42:46,460 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7f9372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:42:46, skipping insertion in model container
[2023-02-14 23:42:46,460 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:42:46" (3/3) ...
[2023-02-14 23:42:46,461 INFO  L112   eAbstractionObserver]: Analyzing ICFG divbin2_valuebound1.i
[2023-02-14 23:42:46,475 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-02-14 23:42:46,476 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-02-14 23:42:46,519 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-02-14 23:42:46,527 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;@7bc1378, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-02-14 23:42:46,527 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-02-14 23:42:46,531 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-02-14 23:42:46,535 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2023-02-14 23:42:46,535 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:42:46,535 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:42:46,536 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:42:46,539 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:42:46,540 INFO  L85        PathProgramCache]: Analyzing trace with hash -1105477780, now seen corresponding path program 1 times
[2023-02-14 23:42:46,547 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:42:46,547 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005420547]
[2023-02-14 23:42:46,547 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:42:46,548 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:42:46,616 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:42:46,634 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:42:46,635 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005420547]
[2023-02-14 23:42:46,635 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic
[2023-02-14 23:42:46,635 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198426496]
[2023-02-14 23:42:46,636 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:42:46,636 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:42:46,636 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:42:46,644 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)
[2023-02-14 23:42:46,647 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-02-14 23:42:46,741 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:42:46,742 INFO  L263         TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core
[2023-02-14 23:42:46,746 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:42:46,763 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-14 23:42:46,763 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-02-14 23:42:46,764 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198426496] provided 1 perfect and 0 imperfect interpolant sequences
[2023-02-14 23:42:46,764 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-02-14 23:42:46,764 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-02-14 23:42:46,789 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648015461]
[2023-02-14 23:42:46,790 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-02-14 23:42:46,793 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2023-02-14 23:42:46,794 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:42:46,814 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2023-02-14 23:42:46,815 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-02-14 23:42:46,816 INFO  L87              Difference]: Start difference. First operand  has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand  has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-14 23:42:46,843 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:42:46,844 INFO  L93              Difference]: Finished difference Result 39 states and 58 transitions.
[2023-02-14 23:42:46,857 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2023-02-14 23:42:46,864 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10
[2023-02-14 23:42:46,864 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:42:46,869 INFO  L225             Difference]: With dead ends: 39
[2023-02-14 23:42:46,870 INFO  L226             Difference]: Without dead ends: 17
[2023-02-14 23:42:46,873 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-02-14 23:42:46,880 INFO  L413           NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-02-14 23:42:46,881 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-02-14 23:42:46,899 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2023-02-14 23:42:46,910 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2023-02-14 23:42:46,911 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-02-14 23:42:46,911 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions.
[2023-02-14 23:42:46,912 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10
[2023-02-14 23:42:46,913 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:42:46,913 INFO  L495      AbstractCegarLoop]: Abstraction has 17 states and 20 transitions.
[2023-02-14 23:42:46,913 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-14 23:42:46,913 INFO  L276                IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions.
[2023-02-14 23:42:46,914 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-02-14 23:42:46,914 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:42:46,914 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:42:46,920 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-02-14 23:42:47,118 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0
[2023-02-14 23:42:47,119 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:42:47,120 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:42:47,120 INFO  L85        PathProgramCache]: Analyzing trace with hash -2095969935, now seen corresponding path program 1 times
[2023-02-14 23:42:47,120 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:42:47,120 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628790036]
[2023-02-14 23:42:47,121 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:42:47,121 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:42:47,136 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-02-14 23:42:47,137 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595730370]
[2023-02-14 23:42:47,137 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:42:47,137 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:42:47,137 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:42:47,138 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)
[2023-02-14 23:42:47,140 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-02-14 23:42:47,186 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:42:47,187 INFO  L263         TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core
[2023-02-14 23:42:47,190 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:42:47,386 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-14 23:42:47,387 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-02-14 23:42:47,387 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:42:47,387 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628790036]
[2023-02-14 23:42:47,387 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-02-14 23:42:47,388 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595730370]
[2023-02-14 23:42:47,388 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595730370] provided 1 perfect and 0 imperfect interpolant sequences
[2023-02-14 23:42:47,388 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-02-14 23:42:47,388 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-02-14 23:42:47,388 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068217560]
[2023-02-14 23:42:47,389 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-02-14 23:42:47,389 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-02-14 23:42:47,390 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:42:47,390 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-02-14 23:42:47,391 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2023-02-14 23:42:47,391 INFO  L87              Difference]: Start difference. First operand 17 states and 20 transitions. Second operand  has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-14 23:42:47,530 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:42:47,530 INFO  L93              Difference]: Finished difference Result 29 states and 34 transitions.
[2023-02-14 23:42:47,531 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-02-14 23:42:47,531 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11
[2023-02-14 23:42:47,531 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:42:47,532 INFO  L225             Difference]: With dead ends: 29
[2023-02-14 23:42:47,532 INFO  L226             Difference]: Without dead ends: 26
[2023-02-14 23:42:47,533 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132
[2023-02-14 23:42:47,534 INFO  L413           NwaCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-02-14 23:42:47,534 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 44 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-02-14 23:42:47,535 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2023-02-14 23:42:47,541 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2023-02-14 23:42:47,541 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 26 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-02-14 23:42:47,542 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions.
[2023-02-14 23:42:47,542 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 11
[2023-02-14 23:42:47,542 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:42:47,543 INFO  L495      AbstractCegarLoop]: Abstraction has 26 states and 30 transitions.
[2023-02-14 23:42:47,543 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-14 23:42:47,543 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions.
[2023-02-14 23:42:47,543 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2023-02-14 23:42:47,544 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:42:47,544 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:42:47,552 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-02-14 23:42:47,751 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,SelfDestructingSolverStorable1
[2023-02-14 23:42:47,752 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:42:47,753 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:42:47,753 INFO  L85        PathProgramCache]: Analyzing trace with hash 975547596, now seen corresponding path program 1 times
[2023-02-14 23:42:47,753 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:42:47,754 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235593987]
[2023-02-14 23:42:47,754 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:42:47,754 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:42:47,768 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-02-14 23:42:47,769 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131783458]
[2023-02-14 23:42:47,769 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:42:47,769 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:42:47,769 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:42:47,771 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)
[2023-02-14 23:42:47,789 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-02-14 23:42:47,831 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:42:47,833 INFO  L263         TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 20 conjunts are in the unsatisfiable core
[2023-02-14 23:42:47,835 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:42:48,036 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-14 23:42:48,036 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2023-02-14 23:42:48,211 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-14 23:42:48,212 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:42:48,212 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235593987]
[2023-02-14 23:42:48,212 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-02-14 23:42:48,212 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131783458]
[2023-02-14 23:42:48,213 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [131783458] provided 1 perfect and 1 imperfect interpolant sequences
[2023-02-14 23:42:48,213 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-02-14 23:42:48,213 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-02-14 23:42:48,213 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786712409]
[2023-02-14 23:42:48,213 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-02-14 23:42:48,213 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-02-14 23:42:48,214 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:42:48,214 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-02-14 23:42:48,215 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132
[2023-02-14 23:42:48,216 INFO  L87              Difference]: Start difference. First operand 26 states and 30 transitions. Second operand  has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-14 23:42:50,250 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1]
[2023-02-14 23:42:51,419 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1]
[2023-02-14 23:42:53,489 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1]
[2023-02-14 23:42:55,497 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1]
[2023-02-14 23:42:57,777 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1]
[2023-02-14 23:42:59,788 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1]
[2023-02-14 23:42:59,955 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:42:59,955 INFO  L93              Difference]: Finished difference Result 40 states and 47 transitions.
[2023-02-14 23:42:59,955 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-02-14 23:42:59,956 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13
[2023-02-14 23:42:59,956 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:42:59,957 INFO  L225             Difference]: With dead ends: 40
[2023-02-14 23:42:59,957 INFO  L226             Difference]: Without dead ends: 38
[2023-02-14 23:42:59,957 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156
[2023-02-14 23:42:59,958 INFO  L413           NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time
[2023-02-14 23:42:59,959 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 53 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 11.7s Time]
[2023-02-14 23:42:59,959 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2023-02-14 23:42:59,969 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32.
[2023-02-14 23:42:59,971 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-02-14 23:42:59,973 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions.
[2023-02-14 23:42:59,973 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 13
[2023-02-14 23:42:59,973 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:42:59,974 INFO  L495      AbstractCegarLoop]: Abstraction has 32 states and 36 transitions.
[2023-02-14 23:42:59,974 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-02-14 23:42:59,974 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions.
[2023-02-14 23:42:59,975 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2023-02-14 23:42:59,975 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:42:59,975 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:42:59,981 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-02-14 23:43:00,180 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:43:00,181 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:43:00,181 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:43:00,181 INFO  L85        PathProgramCache]: Analyzing trace with hash -1791376988, now seen corresponding path program 1 times
[2023-02-14 23:43:00,181 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:43:00,181 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447503044]
[2023-02-14 23:43:00,181 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:43:00,182 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:43:00,191 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-02-14 23:43:00,191 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895112147]
[2023-02-14 23:43:00,192 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:43:00,192 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:43:00,192 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:43:00,193 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)
[2023-02-14 23:43:00,197 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-02-14 23:43:00,224 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:43:00,226 INFO  L263         TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core
[2023-02-14 23:43:00,227 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:43:00,246 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-14 23:43:00,247 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-02-14 23:43:00,247 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:43:00,247 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447503044]
[2023-02-14 23:43:00,247 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-02-14 23:43:00,248 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895112147]
[2023-02-14 23:43:00,248 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895112147] provided 1 perfect and 0 imperfect interpolant sequences
[2023-02-14 23:43:00,248 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-02-14 23:43:00,248 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-02-14 23:43:00,248 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742385070]
[2023-02-14 23:43:00,248 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-02-14 23:43:00,249 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-02-14 23:43:00,249 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:43:00,250 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-02-14 23:43:00,250 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-02-14 23:43:00,250 INFO  L87              Difference]: Start difference. First operand 32 states and 36 transitions. Second operand  has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-02-14 23:43:00,276 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:43:00,278 INFO  L93              Difference]: Finished difference Result 43 states and 49 transitions.
[2023-02-14 23:43:00,279 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-02-14 23:43:00,279 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19
[2023-02-14 23:43:00,280 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:43:00,282 INFO  L225             Difference]: With dead ends: 43
[2023-02-14 23:43:00,282 INFO  L226             Difference]: Without dead ends: 25
[2023-02-14 23:43:00,283 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-02-14 23:43:00,285 INFO  L413           NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-02-14 23:43:00,286 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-02-14 23:43:00,292 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2023-02-14 23:43:00,299 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2023-02-14 23:43:00,299 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2023-02-14 23:43:00,300 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions.
[2023-02-14 23:43:00,300 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19
[2023-02-14 23:43:00,300 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:43:00,300 INFO  L495      AbstractCegarLoop]: Abstraction has 25 states and 28 transitions.
[2023-02-14 23:43:00,301 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-02-14 23:43:00,301 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions.
[2023-02-14 23:43:00,301 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2023-02-14 23:43:00,301 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:43:00,302 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:43:00,312 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-02-14 23:43:00,508 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:43:00,508 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:43:00,509 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:43:00,509 INFO  L85        PathProgramCache]: Analyzing trace with hash -1508058588, now seen corresponding path program 1 times
[2023-02-14 23:43:00,509 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:43:00,509 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420741095]
[2023-02-14 23:43:00,509 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:43:00,509 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:43:00,516 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-02-14 23:43:00,516 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134095773]
[2023-02-14 23:43:00,516 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:43:00,517 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:43:00,517 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:43:00,518 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-02-14 23:43:00,544 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-02-14 23:43:00,561 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:43:00,562 INFO  L263         TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core
[2023-02-14 23:43:00,566 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:43:00,619 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-02-14 23:43:00,619 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2023-02-14 23:43:00,809 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-02-14 23:43:00,810 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:43:00,810 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420741095]
[2023-02-14 23:43:00,810 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-02-14 23:43:00,811 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134095773]
[2023-02-14 23:43:00,811 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134095773] provided 0 perfect and 2 imperfect interpolant sequences
[2023-02-14 23:43:00,811 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-02-14 23:43:00,811 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9
[2023-02-14 23:43:00,812 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392958288]
[2023-02-14 23:43:00,812 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-02-14 23:43:00,812 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2023-02-14 23:43:00,812 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:43:00,813 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2023-02-14 23:43:00,814 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2023-02-14 23:43:00,814 INFO  L87              Difference]: Start difference. First operand 25 states and 28 transitions. Second operand  has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-02-14 23:43:01,343 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:43:01,343 INFO  L93              Difference]: Finished difference Result 31 states and 33 transitions.
[2023-02-14 23:43:01,344 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-02-14 23:43:01,344 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 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 19
[2023-02-14 23:43:01,344 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:43:01,345 INFO  L225             Difference]: With dead ends: 31
[2023-02-14 23:43:01,345 INFO  L226             Difference]: Without dead ends: 24
[2023-02-14 23:43:01,345 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110
[2023-02-14 23:43:01,346 INFO  L413           NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-02-14 23:43:01,346 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-02-14 23:43:01,346 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2023-02-14 23:43:01,351 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24.
[2023-02-14 23:43:01,351 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2023-02-14 23:43:01,352 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions.
[2023-02-14 23:43:01,352 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19
[2023-02-14 23:43:01,352 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:43:01,352 INFO  L495      AbstractCegarLoop]: Abstraction has 24 states and 26 transitions.
[2023-02-14 23:43:01,352 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-02-14 23:43:01,352 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions.
[2023-02-14 23:43:01,353 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2023-02-14 23:43:01,353 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:43:01,353 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:43:01,364 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-02-14 23:43:01,561 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:43:01,561 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:43:01,562 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:43:01,562 INFO  L85        PathProgramCache]: Analyzing trace with hash -800204289, now seen corresponding path program 1 times
[2023-02-14 23:43:01,562 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:43:01,562 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086318381]
[2023-02-14 23:43:01,562 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:43:01,562 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:43:01,571 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-02-14 23:43:01,572 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050913096]
[2023-02-14 23:43:01,572 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:43:01,572 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:43:01,572 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:43:01,573 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-02-14 23:43:01,604 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-02-14 23:43:01,631 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:43:01,632 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 30 conjunts are in the unsatisfiable core
[2023-02-14 23:43:01,634 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:43:02,237 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-02-14 23:43:02,237 INFO  L328         TraceCheckSpWp]: Computing backward predicates...