./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard-ll.c --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/hard-ll.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 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6
--- Real Ultimate output ---
This is Ultimate 0.2.2-?-7e1ff0e
[2023-02-14 23:29:12,432 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-02-14 23:29:12,434 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-02-14 23:29:12,463 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-02-14 23:29:12,464 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-02-14 23:29:12,467 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-02-14 23:29:12,468 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-02-14 23:29:12,469 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-02-14 23:29:12,471 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-02-14 23:29:12,474 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-02-14 23:29:12,475 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-02-14 23:29:12,477 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-02-14 23:29:12,477 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-02-14 23:29:12,478 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-02-14 23:29:12,479 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-02-14 23:29:12,480 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-02-14 23:29:12,481 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-02-14 23:29:12,482 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-02-14 23:29:12,483 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-02-14 23:29:12,486 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-02-14 23:29:12,487 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-02-14 23:29:12,488 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-02-14 23:29:12,489 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-02-14 23:29:12,489 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-02-14 23:29:12,499 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2023-02-14 23:29:12,499 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2023-02-14 23:29:12,499 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-02-14 23:29:12,500 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2023-02-14 23:29:12,501 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2023-02-14 23:29:12,501 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-02-14 23:29:12,501 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-02-14 23:29:12,502 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-02-14 23:29:12,503 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-02-14 23:29:12,503 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-02-14 23:29:12,505 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-02-14 23:29:12,505 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2023-02-14 23:29:12,505 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2023-02-14 23:29:12,505 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2023-02-14 23:29:12,506 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2023-02-14 23:29:12,506 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2023-02-14 23:29:12,507 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-02-14 23:29:12,508 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-02-14 23:29:12,534 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-02-14 23:29:12,534 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-02-14 23:29:12,535 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-02-14 23:29:12,535 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-02-14 23:29:12,535 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-02-14 23:29:12,536 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-02-14 23:29:12,536 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-02-14 23:29:12,536 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2023-02-14 23:29:12,536 INFO  L138        SettingsManager]:  * Use SBE=true
[2023-02-14 23:29:12,536 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-02-14 23:29:12,537 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-02-14 23:29:12,537 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-02-14 23:29:12,537 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-02-14 23:29:12,537 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-02-14 23:29:12,538 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-02-14 23:29:12,538 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-02-14 23:29:12,538 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-02-14 23:29:12,538 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-02-14 23:29:12,538 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-02-14 23:29:12,538 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-02-14 23:29:12,538 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-02-14 23:29:12,539 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-02-14 23:29:12,539 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-02-14 23:29:12,539 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-02-14 23:29:12,539 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-02-14 23:29:12,539 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-02-14 23:29:12,539 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-02-14 23:29:12,540 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-02-14 23:29:12,540 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-02-14 23:29:12,540 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-02-14 23:29:12,540 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-02-14 23:29:12,540 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-02-14 23:29:12,541 INFO  L138        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-02-14 23:29:12,541 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-02-14 23:29:12,541 INFO  L138        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-02-14 23:29:12,541 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 -> 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6
[2023-02-14 23:29:12,717 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-02-14 23:29:12,735 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-02-14 23:29:12,737 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-02-14 23:29:12,737 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-02-14 23:29:12,738 INFO  L275        PluginConnector]: CDTParser initialized
[2023-02-14 23:29:12,738 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard-ll.c
[2023-02-14 23:29:13,609 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-02-14 23:29:13,765 INFO  L351              CDTParser]: Found 1 translation units.
[2023-02-14 23:29:13,766 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-ll.c
[2023-02-14 23:29:13,770 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7716be323/602bb1ca1c8f4856990e43e3a822b08a/FLAG391f48066
[2023-02-14 23:29:13,779 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7716be323/602bb1ca1c8f4856990e43e3a822b08a
[2023-02-14 23:29:13,781 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-02-14 23:29:13,782 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-02-14 23:29:13,783 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-02-14 23:29:13,783 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-02-14 23:29:13,785 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-02-14 23:29:13,785 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:29:13" (1/1) ...
[2023-02-14 23:29:13,786 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a57be9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:29:13, skipping insertion in model container
[2023-02-14 23:29:13,786 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:29:13" (1/1) ...
[2023-02-14 23:29:13,790 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-02-14 23:29:13,799 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-02-14 23:29:13,891 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/hard-ll.c[538,551]
[2023-02-14 23:29:13,907 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2023-02-14 23:29:13,914 INFO  L203         MainTranslator]: Completed pre-run
[2023-02-14 23:29:13,921 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/hard-ll.c[538,551]
[2023-02-14 23:29:13,924 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2023-02-14 23:29:13,934 INFO  L208         MainTranslator]: Completed translation
[2023-02-14 23:29:13,934 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:29:13 WrapperNode
[2023-02-14 23:29:13,934 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-02-14 23:29:13,935 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-02-14 23:29:13,935 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-02-14 23:29:13,935 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2023-02-14 23:29:13,939 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:29:13" (1/1) ...
[2023-02-14 23:29:13,943 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:29:13" (1/1) ...
[2023-02-14 23:29:13,952 INFO  L138                Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56
[2023-02-14 23:29:13,953 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-02-14 23:29:13,953 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-02-14 23:29:13,953 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-02-14 23:29:13,953 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-02-14 23:29:13,959 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:29:13" (1/1) ...
[2023-02-14 23:29:13,959 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:29:13" (1/1) ...
[2023-02-14 23:29:13,960 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:29:13" (1/1) ...
[2023-02-14 23:29:13,960 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:29:13" (1/1) ...
[2023-02-14 23:29:13,962 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:29:13" (1/1) ...
[2023-02-14 23:29:13,964 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:29:13" (1/1) ...
[2023-02-14 23:29:13,973 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:29:13" (1/1) ...
[2023-02-14 23:29:13,974 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:29:13" (1/1) ...
[2023-02-14 23:29:13,978 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-02-14 23:29:13,979 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-02-14 23:29:13,980 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-02-14 23:29:13,980 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-02-14 23:29:13,980 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:29:13" (1/1) ...
[2023-02-14 23:29:13,984 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-02-14 23:29:13,992 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:29:14,011 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 23:29:14,015 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 23:29:14,040 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-02-14 23:29:14,040 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-02-14 23:29:14,040 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-02-14 23:29:14,040 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-02-14 23:29:14,040 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2023-02-14 23:29:14,041 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2023-02-14 23:29:14,082 INFO  L235             CfgBuilder]: Building ICFG
[2023-02-14 23:29:14,083 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-02-14 23:29:14,207 INFO  L276             CfgBuilder]: Performing block encoding
[2023-02-14 23:29:14,210 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-02-14 23:29:14,210 INFO  L300             CfgBuilder]: Removed 2 assume(true) statements.
[2023-02-14 23:29:14,212 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:29:14 BoogieIcfgContainer
[2023-02-14 23:29:14,212 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-02-14 23:29:14,213 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-02-14 23:29:14,213 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-02-14 23:29:14,215 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-02-14 23:29:14,215 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:29:13" (1/3) ...
[2023-02-14 23:29:14,216 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bdec31b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:29:14, skipping insertion in model container
[2023-02-14 23:29:14,216 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:29:13" (2/3) ...
[2023-02-14 23:29:14,216 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bdec31b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:29:14, skipping insertion in model container
[2023-02-14 23:29:14,216 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:29:14" (3/3) ...
[2023-02-14 23:29:14,217 INFO  L112   eAbstractionObserver]: Analyzing ICFG hard-ll.c
[2023-02-14 23:29:14,227 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-02-14 23:29:14,228 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-02-14 23:29:14,263 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-02-14 23:29:14,268 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;@4c7595ba, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-02-14 23:29:14,268 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-02-14 23:29:14,272 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2023-02-14 23:29:14,277 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2023-02-14 23:29:14,277 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:29:14,278 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:29:14,279 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:29:14,282 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:29:14,282 INFO  L85        PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times
[2023-02-14 23:29:14,288 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:29:14,288 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745379231]
[2023-02-14 23:29:14,288 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:14,288 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:29:14,340 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:29:14,379 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 23:29:14,380 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:29:14,380 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745379231]
[2023-02-14 23:29:14,380 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745379231] provided 1 perfect and 0 imperfect interpolant sequences
[2023-02-14 23:29:14,380 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-02-14 23:29:14,381 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-02-14 23:29:14,382 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655008281]
[2023-02-14 23:29:14,382 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-02-14 23:29:14,384 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2023-02-14 23:29:14,384 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:29:14,418 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2023-02-14 23:29:14,419 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-02-14 23:29:14,420 INFO  L87              Difference]: Start difference. First operand  has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand  has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 23:29:14,435 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:29:14,435 INFO  L93              Difference]: Finished difference Result 49 states and 83 transitions.
[2023-02-14 23:29:14,435 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2023-02-14 23:29:14,436 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 9
[2023-02-14 23:29:14,448 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:29:14,452 INFO  L225             Difference]: With dead ends: 49
[2023-02-14 23:29:14,452 INFO  L226             Difference]: Without dead ends: 22
[2023-02-14 23:29:14,454 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 23:29:14,456 INFO  L413           NwaCegarLoop]: 34 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, 34 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 23:29:14,458 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-02-14 23:29:14,468 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2023-02-14 23:29:14,478 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22.
[2023-02-14 23:29:14,478 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-02-14 23:29:14,479 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions.
[2023-02-14 23:29:14,480 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9
[2023-02-14 23:29:14,480 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:29:14,480 INFO  L495      AbstractCegarLoop]: Abstraction has 22 states and 30 transitions.
[2023-02-14 23:29:14,481 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 23:29:14,481 INFO  L276                IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions.
[2023-02-14 23:29:14,481 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2023-02-14 23:29:14,482 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:29:14,482 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:29:14,482 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-02-14 23:29:14,482 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:29:14,483 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:29:14,483 INFO  L85        PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times
[2023-02-14 23:29:14,483 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:29:14,483 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988831382]
[2023-02-14 23:29:14,483 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:14,483 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:29:14,497 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:29:14,585 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 23:29:14,586 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:29:14,586 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988831382]
[2023-02-14 23:29:14,586 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988831382] provided 1 perfect and 0 imperfect interpolant sequences
[2023-02-14 23:29:14,586 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-02-14 23:29:14,586 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-02-14 23:29:14,587 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458024448]
[2023-02-14 23:29:14,587 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-02-14 23:29:14,588 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-02-14 23:29:14,588 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:29:14,588 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-02-14 23:29:14,589 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-02-14 23:29:14,589 INFO  L87              Difference]: Start difference. First operand 22 states and 30 transitions. Second operand  has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 23:29:14,630 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:29:14,630 INFO  L93              Difference]: Finished difference Result 35 states and 47 transitions.
[2023-02-14 23:29:14,630 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-02-14 23:29:14,631 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 9
[2023-02-14 23:29:14,631 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:29:14,631 INFO  L225             Difference]: With dead ends: 35
[2023-02-14 23:29:14,631 INFO  L226             Difference]: Without dead ends: 33
[2023-02-14 23:29:14,632 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2023-02-14 23:29:14,633 INFO  L413           NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-02-14 23:29:14,633 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-02-14 23:29:14,634 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2023-02-14 23:29:14,638 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26.
[2023-02-14 23:29:14,639 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-02-14 23:29:14,639 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions.
[2023-02-14 23:29:14,640 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9
[2023-02-14 23:29:14,640 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:29:14,640 INFO  L495      AbstractCegarLoop]: Abstraction has 26 states and 33 transitions.
[2023-02-14 23:29:14,640 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 23:29:14,640 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions.
[2023-02-14 23:29:14,641 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2023-02-14 23:29:14,641 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:29:14,641 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:29:14,641 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-02-14 23:29:14,641 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:29:14,642 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:29:14,642 INFO  L85        PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times
[2023-02-14 23:29:14,642 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:29:14,642 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951856526]
[2023-02-14 23:29:14,642 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:14,643 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:29:14,651 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:29:14,735 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2023-02-14 23:29:14,738 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:29:14,744 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 23:29:14,744 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:29:14,744 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951856526]
[2023-02-14 23:29:14,744 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951856526] provided 1 perfect and 0 imperfect interpolant sequences
[2023-02-14 23:29:14,745 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-02-14 23:29:14,745 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-02-14 23:29:14,745 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074279936]
[2023-02-14 23:29:14,745 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-02-14 23:29:14,745 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-02-14 23:29:14,746 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:29:14,746 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-02-14 23:29:14,747 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-02-14 23:29:14,747 INFO  L87              Difference]: Start difference. First operand 26 states and 33 transitions. Second operand  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 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 23:29:14,830 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:29:14,830 INFO  L93              Difference]: Finished difference Result 39 states and 50 transitions.
[2023-02-14 23:29:14,830 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-02-14 23:29:14,830 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 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 14
[2023-02-14 23:29:14,831 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:29:14,831 INFO  L225             Difference]: With dead ends: 39
[2023-02-14 23:29:14,831 INFO  L226             Difference]: Without dead ends: 37
[2023-02-14 23:29:14,832 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2023-02-14 23:29:14,833 INFO  L413           NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-02-14 23:29:14,833 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 88 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-02-14 23:29:14,833 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2023-02-14 23:29:14,839 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30.
[2023-02-14 23:29:14,839 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-02-14 23:29:14,840 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions.
[2023-02-14 23:29:14,840 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14
[2023-02-14 23:29:14,840 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:29:14,840 INFO  L495      AbstractCegarLoop]: Abstraction has 30 states and 36 transitions.
[2023-02-14 23:29:14,840 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 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 23:29:14,841 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions.
[2023-02-14 23:29:14,841 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2023-02-14 23:29:14,841 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:29:14,841 INFO  L195           NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:29:14,841 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-02-14 23:29:14,842 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:29:14,842 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:29:14,842 INFO  L85        PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times
[2023-02-14 23:29:14,842 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:29:14,843 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293930292]
[2023-02-14 23:29:14,843 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:14,843 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:29:14,852 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-02-14 23:29:14,852 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023302879]
[2023-02-14 23:29:14,853 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:14,853 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:14,853 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:29:14,855 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 23:29:14,856 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 23:29:14,894 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:29:14,895 INFO  L263         TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-02-14 23:29:14,899 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:29:15,002 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-02-14 23:29:15,003 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2023-02-14 23:29:15,719 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-02-14 23:29:15,719 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:29:15,720 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293930292]
[2023-02-14 23:29:15,720 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-02-14 23:29:15,720 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023302879]
[2023-02-14 23:29:15,720 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023302879] provided 0 perfect and 2 imperfect interpolant sequences
[2023-02-14 23:29:15,720 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-02-14 23:29:15,720 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12
[2023-02-14 23:29:15,720 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752064829]
[2023-02-14 23:29:15,720 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-02-14 23:29:15,721 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2023-02-14 23:29:15,721 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:29:15,721 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2023-02-14 23:29:15,721 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132
[2023-02-14 23:29:15,722 INFO  L87              Difference]: Start difference. First operand 30 states and 36 transitions. Second operand  has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4)
[2023-02-14 23:29:15,996 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:29:15,996 INFO  L93              Difference]: Finished difference Result 65 states and 84 transitions.
[2023-02-14 23:29:15,997 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-02-14 23:29:15,997 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 19
[2023-02-14 23:29:15,998 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:29:16,000 INFO  L225             Difference]: With dead ends: 65
[2023-02-14 23:29:16,000 INFO  L226             Difference]: Without dead ends: 50
[2023-02-14 23:29:16,001 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182
[2023-02-14 23:29:16,009 INFO  L413           NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-02-14 23:29:16,010 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-02-14 23:29:16,012 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2023-02-14 23:29:16,022 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49.
[2023-02-14 23:29:16,025 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 49 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12)
[2023-02-14 23:29:16,028 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions.
[2023-02-14 23:29:16,028 INFO  L78                 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 19
[2023-02-14 23:29:16,028 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:29:16,028 INFO  L495      AbstractCegarLoop]: Abstraction has 49 states and 60 transitions.
[2023-02-14 23:29:16,029 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4)
[2023-02-14 23:29:16,029 INFO  L276                IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions.
[2023-02-14 23:29:16,029 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2023-02-14 23:29:16,029 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:29:16,030 INFO  L195           NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:29:16,036 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 23:29:16,233 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:16,233 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:29:16,234 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:29:16,234 INFO  L85        PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times
[2023-02-14 23:29:16,234 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:29:16,234 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246358049]
[2023-02-14 23:29:16,234 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:16,235 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:29:16,242 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-02-14 23:29:16,242 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221032266]
[2023-02-14 23:29:16,242 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:16,242 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:16,242 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:29:16,246 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 23:29:16,248 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 23:29:16,271 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:29:16,277 INFO  L263         TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-02-14 23:29:16,278 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:29:16,410 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2023-02-14 23:29:16,410 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-02-14 23:29:16,410 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:29:16,410 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246358049]
[2023-02-14 23:29:16,411 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-02-14 23:29:16,411 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221032266]
[2023-02-14 23:29:16,411 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221032266] provided 1 perfect and 0 imperfect interpolant sequences
[2023-02-14 23:29:16,411 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-02-14 23:29:16,411 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-02-14 23:29:16,411 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052079082]
[2023-02-14 23:29:16,411 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-02-14 23:29:16,412 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-02-14 23:29:16,412 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:29:16,412 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-02-14 23:29:16,412 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2023-02-14 23:29:16,413 INFO  L87              Difference]: Start difference. First operand 49 states and 60 transitions. Second operand  has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2023-02-14 23:29:16,605 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:29:16,605 INFO  L93              Difference]: Finished difference Result 60 states and 69 transitions.
[2023-02-14 23:29:16,606 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-02-14 23:29:16,607 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26
[2023-02-14 23:29:16,607 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:29:16,607 INFO  L225             Difference]: With dead ends: 60
[2023-02-14 23:29:16,607 INFO  L226             Difference]: Without dead ends: 49
[2023-02-14 23:29:16,608 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132
[2023-02-14 23:29:16,608 INFO  L413           NwaCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-02-14 23:29:16,608 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 83 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-02-14 23:29:16,609 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2023-02-14 23:29:16,615 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49.
[2023-02-14 23:29:16,615 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 49 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10)
[2023-02-14 23:29:16,616 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions.
[2023-02-14 23:29:16,616 INFO  L78                 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 26
[2023-02-14 23:29:16,616 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:29:16,616 INFO  L495      AbstractCegarLoop]: Abstraction has 49 states and 56 transitions.
[2023-02-14 23:29:16,616 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2023-02-14 23:29:16,616 INFO  L276                IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions.
[2023-02-14 23:29:16,617 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2023-02-14 23:29:16,617 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:29:16,617 INFO  L195           NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:29:16,627 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 23:29:16,821 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:16,822 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:29:16,822 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:29:16,822 INFO  L85        PathProgramCache]: Analyzing trace with hash -984335949, now seen corresponding path program 1 times
[2023-02-14 23:29:16,822 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:29:16,822 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841192341]
[2023-02-14 23:29:16,823 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:16,823 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:29:16,836 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-02-14 23:29:16,836 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714919905]
[2023-02-14 23:29:16,836 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:16,836 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:16,836 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:29:16,848 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 23:29:16,849 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 23:29:16,887 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:29:16,888 INFO  L263         TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-02-14 23:29:16,889 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:29:17,110 INFO  L134       CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2023-02-14 23:29:17,110 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2023-02-14 23:29:17,667 INFO  L134       CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2023-02-14 23:29:17,668 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:29:17,668 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841192341]
[2023-02-14 23:29:17,668 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-02-14 23:29:17,668 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714919905]
[2023-02-14 23:29:17,668 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714919905] provided 0 perfect and 2 imperfect interpolant sequences
[2023-02-14 23:29:17,668 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-02-14 23:29:17,668 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14
[2023-02-14 23:29:17,668 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123129482]
[2023-02-14 23:29:17,668 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-02-14 23:29:17,668 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2023-02-14 23:29:17,668 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:29:17,669 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2023-02-14 23:29:17,669 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182
[2023-02-14 23:29:17,669 INFO  L87              Difference]: Start difference. First operand 49 states and 56 transitions. Second operand  has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12)
[2023-02-14 23:29:18,581 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:29:18,581 INFO  L93              Difference]: Finished difference Result 90 states and 112 transitions.
[2023-02-14 23:29:18,581 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2023-02-14 23:29:18,581 INFO  L78                 Accepts]: Start accepts. Automaton has  has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 43
[2023-02-14 23:29:18,582 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:29:18,582 INFO  L225             Difference]: With dead ends: 90
[2023-02-14 23:29:18,582 INFO  L226             Difference]: Without dead ends: 86
[2023-02-14 23:29:18,583 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462
[2023-02-14 23:29:18,583 INFO  L413           NwaCegarLoop]: 35 mSDtfsCounter, 70 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-02-14 23:29:18,583 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 135 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-02-14 23:29:18,583 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 86 states.
[2023-02-14 23:29:18,595 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79.
[2023-02-14 23:29:18,596 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 79 states, 49 states have (on average 1.163265306122449) internal successors, (57), 52 states have internal predecessors, (57), 20 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19)
[2023-02-14 23:29:18,596 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions.
[2023-02-14 23:29:18,596 INFO  L78                 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 43
[2023-02-14 23:29:18,597 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:29:18,597 INFO  L495      AbstractCegarLoop]: Abstraction has 79 states and 96 transitions.
[2023-02-14 23:29:18,597 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12)
[2023-02-14 23:29:18,597 INFO  L276                IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions.
[2023-02-14 23:29:18,598 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2023-02-14 23:29:18,598 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:29:18,598 INFO  L195           NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:29:18,609 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-02-14 23:29:18,808 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:18,809 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:29:18,809 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:29:18,809 INFO  L85        PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times
[2023-02-14 23:29:18,809 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:29:18,810 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516260435]
[2023-02-14 23:29:18,810 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:18,810 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:29:18,817 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-02-14 23:29:18,819 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720065114]
[2023-02-14 23:29:18,819 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:18,820 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:18,820 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:29:18,825 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 23:29:18,844 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 23:29:18,877 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:29:18,878 INFO  L263         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjunts are in the unsatisfiable core
[2023-02-14 23:29:18,880 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:29:19,203 INFO  L134       CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked.
[2023-02-14 23:29:19,204 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2023-02-14 23:29:21,607 INFO  L134       CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked.
[2023-02-14 23:29:21,607 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:29:21,607 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516260435]
[2023-02-14 23:29:21,607 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-02-14 23:29:21,607 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720065114]
[2023-02-14 23:29:21,607 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [720065114] provided 0 perfect and 2 imperfect interpolant sequences
[2023-02-14 23:29:21,607 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-02-14 23:29:21,607 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18
[2023-02-14 23:29:21,607 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718918394]
[2023-02-14 23:29:21,607 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-02-14 23:29:21,608 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2023-02-14 23:29:21,608 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:29:21,610 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2023-02-14 23:29:21,611 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306
[2023-02-14 23:29:21,612 INFO  L87              Difference]: Start difference. First operand 79 states and 96 transitions. Second operand  has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16)
[2023-02-14 23:29:29,894 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:29:29,894 INFO  L93              Difference]: Finished difference Result 142 states and 189 transitions.
[2023-02-14 23:29:29,895 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2023-02-14 23:29:29,895 INFO  L78                 Accepts]: Start accepts. Automaton has  has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 56
[2023-02-14 23:29:29,895 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:29:29,897 INFO  L225             Difference]: With dead ends: 142
[2023-02-14 23:29:29,897 INFO  L226             Difference]: Without dead ends: 121
[2023-02-14 23:29:29,897 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056
[2023-02-14 23:29:29,898 INFO  L413           NwaCegarLoop]: 31 mSDtfsCounter, 141 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time
[2023-02-14 23:29:29,898 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 112 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time]
[2023-02-14 23:29:29,898 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 121 states.
[2023-02-14 23:29:29,918 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 93.
[2023-02-14 23:29:29,918 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 93 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23)
[2023-02-14 23:29:29,919 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions.
[2023-02-14 23:29:29,919 INFO  L78                 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 56
[2023-02-14 23:29:29,919 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:29:29,919 INFO  L495      AbstractCegarLoop]: Abstraction has 93 states and 116 transitions.
[2023-02-14 23:29:29,919 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16)
[2023-02-14 23:29:29,920 INFO  L276                IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions.
[2023-02-14 23:29:29,920 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2023-02-14 23:29:29,920 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:29:29,920 INFO  L195           NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:29:29,925 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 23:29:30,124 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:30,125 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:29:30,125 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:29:30,125 INFO  L85        PathProgramCache]: Analyzing trace with hash -1199454569, now seen corresponding path program 1 times
[2023-02-14 23:29:30,125 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:29:30,125 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499514130]
[2023-02-14 23:29:30,125 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:30,126 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:29:30,132 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-02-14 23:29:30,132 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715807261]
[2023-02-14 23:29:30,132 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:30,132 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:30,132 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:29:30,133 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 23:29:30,135 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 23:29:30,173 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:29:30,174 INFO  L263         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 30 conjunts are in the unsatisfiable core
[2023-02-14 23:29:30,176 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:29:30,423 INFO  L134       CoverageAnalysis]: Checked inductivity of 209 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked.
[2023-02-14 23:29:30,423 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2023-02-14 23:29:30,888 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:29:30,888 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499514130]
[2023-02-14 23:29:30,888 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-02-14 23:29:30,888 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715807261]
[2023-02-14 23:29:30,888 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715807261] provided 0 perfect and 1 imperfect interpolant sequences
[2023-02-14 23:29:30,888 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2023-02-14 23:29:30,888 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2023-02-14 23:29:30,888 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911660215]
[2023-02-14 23:29:30,888 INFO  L85    oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2023-02-14 23:29:30,888 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2023-02-14 23:29:30,888 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:29:30,889 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2023-02-14 23:29:30,889 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=249, Unknown=2, NotChecked=0, Total=306
[2023-02-14 23:29:30,889 INFO  L87              Difference]: Start difference. First operand 93 states and 116 transitions. Second operand  has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10)
[2023-02-14 23:29:31,459 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:29:31,460 INFO  L93              Difference]: Finished difference Result 108 states and 132 transitions.
[2023-02-14 23:29:31,460 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2023-02-14 23:29:31,460 INFO  L78                 Accepts]: Start accepts. Automaton has  has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 67
[2023-02-14 23:29:31,461 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:29:31,462 INFO  L225             Difference]: With dead ends: 108
[2023-02-14 23:29:31,462 INFO  L226             Difference]: Without dead ends: 101
[2023-02-14 23:29:31,462 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=566, Unknown=2, NotChecked=0, Total=702
[2023-02-14 23:29:31,463 INFO  L413           NwaCegarLoop]: 22 mSDtfsCounter, 44 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-02-14 23:29:31,463 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 93 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-02-14 23:29:31,464 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2023-02-14 23:29:31,479 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101.
[2023-02-14 23:29:31,480 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 101 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 66 states have internal predecessors, (74), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25)
[2023-02-14 23:29:31,480 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions.
[2023-02-14 23:29:31,481 INFO  L78                 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 67
[2023-02-14 23:29:31,481 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:29:31,481 INFO  L495      AbstractCegarLoop]: Abstraction has 101 states and 125 transitions.
[2023-02-14 23:29:31,481 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10)
[2023-02-14 23:29:31,481 INFO  L276                IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions.
[2023-02-14 23:29:31,482 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 70
[2023-02-14 23:29:31,482 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:29:31,482 INFO  L195           NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:29:31,496 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 23:29:31,688 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:31,689 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:29:31,689 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:29:31,689 INFO  L85        PathProgramCache]: Analyzing trace with hash -843815949, now seen corresponding path program 2 times
[2023-02-14 23:29:31,689 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:29:31,689 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095896091]
[2023-02-14 23:29:31,689 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:31,689 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:29:31,695 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-02-14 23:29:31,695 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049114046]
[2023-02-14 23:29:31,695 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2023-02-14 23:29:31,695 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:31,695 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:29:31,705 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 23:29:31,707 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 23:29:31,746 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2023-02-14 23:29:31,746 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-02-14 23:29:31,747 INFO  L263         TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core
[2023-02-14 23:29:31,752 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:29:31,779 INFO  L134       CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked.
[2023-02-14 23:29:31,779 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2023-02-14 23:29:31,836 INFO  L134       CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked.
[2023-02-14 23:29:31,836 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:29:31,836 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095896091]
[2023-02-14 23:29:31,836 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-02-14 23:29:31,836 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049114046]
[2023-02-14 23:29:31,837 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049114046] provided 0 perfect and 2 imperfect interpolant sequences
[2023-02-14 23:29:31,837 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-02-14 23:29:31,837 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5
[2023-02-14 23:29:31,837 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674085765]
[2023-02-14 23:29:31,837 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-02-14 23:29:31,838 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-02-14 23:29:31,838 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:29:31,838 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-02-14 23:29:31,838 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-02-14 23:29:31,839 INFO  L87              Difference]: Start difference. First operand 101 states and 125 transitions. Second operand  has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15)
[2023-02-14 23:29:31,912 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:29:31,912 INFO  L93              Difference]: Finished difference Result 122 states and 152 transitions.
[2023-02-14 23:29:31,913 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-02-14 23:29:31,913 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 69
[2023-02-14 23:29:31,915 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:29:31,916 INFO  L225             Difference]: With dead ends: 122
[2023-02-14 23:29:31,916 INFO  L226             Difference]: Without dead ends: 88
[2023-02-14 23:29:31,917 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-02-14 23:29:31,919 INFO  L413           NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-02-14 23:29:31,921 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-02-14 23:29:31,921 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 88 states.
[2023-02-14 23:29:31,940 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88.
[2023-02-14 23:29:31,941 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 88 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 58 states have internal predecessors, (65), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21)
[2023-02-14 23:29:31,941 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions.
[2023-02-14 23:29:31,941 INFO  L78                 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 69
[2023-02-14 23:29:31,941 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:29:31,942 INFO  L495      AbstractCegarLoop]: Abstraction has 88 states and 108 transitions.
[2023-02-14 23:29:31,942 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15)
[2023-02-14 23:29:31,942 INFO  L276                IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions.
[2023-02-14 23:29:31,946 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 72
[2023-02-14 23:29:31,946 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:29:31,946 INFO  L195           NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:29:31,955 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-02-14 23:29:32,152 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:32,153 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:29:32,153 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:29:32,153 INFO  L85        PathProgramCache]: Analyzing trace with hash -705600290, now seen corresponding path program 1 times
[2023-02-14 23:29:32,153 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:29:32,153 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65672544]
[2023-02-14 23:29:32,153 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:32,153 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:29:32,158 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-02-14 23:29:32,159 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656874752]
[2023-02-14 23:29:32,159 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:32,159 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:32,159 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:29:32,160 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-02-14 23:29:32,162 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-02-14 23:29:32,194 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:29:32,194 INFO  L263         TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-02-14 23:29:32,196 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:29:32,234 INFO  L134       CoverageAnalysis]: Checked inductivity of 257 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked.
[2023-02-14 23:29:32,235 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-02-14 23:29:32,235 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:29:32,235 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65672544]
[2023-02-14 23:29:32,235 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-02-14 23:29:32,235 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656874752]
[2023-02-14 23:29:32,235 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656874752] provided 1 perfect and 0 imperfect interpolant sequences
[2023-02-14 23:29:32,235 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-02-14 23:29:32,235 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-02-14 23:29:32,236 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189083762]
[2023-02-14 23:29:32,240 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-02-14 23:29:32,241 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-02-14 23:29:32,241 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:29:32,242 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-02-14 23:29:32,242 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2023-02-14 23:29:32,243 INFO  L87              Difference]: Start difference. First operand 88 states and 108 transitions. Second operand  has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)
[2023-02-14 23:29:32,318 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:29:32,318 INFO  L93              Difference]: Finished difference Result 97 states and 118 transitions.
[2023-02-14 23:29:32,318 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-02-14 23:29:32,318 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71
[2023-02-14 23:29:32,319 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:29:32,320 INFO  L225             Difference]: With dead ends: 97
[2023-02-14 23:29:32,320 INFO  L226             Difference]: Without dead ends: 90
[2023-02-14 23:29:32,320 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2023-02-14 23:29:32,321 INFO  L413           NwaCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-02-14 23:29:32,322 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 94 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-02-14 23:29:32,322 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 90 states.
[2023-02-14 23:29:32,340 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90.
[2023-02-14 23:29:32,341 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 90 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 58 states have internal predecessors, (66), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21)
[2023-02-14 23:29:32,342 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions.
[2023-02-14 23:29:32,342 INFO  L78                 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 71
[2023-02-14 23:29:32,342 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:29:32,342 INFO  L495      AbstractCegarLoop]: Abstraction has 90 states and 109 transitions.
[2023-02-14 23:29:32,342 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)
[2023-02-14 23:29:32,343 INFO  L276                IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions.
[2023-02-14 23:29:32,345 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 87
[2023-02-14 23:29:32,345 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:29:32,345 INFO  L195           NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:29:32,355 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-02-14 23:29:32,549 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:32,550 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:29:32,550 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:29:32,550 INFO  L85        PathProgramCache]: Analyzing trace with hash 1412721000, now seen corresponding path program 1 times
[2023-02-14 23:29:32,550 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:29:32,550 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246447000]
[2023-02-14 23:29:32,550 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:32,550 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:29:32,556 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-02-14 23:29:32,556 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720570491]
[2023-02-14 23:29:32,556 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:32,556 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:32,556 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:29:32,563 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-02-14 23:29:32,564 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-02-14 23:29:32,600 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-02-14 23:29:32,600 INFO  L263         TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core
[2023-02-14 23:29:32,602 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:29:32,660 INFO  L134       CoverageAnalysis]: Checked inductivity of 362 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked.
[2023-02-14 23:29:32,660 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-02-14 23:29:32,660 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-02-14 23:29:32,660 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246447000]
[2023-02-14 23:29:32,660 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-02-14 23:29:32,660 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720570491]
[2023-02-14 23:29:32,661 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720570491] provided 1 perfect and 0 imperfect interpolant sequences
[2023-02-14 23:29:32,661 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-02-14 23:29:32,661 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-02-14 23:29:32,661 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784181345]
[2023-02-14 23:29:32,661 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-02-14 23:29:32,662 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-02-14 23:29:32,662 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-02-14 23:29:32,662 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-02-14 23:29:32,663 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-02-14 23:29:32,663 INFO  L87              Difference]: Start difference. First operand 90 states and 109 transitions. Second operand  has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10)
[2023-02-14 23:29:32,701 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-02-14 23:29:32,701 INFO  L93              Difference]: Finished difference Result 110 states and 130 transitions.
[2023-02-14 23:29:32,701 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-02-14 23:29:32,702 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 86
[2023-02-14 23:29:32,702 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-02-14 23:29:32,704 INFO  L225             Difference]: With dead ends: 110
[2023-02-14 23:29:32,704 INFO  L226             Difference]: Without dead ends: 81
[2023-02-14 23:29:32,706 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-02-14 23:29:32,707 INFO  L413           NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-02-14 23:29:32,707 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-02-14 23:29:32,707 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 81 states.
[2023-02-14 23:29:32,725 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81.
[2023-02-14 23:29:32,725 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 81 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17)
[2023-02-14 23:29:32,726 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions.
[2023-02-14 23:29:32,727 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 86
[2023-02-14 23:29:32,727 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-02-14 23:29:32,727 INFO  L495      AbstractCegarLoop]: Abstraction has 81 states and 93 transitions.
[2023-02-14 23:29:32,728 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10)
[2023-02-14 23:29:32,728 INFO  L276                IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions.
[2023-02-14 23:29:32,731 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 87
[2023-02-14 23:29:32,731 INFO  L187           NwaCegarLoop]: Found error trace
[2023-02-14 23:29:32,731 INFO  L195           NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1]
[2023-02-14 23:29:32,738 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-02-14 23:29:32,936 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-02-14 23:29:32,936 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-02-14 23:29:32,936 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-02-14 23:29:32,936 INFO  L85        PathProgramCache]: Analyzing trace with hash -1193302554, now seen corresponding path program 3 times
[2023-02-14 23:29:32,936 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-02-14 23:29:32,937 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546296255]
[2023-02-14 23:29:32,937 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-02-14 23:29:32,937 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-02-14 23:29:32,942 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-02-14 23:29:32,942 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597282121]
[2023-02-14 23:29:32,942 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2023-02-14 23:29:32,942 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-02-14 23:29:32,942 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-02-14 23:29:32,943 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-02-14 23:29:32,945 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-02-14 23:29:33,474 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2023-02-14 23:29:33,474 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-02-14 23:29:33,476 INFO  L263         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 48 conjunts are in the unsatisfiable core
[2023-02-14 23:29:33,478 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2023-02-14 23:29:33,820 INFO  L134       CoverageAnalysis]: Checked inductivity of 362 backedges. 61 proven. 25 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked.
[2023-02-14 23:29:33,820 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2023-02-14 23:30:11,039 WARN  L233               SmtUtils]: Spent 20.47s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2023-02-14 23:32:06,797 WARN  L233               SmtUtils]: Spent 37.85s on a formula simplification that was a NOOP. DAG size: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)