./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/reducercommutativity/rangesum.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4dc91bf2fc8981aab63c1ee768384f1c8f580edfe4618d65089a78f799b6ddb8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 18:21:33,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 18:21:33,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 18:21:33,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 18:21:33,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 18:21:33,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 18:21:33,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 18:21:33,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 18:21:33,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 18:21:33,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 18:21:33,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 18:21:33,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 18:21:33,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 18:21:33,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 18:21:33,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 18:21:33,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 18:21:33,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 18:21:33,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 18:21:33,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 18:21:33,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 18:21:33,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 18:21:33,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 18:21:33,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 18:21:33,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 18:21:33,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 18:21:33,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 18:21:33,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 18:21:33,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 18:21:33,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 18:21:33,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 18:21:33,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 18:21:33,805 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 18:21:33,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 18:21:33,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 18:21:33,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 18:21:33,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 18:21:33,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 18:21:33,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 18:21:33,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 18:21:33,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 18:21:33,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 18:21:33,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 18:21:33,831 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 18:21:33,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 18:21:33,833 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 18:21:33,833 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 18:21:33,834 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 18:21:33,834 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 18:21:33,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 18:21:33,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 18:21:33,835 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 18:21:33,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 18:21:33,836 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 18:21:33,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 18:21:33,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 18:21:33,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 18:21:33,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 18:21:33,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 18:21:33,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 18:21:33,837 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 18:21:33,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 18:21:33,837 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 18:21:33,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 18:21:33,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 18:21:33,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 18:21:33,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 18:21:33,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:21:33,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 18:21:33,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 18:21:33,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 18:21:33,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 18:21:33,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 18:21:33,840 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 18:21:33,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 18:21:33,840 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 18:21:33,840 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 18:21:33,840 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 18:21:33,840 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4dc91bf2fc8981aab63c1ee768384f1c8f580edfe4618d65089a78f799b6ddb8 [2023-02-15 18:21:34,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 18:21:34,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 18:21:34,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 18:21:34,112 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 18:21:34,112 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 18:21:34,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum.i [2023-02-15 18:21:35,269 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 18:21:35,472 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 18:21:35,473 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum.i [2023-02-15 18:21:35,479 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f03278f6/50dd4fb65c8a4d2ca9fbc9da7f437f39/FLAG45da3cd80 [2023-02-15 18:21:35,494 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f03278f6/50dd4fb65c8a4d2ca9fbc9da7f437f39 [2023-02-15 18:21:35,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 18:21:35,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 18:21:35,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 18:21:35,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 18:21:35,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 18:21:35,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:21:35" (1/1) ... [2023-02-15 18:21:35,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217ae20c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:21:35, skipping insertion in model container [2023-02-15 18:21:35,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:21:35" (1/1) ... [2023-02-15 18:21:35,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 18:21:35,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 18:21:35,676 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/reducercommutativity/rangesum.i[1544,1557] [2023-02-15 18:21:35,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:21:35,692 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 18:21:35,709 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/reducercommutativity/rangesum.i[1544,1557] [2023-02-15 18:21:35,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:21:35,722 INFO L208 MainTranslator]: Completed translation [2023-02-15 18:21:35,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:21:35 WrapperNode [2023-02-15 18:21:35,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 18:21:35,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 18:21:35,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 18:21:35,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 18:21:35,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:21:35" (1/1) ... [2023-02-15 18:21:35,736 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:21:35" (1/1) ... [2023-02-15 18:21:35,749 INFO L138 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2023-02-15 18:21:35,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 18:21:35,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 18:21:35,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 18:21:35,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 18:21:35,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:21:35" (1/1) ... [2023-02-15 18:21:35,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:21:35" (1/1) ... [2023-02-15 18:21:35,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:21:35" (1/1) ... [2023-02-15 18:21:35,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:21:35" (1/1) ... [2023-02-15 18:21:35,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:21:35" (1/1) ... [2023-02-15 18:21:35,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:21:35" (1/1) ... [2023-02-15 18:21:35,774 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:21:35" (1/1) ... [2023-02-15 18:21:35,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:21:35" (1/1) ... [2023-02-15 18:21:35,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 18:21:35,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 18:21:35,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 18:21:35,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 18:21:35,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:21:35" (1/1) ... [2023-02-15 18:21:35,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:21:35,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:21:35,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 18:21:35,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 18:21:35,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 18:21:35,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 18:21:35,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 18:21:35,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 18:21:35,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 18:21:35,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 18:21:35,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 18:21:35,864 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2023-02-15 18:21:35,864 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2023-02-15 18:21:35,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 18:21:35,955 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 18:21:35,957 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 18:21:36,187 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 18:21:36,192 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 18:21:36,192 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 18:21:36,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:21:36 BoogieIcfgContainer [2023-02-15 18:21:36,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 18:21:36,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 18:21:36,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 18:21:36,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 18:21:36,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 06:21:35" (1/3) ... [2023-02-15 18:21:36,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4a0c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:21:36, skipping insertion in model container [2023-02-15 18:21:36,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:21:35" (2/3) ... [2023-02-15 18:21:36,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4a0c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:21:36, skipping insertion in model container [2023-02-15 18:21:36,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:21:36" (3/3) ... [2023-02-15 18:21:36,211 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum.i [2023-02-15 18:21:36,231 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 18:21:36,232 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 18:21:36,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 18:21:36,275 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@2a8215ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 18:21:36,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 18:21:36,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:21:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 18:21:36,286 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:36,287 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:36,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:36,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2094119026, now seen corresponding path program 1 times [2023-02-15 18:21:36,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:36,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366457797] [2023-02-15 18:21:36,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:36,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:36,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:21:36,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366457797] [2023-02-15 18:21:36,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 18:21:36,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032302496] [2023-02-15 18:21:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:36,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:36,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:21:36,416 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:21:36,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 18:21:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:36,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 18:21:36,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:21:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 18:21:36,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:21:36,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032302496] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:21:36,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:21:36,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 18:21:36,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84329024] [2023-02-15 18:21:36,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:21:36,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 18:21:36,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:36,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 18:21:36,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:21:36,621 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 18:21:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:21:36,637 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2023-02-15 18:21:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 18:21:36,641 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-02-15 18:21:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:21:36,649 INFO L225 Difference]: With dead ends: 55 [2023-02-15 18:21:36,652 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 18:21:36,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:21:36,659 INFO L413 NwaCegarLoop]: 37 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, 37 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 [2023-02-15 18:21:36,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:21:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 18:21:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-15 18:21:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:21:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-02-15 18:21:36,708 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 30 [2023-02-15 18:21:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:21:36,709 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-02-15 18:21:36,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 18:21:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-02-15 18:21:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 18:21:36,722 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:36,722 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:36,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 18:21:36,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 18:21:36,928 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2142996165, now seen corresponding path program 1 times [2023-02-15 18:21:36,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:36,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196920194] [2023-02-15 18:21:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:36,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:36,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:21:36,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196920194] [2023-02-15 18:21:36,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 18:21:36,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472335920] [2023-02-15 18:21:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:36,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:36,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:21:36,971 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:21:36,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 18:21:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:37,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 18:21:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:21:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 18:21:37,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:21:37,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472335920] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:21:37,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:21:37,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 18:21:37,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866932348] [2023-02-15 18:21:37,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:21:37,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:21:37,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:37,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:21:37,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:21:37,109 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:21:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:21:37,121 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2023-02-15 18:21:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:21:37,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-15 18:21:37,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:21:37,124 INFO L225 Difference]: With dead ends: 49 [2023-02-15 18:21:37,124 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 18:21:37,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:21:37,126 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:21:37,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 57 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:21:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 18:21:37,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-02-15 18:21:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:21:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-02-15 18:21:37,134 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 30 [2023-02-15 18:21:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:21:37,135 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-02-15 18:21:37,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:21:37,135 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-02-15 18:21:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 18:21:37,136 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:37,136 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:37,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 18:21:37,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 18:21:37,348 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:37,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:37,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1650095802, now seen corresponding path program 1 times [2023-02-15 18:21:37,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:37,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289125462] [2023-02-15 18:21:37,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:37,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:37,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 18:21:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:37,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 18:21:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:37,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-15 18:21:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 18:21:37,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:21:37,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289125462] [2023-02-15 18:21:37,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289125462] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:21:37,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:21:37,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 18:21:37,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545194147] [2023-02-15 18:21:37,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:21:37,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:21:37,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:37,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:21:37,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:21:37,590 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 18:21:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:21:37,635 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2023-02-15 18:21:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:21:37,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-02-15 18:21:37,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:21:37,638 INFO L225 Difference]: With dead ends: 55 [2023-02-15 18:21:37,640 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 18:21:37,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:21:37,642 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:21:37,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:21:37,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 18:21:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-02-15 18:21:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:21:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-02-15 18:21:37,657 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 30 [2023-02-15 18:21:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:21:37,657 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-02-15 18:21:37,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 18:21:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-02-15 18:21:37,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 18:21:37,659 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:37,660 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:37,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 18:21:37,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:37,661 INFO L85 PathProgramCache]: Analyzing trace with hash 655585368, now seen corresponding path program 1 times [2023-02-15 18:21:37,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:37,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640756356] [2023-02-15 18:21:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:37,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:37,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 18:21:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:37,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-15 18:21:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:37,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 18:21:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 18:21:37,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:21:37,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640756356] [2023-02-15 18:21:37,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640756356] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:21:37,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624635418] [2023-02-15 18:21:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:37,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:37,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:21:37,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:21:37,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 18:21:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:37,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:21:37,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:21:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 18:21:37,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:21:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 18:21:38,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624635418] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:21:38,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:21:38,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-02-15 18:21:38,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527083221] [2023-02-15 18:21:38,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:21:38,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 18:21:38,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:38,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 18:21:38,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:21:38,024 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 18:21:38,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:21:38,159 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2023-02-15 18:21:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 18:21:38,160 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2023-02-15 18:21:38,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:21:38,166 INFO L225 Difference]: With dead ends: 60 [2023-02-15 18:21:38,166 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 18:21:38,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-15 18:21:38,171 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:21:38,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 94 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:21:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 18:21:38,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2023-02-15 18:21:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:21:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-15 18:21:38,191 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 32 [2023-02-15 18:21:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:21:38,191 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-15 18:21:38,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 18:21:38,191 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-15 18:21:38,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 18:21:38,195 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:38,195 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:38,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 18:21:38,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:38,402 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:38,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:38,402 INFO L85 PathProgramCache]: Analyzing trace with hash -639666182, now seen corresponding path program 1 times [2023-02-15 18:21:38,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:38,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460020944] [2023-02-15 18:21:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:38,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:38,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 18:21:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:38,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 18:21:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:38,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 18:21:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 18:21:38,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:21:38,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460020944] [2023-02-15 18:21:38,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460020944] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:21:38,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:21:38,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 18:21:38,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741967773] [2023-02-15 18:21:38,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:21:38,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 18:21:38,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 18:21:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 18:21:38,546 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:21:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:21:38,583 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2023-02-15 18:21:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 18:21:38,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2023-02-15 18:21:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:21:38,586 INFO L225 Difference]: With dead ends: 55 [2023-02-15 18:21:38,586 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 18:21:38,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 18:21:38,587 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:21:38,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 32 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:21:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 18:21:38,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-02-15 18:21:38,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:21:38,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-02-15 18:21:38,598 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 43 [2023-02-15 18:21:38,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:21:38,599 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-02-15 18:21:38,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:21:38,600 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-02-15 18:21:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 18:21:38,604 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:38,605 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:38,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 18:21:38,606 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:38,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:38,607 INFO L85 PathProgramCache]: Analyzing trace with hash 121342172, now seen corresponding path program 1 times [2023-02-15 18:21:38,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:38,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46967575] [2023-02-15 18:21:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:38,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:38,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 18:21:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:38,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 18:21:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:38,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 18:21:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-15 18:21:38,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:21:38,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46967575] [2023-02-15 18:21:38,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46967575] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:21:38,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:21:38,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 18:21:38,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585723110] [2023-02-15 18:21:38,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:21:38,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 18:21:38,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 18:21:38,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:21:38,927 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:21:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:21:39,003 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2023-02-15 18:21:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 18:21:39,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-02-15 18:21:39,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:21:39,007 INFO L225 Difference]: With dead ends: 63 [2023-02-15 18:21:39,007 INFO L226 Difference]: Without dead ends: 59 [2023-02-15 18:21:39,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-15 18:21:39,008 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:21:39,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 185 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:21:39,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-15 18:21:39,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2023-02-15 18:21:39,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 38 states have internal predecessors, (45), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 18:21:39,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2023-02-15 18:21:39,028 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 45 [2023-02-15 18:21:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:21:39,029 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2023-02-15 18:21:39,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:21:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2023-02-15 18:21:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 18:21:39,032 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:39,032 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:39,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 18:21:39,033 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:39,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1303372657, now seen corresponding path program 1 times [2023-02-15 18:21:39,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:39,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973589629] [2023-02-15 18:21:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:39,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:39,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:21:39,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451995968] [2023-02-15 18:21:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:39,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:39,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:21:39,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:21:39,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 18:21:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:39,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:21:39,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:21:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 18:21:39,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:21:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-15 18:21:39,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:21:39,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973589629] [2023-02-15 18:21:39,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:21:39,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451995968] [2023-02-15 18:21:39,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451995968] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:21:39,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:21:39,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2023-02-15 18:21:39,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282839768] [2023-02-15 18:21:39,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:21:39,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 18:21:39,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:39,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 18:21:39,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-15 18:21:39,272 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:21:39,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:21:39,329 INFO L93 Difference]: Finished difference Result 84 states and 120 transitions. [2023-02-15 18:21:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 18:21:39,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2023-02-15 18:21:39,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:21:39,330 INFO L225 Difference]: With dead ends: 84 [2023-02-15 18:21:39,331 INFO L226 Difference]: Without dead ends: 49 [2023-02-15 18:21:39,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:21:39,332 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:21:39,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:21:39,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-15 18:21:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-02-15 18:21:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.2) internal successors, (48), 41 states have internal predecessors, (48), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 18:21:39,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2023-02-15 18:21:39,339 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 48 [2023-02-15 18:21:39,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:21:39,340 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2023-02-15 18:21:39,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:21:39,340 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2023-02-15 18:21:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 18:21:39,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:39,341 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:39,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 18:21:39,556 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 [2023-02-15 18:21:39,556 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:39,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:39,557 INFO L85 PathProgramCache]: Analyzing trace with hash 729051389, now seen corresponding path program 2 times [2023-02-15 18:21:39,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:39,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480679720] [2023-02-15 18:21:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:39,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:39,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:21:39,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671942507] [2023-02-15 18:21:39,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:21:39,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:39,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:21:39,573 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) [2023-02-15 18:21:39,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 18:21:39,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:21:39,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:21:39,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:21:39,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:21:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-15 18:21:39,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:21:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 18:21:39,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:21:39,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480679720] [2023-02-15 18:21:39,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:21:39,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671942507] [2023-02-15 18:21:39,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671942507] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:21:39,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:21:39,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2023-02-15 18:21:39,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538847330] [2023-02-15 18:21:39,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:21:39,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 18:21:39,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:39,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 18:21:39,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-02-15 18:21:39,853 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:21:40,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:21:40,006 INFO L93 Difference]: Finished difference Result 129 states and 169 transitions. [2023-02-15 18:21:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 18:21:40,007 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2023-02-15 18:21:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:21:40,008 INFO L225 Difference]: With dead ends: 129 [2023-02-15 18:21:40,008 INFO L226 Difference]: Without dead ends: 70 [2023-02-15 18:21:40,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:21:40,013 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 70 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:21:40,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 181 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:21:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-15 18:21:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2023-02-15 18:21:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2023-02-15 18:21:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2023-02-15 18:21:40,031 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 57 [2023-02-15 18:21:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:21:40,032 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2023-02-15 18:21:40,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:21:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2023-02-15 18:21:40,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 18:21:40,033 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:40,033 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:40,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 18:21:40,240 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 [2023-02-15 18:21:40,240 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:40,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:40,241 INFO L85 PathProgramCache]: Analyzing trace with hash 619340959, now seen corresponding path program 3 times [2023-02-15 18:21:40,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:40,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821942732] [2023-02-15 18:21:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:40,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:40,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:21:40,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020058484] [2023-02-15 18:21:40,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:21:40,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:40,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:21:40,264 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) [2023-02-15 18:21:40,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 18:21:40,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 18:21:40,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:21:40,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:21:40,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:21:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 51 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 18:21:40,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:21:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 51 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 18:21:40,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:21:40,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821942732] [2023-02-15 18:21:40,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:21:40,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020058484] [2023-02-15 18:21:40,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020058484] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:21:40,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:21:40,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2023-02-15 18:21:40,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601156655] [2023-02-15 18:21:40,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:21:40,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 18:21:40,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:40,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 18:21:40,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-02-15 18:21:40,603 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:21:40,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:21:40,728 INFO L93 Difference]: Finished difference Result 121 states and 165 transitions. [2023-02-15 18:21:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 18:21:40,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 59 [2023-02-15 18:21:40,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:21:40,732 INFO L225 Difference]: With dead ends: 121 [2023-02-15 18:21:40,732 INFO L226 Difference]: Without dead ends: 64 [2023-02-15 18:21:40,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-15 18:21:40,734 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:21:40,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 75 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:21:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-15 18:21:40,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2023-02-15 18:21:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.15) internal successors, (46), 41 states have internal predecessors, (46), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 18:21:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2023-02-15 18:21:40,744 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 59 [2023-02-15 18:21:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:21:40,744 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2023-02-15 18:21:40,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:21:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2023-02-15 18:21:40,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 18:21:40,745 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:40,746 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:40,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 18:21:40,951 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 [2023-02-15 18:21:40,952 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:40,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:40,953 INFO L85 PathProgramCache]: Analyzing trace with hash 433918235, now seen corresponding path program 1 times [2023-02-15 18:21:40,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:40,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803714947] [2023-02-15 18:21:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:40,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:40,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:21:40,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849453540] [2023-02-15 18:21:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:40,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:40,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:21:40,969 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) [2023-02-15 18:21:40,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 18:21:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:41,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 18:21:41,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:21:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-02-15 18:21:41,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:21:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-02-15 18:21:41,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:21:41,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803714947] [2023-02-15 18:21:41,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:21:41,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849453540] [2023-02-15 18:21:41,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849453540] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:21:41,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:21:41,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2023-02-15 18:21:41,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284942168] [2023-02-15 18:21:41,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:21:41,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 18:21:41,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:41,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 18:21:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-15 18:21:41,236 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:21:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:21:41,346 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2023-02-15 18:21:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 18:21:41,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2023-02-15 18:21:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:21:41,348 INFO L225 Difference]: With dead ends: 78 [2023-02-15 18:21:41,348 INFO L226 Difference]: Without dead ends: 54 [2023-02-15 18:21:41,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:21:41,349 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:21:41,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 67 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:21:41,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-15 18:21:41,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2023-02-15 18:21:41,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 18:21:41,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2023-02-15 18:21:41,357 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 65 [2023-02-15 18:21:41,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:21:41,357 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2023-02-15 18:21:41,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:21:41,358 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2023-02-15 18:21:41,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 18:21:41,358 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:41,358 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:41,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 18:21:41,567 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 [2023-02-15 18:21:41,567 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:41,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1262430211, now seen corresponding path program 2 times [2023-02-15 18:21:41,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:41,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016627627] [2023-02-15 18:21:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:41,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:41,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:21:41,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110646166] [2023-02-15 18:21:41,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:21:41,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:41,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:21:41,596 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) [2023-02-15 18:21:41,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 18:21:41,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:21:41,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-02-15 18:21:41,735 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 18:21:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 18:21:41,820 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 18:21:41,820 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-15 18:21:41,821 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 18:21:41,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 18:21:42,028 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 [2023-02-15 18:21:42,031 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:42,033 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 18:21:42,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 06:21:42 BoogieIcfgContainer [2023-02-15 18:21:42,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 18:21:42,095 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 18:21:42,095 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 18:21:42,096 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 18:21:42,096 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:21:36" (3/4) ... [2023-02-15 18:21:42,098 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-15 18:21:42,161 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 18:21:42,162 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 18:21:42,162 INFO L158 Benchmark]: Toolchain (without parser) took 6664.78ms. Allocated memory was 140.5MB in the beginning and 169.9MB in the end (delta: 29.4MB). Free memory was 96.7MB in the beginning and 119.1MB in the end (delta: -22.4MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. [2023-02-15 18:21:42,163 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 109.1MB. Free memory was 48.8MB in the beginning and 48.7MB in the end (delta: 102.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 18:21:42,163 INFO L158 Benchmark]: CACSL2BoogieTranslator took 221.68ms. Allocated memory is still 140.5MB. Free memory was 96.4MB in the beginning and 85.9MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 18:21:42,163 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.20ms. Allocated memory is still 140.5MB. Free memory was 85.9MB in the beginning and 84.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 18:21:42,163 INFO L158 Benchmark]: Boogie Preprocessor took 25.82ms. Allocated memory is still 140.5MB. Free memory was 84.2MB in the beginning and 82.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 18:21:42,164 INFO L158 Benchmark]: RCFGBuilder took 417.13ms. Allocated memory is still 140.5MB. Free memory was 82.8MB in the beginning and 70.6MB in the end (delta: 12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 18:21:42,164 INFO L158 Benchmark]: TraceAbstraction took 5890.30ms. Allocated memory was 140.5MB in the beginning and 169.9MB in the end (delta: 29.4MB). Free memory was 111.1MB in the beginning and 123.3MB in the end (delta: -12.3MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. [2023-02-15 18:21:42,164 INFO L158 Benchmark]: Witness Printer took 66.44ms. Allocated memory is still 169.9MB. Free memory was 123.3MB in the beginning and 119.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-15 18:21:42,166 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 109.1MB. Free memory was 48.8MB in the beginning and 48.7MB in the end (delta: 102.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 221.68ms. Allocated memory is still 140.5MB. Free memory was 96.4MB in the beginning and 85.9MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.20ms. Allocated memory is still 140.5MB. Free memory was 85.9MB in the beginning and 84.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.82ms. Allocated memory is still 140.5MB. Free memory was 84.2MB in the beginning and 82.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 417.13ms. Allocated memory is still 140.5MB. Free memory was 82.8MB in the beginning and 70.6MB in the end (delta: 12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 5890.30ms. Allocated memory was 140.5MB in the beginning and 169.9MB in the end (delta: 29.4MB). Free memory was 111.1MB in the beginning and 123.3MB in the end (delta: -12.3MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. * Witness Printer took 66.44ms. Allocated memory is still 169.9MB. Free memory was 123.3MB in the beginning and 119.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 64]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int N; VAL [N=0] [L43] N = __VERIFIER_nondet_int() [L44] COND TRUE N > 1 [L45] int x[N]; [L46] CALL init_nondet(x) [L17] int i; [L18] i = 0 VAL [i=0, N=3, x={3:0}, x={3:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [i=1, N=3, x={3:0}, x={3:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [i=2, N=3, x={3:0}, x={3:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [i=3, N=3, x={3:0}, x={3:0}] [L18] COND FALSE !(i < N) VAL [i=3, N=3, x={3:0}, x={3:0}] [L46] RET init_nondet(x) [L47] int temp; [L48] int ret; [L49] int ret2; [L50] int ret5; VAL [N=3, x={3:0}] [L52] CALL, EXPR rangesum(x) VAL [N=3, x={3:0}] [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [cnt=1, i=2, N=3, ret=-1, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=1, i=3, N=3, ret=-1, x={3:0}, x={3:0}] [L29] COND FALSE !(i < N) VAL [cnt=1, i=3, N=3, ret=-1, x={3:0}, x={3:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [\result=-1, cnt=1, i=3, N=3, ret=-1, x={3:0}, x={3:0}] [L52] RET, EXPR rangesum(x) VAL [N=3, rangesum(x)=-1, x={3:0}] [L52] ret = rangesum(x) [L54] EXPR x[0] [L54] temp=x[0] [L54] EXPR x[1] [L54] x[0] = x[1] [L54] x[1] = temp VAL [N=3, ret=-1, temp=-3, x={3:0}] [L55] CALL, EXPR rangesum(x) VAL [N=3, x={3:0}] [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [cnt=1, i=2, N=3, ret=-1, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=1, i=3, N=3, ret=-1, x={3:0}, x={3:0}] [L29] COND FALSE !(i < N) VAL [cnt=1, i=3, N=3, ret=-1, x={3:0}, x={3:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [\result=-1, cnt=1, i=3, N=3, ret=-1, x={3:0}, x={3:0}] [L55] RET, EXPR rangesum(x) VAL [N=3, rangesum(x)=-1, ret=-1, temp=-3, x={3:0}] [L55] ret2 = rangesum(x) [L56] EXPR x[0] [L56] temp=x[0] [L57] int i =0 ; VAL [i=0, N=3, ret=-1, ret2=-1, temp=-2, x={3:0}] [L57] COND TRUE i N/2) VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [cnt=1, i=2, N=3, ret=-2, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L29] COND FALSE !(i < N) VAL [cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [\result=-2, cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L61] RET, EXPR rangesum(x) VAL [i=2, N=3, rangesum(x)=-2, ret=-1, ret2=-1, temp=-2, x={3:0}] [L61] ret5 = rangesum(x) [L63] COND TRUE ret != ret2 || ret !=ret5 VAL [i=2, N=3, ret=-1, ret2=-1, ret5=-2, temp=-2, x={3:0}] [L64] reach_error() VAL [i=2, N=3, ret=-1, ret2=-1, ret5=-2, temp=-2, x={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.8s, OverallIterations: 11, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 226 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 221 mSDsluCounter, 819 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 560 mSDsCounter, 49 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 742 IncrementalHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 49 mSolverCounterUnsat, 259 mSDtfsCounter, 742 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 631 GetRequests, 549 SyntacticMatches, 14 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=8, InterpolantAutomatonStates: 74, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 40 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 598 NumberOfCodeBlocks, 582 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 716 ConstructedInterpolants, 0 QuantifiedInterpolants, 1531 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1267 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 16 InterpolantComputations, 5 PerfectInterpolantSequences, 899/1014 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-15 18:21:42,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE