./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum5.c --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/array-crafted/zero_sum5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1caf94d5755d978efe1a3e5e557e469a697b8b845c60d509025c0b6bf4eae4ae --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 18:35:19,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 18:35:19,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 18:35:19,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 18:35:19,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 18:35:19,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 18:35:19,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 18:35:19,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 18:35:19,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 18:35:19,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 18:35:19,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 18:35:19,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 18:35:19,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 18:35:19,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 18:35:19,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 18:35:19,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 18:35:19,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 18:35:19,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 18:35:19,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 18:35:19,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 18:35:19,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 18:35:19,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 18:35:19,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 18:35:19,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 18:35:19,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 18:35:19,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 18:35:19,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 18:35:19,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 18:35:19,887 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 18:35:19,888 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 18:35:19,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 18:35:19,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 18:35:19,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 18:35:19,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 18:35:19,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 18:35:19,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 18:35:19,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 18:35:19,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 18:35:19,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 18:35:19,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 18:35:19,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 18:35:19,895 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 18:35:19,929 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 18:35:19,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 18:35:19,930 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 18:35:19,930 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 18:35:19,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 18:35:19,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 18:35:19,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 18:35:19,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 18:35:19,932 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 18:35:19,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 18:35:19,933 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 18:35:19,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 18:35:19,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 18:35:19,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 18:35:19,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 18:35:19,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 18:35:19,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 18:35:19,935 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 18:35:19,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 18:35:19,935 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 18:35:19,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 18:35:19,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 18:35:19,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 18:35:19,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 18:35:19,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:35:19,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 18:35:19,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 18:35:19,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 18:35:19,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 18:35:19,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 18:35:19,937 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 18:35:19,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 18:35:19,938 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 18:35:19,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 18:35:19,938 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 18:35:19,938 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1caf94d5755d978efe1a3e5e557e469a697b8b845c60d509025c0b6bf4eae4ae [2023-02-15 18:35:20,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 18:35:20,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 18:35:20,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 18:35:20,177 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 18:35:20,177 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 18:35:20,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum5.c [2023-02-15 18:35:21,317 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 18:35:21,512 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 18:35:21,513 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum5.c [2023-02-15 18:35:21,519 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8edbc1977/231cda5ff6a5464a84d8ab2f3519e38a/FLAG6daaf169f [2023-02-15 18:35:21,533 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8edbc1977/231cda5ff6a5464a84d8ab2f3519e38a [2023-02-15 18:35:21,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 18:35:21,537 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 18:35:21,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 18:35:21,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 18:35:21,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 18:35:21,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:35:21" (1/1) ... [2023-02-15 18:35:21,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@315c9a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:35:21, skipping insertion in model container [2023-02-15 18:35:21,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:35:21" (1/1) ... [2023-02-15 18:35:21,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 18:35:21,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 18:35:21,671 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/array-crafted/zero_sum5.c[400,413] [2023-02-15 18:35:21,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:35:21,698 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 18:35:21,706 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/array-crafted/zero_sum5.c[400,413] [2023-02-15 18:35:21,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:35:21,730 INFO L208 MainTranslator]: Completed translation [2023-02-15 18:35:21,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:35:21 WrapperNode [2023-02-15 18:35:21,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 18:35:21,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 18:35:21,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 18:35:21,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 18:35:21,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:35:21" (1/1) ... [2023-02-15 18:35:21,756 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:35:21" (1/1) ... [2023-02-15 18:35:21,785 INFO L138 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2023-02-15 18:35:21,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 18:35:21,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 18:35:21,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 18:35:21,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 18:35:21,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:35:21" (1/1) ... [2023-02-15 18:35:21,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:35:21" (1/1) ... [2023-02-15 18:35:21,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:35:21" (1/1) ... [2023-02-15 18:35:21,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:35:21" (1/1) ... [2023-02-15 18:35:21,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:35:21" (1/1) ... [2023-02-15 18:35:21,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:35:21" (1/1) ... [2023-02-15 18:35:21,805 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:35:21" (1/1) ... [2023-02-15 18:35:21,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:35:21" (1/1) ... [2023-02-15 18:35:21,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 18:35:21,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 18:35:21,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 18:35:21,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 18:35:21,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:35:21" (1/1) ... [2023-02-15 18:35:21,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:35:21,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:35:21,837 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 18:35:21,838 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 18:35:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 18:35:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 18:35:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 18:35:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 18:35:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 18:35:21,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 18:35:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 18:35:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 18:35:21,939 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 18:35:21,941 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 18:35:22,133 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 18:35:22,139 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 18:35:22,148 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2023-02-15 18:35:22,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:35:22 BoogieIcfgContainer [2023-02-15 18:35:22,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 18:35:22,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 18:35:22,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 18:35:22,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 18:35:22,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 06:35:21" (1/3) ... [2023-02-15 18:35:22,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a3c8b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:35:22, skipping insertion in model container [2023-02-15 18:35:22,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:35:21" (2/3) ... [2023-02-15 18:35:22,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a3c8b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:35:22, skipping insertion in model container [2023-02-15 18:35:22,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:35:22" (3/3) ... [2023-02-15 18:35:22,190 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum5.c [2023-02-15 18:35:22,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 18:35:22,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 18:35:22,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 18:35:22,279 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;@523220cc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 18:35:22,280 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 18:35:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 18:35:22,288 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:35:22,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 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 18:35:22,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:35:22,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:35:22,294 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2023-02-15 18:35:22,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:35:22,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103378444] [2023-02-15 18:35:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:35:22,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:35:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:35:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:35:22,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:35:22,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103378444] [2023-02-15 18:35:22,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103378444] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:35:22,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:35:22,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 18:35:22,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647351421] [2023-02-15 18:35:22,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:35:22,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 18:35:22,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:35:22,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 18:35:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:35:22,522 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:35:22,552 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2023-02-15 18:35:22,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 18:35:22,554 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 18:35:22,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:35:22,561 INFO L225 Difference]: With dead ends: 83 [2023-02-15 18:35:22,561 INFO L226 Difference]: Without dead ends: 39 [2023-02-15 18:35:22,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:35:22,571 INFO L413 NwaCegarLoop]: 55 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, 55 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 18:35:22,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:35:22,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-15 18:35:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-02-15 18:35:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-02-15 18:35:22,613 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2023-02-15 18:35:22,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:35:22,613 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-02-15 18:35:22,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:22,614 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-02-15 18:35:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 18:35:22,615 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:35:22,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 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 18:35:22,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 18:35:22,616 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:35:22,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:35:22,617 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2023-02-15 18:35:22,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:35:22,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843490249] [2023-02-15 18:35:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:35:22,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:35:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:35:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:35:22,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:35:22,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843490249] [2023-02-15 18:35:22,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843490249] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:35:22,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:35:22,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 18:35:22,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918787300] [2023-02-15 18:35:22,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:35:22,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:35:22,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:35:22,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:35:22,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:35:22,819 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:22,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:35:22,873 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2023-02-15 18:35:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:35:22,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 18:35:22,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:35:22,875 INFO L225 Difference]: With dead ends: 75 [2023-02-15 18:35:22,875 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 18:35:22,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 18:35:22,876 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:35:22,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 70 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:35:22,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 18:35:22,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-02-15 18:35:22,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-02-15 18:35:22,886 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2023-02-15 18:35:22,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:35:22,887 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-02-15 18:35:22,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:22,887 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-02-15 18:35:22,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 18:35:22,888 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:35:22,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 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 18:35:22,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 18:35:22,889 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:35:22,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:35:22,890 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2023-02-15 18:35:22,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:35:22,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213784843] [2023-02-15 18:35:22,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:35:22,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:35:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:35:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 18:35:23,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:35:23,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213784843] [2023-02-15 18:35:23,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213784843] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:35:23,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:35:23,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 18:35:23,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475560819] [2023-02-15 18:35:23,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:35:23,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 18:35:23,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:35:23,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 18:35:23,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 18:35:23,036 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:35:23,183 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2023-02-15 18:35:23,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 18:35:23,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-15 18:35:23,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:35:23,191 INFO L225 Difference]: With dead ends: 91 [2023-02-15 18:35:23,191 INFO L226 Difference]: Without dead ends: 60 [2023-02-15 18:35:23,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 18:35:23,199 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:35:23,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:35:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-15 18:35:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2023-02-15 18:35:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-02-15 18:35:23,214 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2023-02-15 18:35:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:35:23,214 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-02-15 18:35:23,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-02-15 18:35:23,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 18:35:23,216 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:35:23,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:23,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 18:35:23,218 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:35:23,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:35:23,219 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2023-02-15 18:35:23,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:35:23,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261311438] [2023-02-15 18:35:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:35:23,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:35:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:35:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 18:35:23,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:35:23,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261311438] [2023-02-15 18:35:23,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261311438] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:35:23,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982148968] [2023-02-15 18:35:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:35:23,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:35:23,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:35:23,379 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 18:35:23,401 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 18:35:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:35:23,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:35:23,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:35:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 18:35:23,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:35:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 18:35:23,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982148968] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:35:23,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:35:23,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 18:35:23,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035650945] [2023-02-15 18:35:23,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:35:23,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 18:35:23,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:35:23,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 18:35:23,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-15 18:35:23,604 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:35:23,674 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2023-02-15 18:35:23,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 18:35:23,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-02-15 18:35:23,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:35:23,675 INFO L225 Difference]: With dead ends: 97 [2023-02-15 18:35:23,676 INFO L226 Difference]: Without dead ends: 53 [2023-02-15 18:35:23,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-15 18:35:23,677 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:35:23,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 116 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:35:23,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-15 18:35:23,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-02-15 18:35:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2023-02-15 18:35:23,683 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2023-02-15 18:35:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:35:23,684 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2023-02-15 18:35:23,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2023-02-15 18:35:23,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 18:35:23,685 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:35:23,685 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:23,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 18:35:23,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:35:23,894 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:35:23,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:35:23,895 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2023-02-15 18:35:23,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:35:23,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754125494] [2023-02-15 18:35:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:35:23,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:35:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:35:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 18:35:24,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:35:24,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754125494] [2023-02-15 18:35:24,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754125494] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:35:24,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727461638] [2023-02-15 18:35:24,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:35:24,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:35:24,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:35:24,041 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 18:35:24,066 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 18:35:24,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:35:24,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:35:24,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:35:24,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:35:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 18:35:24,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:35:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 18:35:24,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727461638] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:35:24,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:35:24,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-15 18:35:24,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241987140] [2023-02-15 18:35:24,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:35:24,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 18:35:24,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:35:24,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 18:35:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-15 18:35:24,315 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:35:24,483 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2023-02-15 18:35:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 18:35:24,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-15 18:35:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:35:24,484 INFO L225 Difference]: With dead ends: 122 [2023-02-15 18:35:24,485 INFO L226 Difference]: Without dead ends: 82 [2023-02-15 18:35:24,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:35:24,486 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:35:24,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 33 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:35:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-15 18:35:24,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2023-02-15 18:35:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2023-02-15 18:35:24,493 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2023-02-15 18:35:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:35:24,494 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2023-02-15 18:35:24,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2023-02-15 18:35:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 18:35:24,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:35:24,497 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2023-02-15 18:35:24,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 18:35:24,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:35:24,703 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:35:24,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:35:24,703 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2023-02-15 18:35:24,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:35:24,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822652830] [2023-02-15 18:35:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:35:24,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:35:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:35:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:35:29,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:35:29,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822652830] [2023-02-15 18:35:29,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822652830] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:35:29,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501194493] [2023-02-15 18:35:29,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:35:29,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:35:29,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:35:29,615 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 18:35:29,646 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 18:35:29,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 18:35:29,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:35:29,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-15 18:35:29,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:35:31,585 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:35:31,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:35:31,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2023-02-15 18:35:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:35:31,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:35:38,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:35:38,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 163 [2023-02-15 18:35:45,025 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-02-15 18:35:45,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 28 [2023-02-15 18:35:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:35:45,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501194493] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:35:45,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:35:45,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 30] total 58 [2023-02-15 18:35:45,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201674686] [2023-02-15 18:35:45,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:35:45,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-15 18:35:45,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:35:45,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-15 18:35:45,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=3003, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 18:35:45,395 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 58 states, 58 states have (on average 3.396551724137931) internal successors, (197), 58 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:35:53,190 INFO L93 Difference]: Finished difference Result 197 states and 227 transitions. [2023-02-15 18:35:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 18:35:53,191 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.396551724137931) internal successors, (197), 58 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-15 18:35:53,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:35:53,193 INFO L225 Difference]: With dead ends: 197 [2023-02-15 18:35:53,193 INFO L226 Difference]: Without dead ends: 191 [2023-02-15 18:35:53,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 80 SyntacticMatches, 60 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2675 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=652, Invalid=5828, Unknown=0, NotChecked=0, Total=6480 [2023-02-15 18:35:53,197 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 128 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-15 18:35:53,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 192 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-15 18:35:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-02-15 18:35:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 125. [2023-02-15 18:35:53,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 124 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2023-02-15 18:35:53,215 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2023-02-15 18:35:53,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:35:53,216 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2023-02-15 18:35:53,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.396551724137931) internal successors, (197), 58 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:53,216 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2023-02-15 18:35:53,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 18:35:53,217 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:35:53,217 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2023-02-15 18:35:53,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 18:35:53,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:35:53,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:35:53,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:35:53,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2023-02-15 18:35:53,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:35:53,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485846909] [2023-02-15 18:35:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:35:53,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:35:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:35:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 18:35:53,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:35:53,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485846909] [2023-02-15 18:35:53,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485846909] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:35:53,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608718981] [2023-02-15 18:35:53,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:35:53,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:35:53,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:35:53,561 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 18:35:53,568 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 18:35:53,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:35:53,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:35:53,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:35:53,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:35:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 18:35:53,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:35:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 18:35:53,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608718981] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:35:53,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:35:53,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-15 18:35:53,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322417046] [2023-02-15 18:35:53,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:35:53,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 18:35:53,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:35:53,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 18:35:53,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-15 18:35:53,832 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:35:54,327 INFO L93 Difference]: Finished difference Result 342 states and 395 transitions. [2023-02-15 18:35:54,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 18:35:54,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-02-15 18:35:54,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:35:54,329 INFO L225 Difference]: With dead ends: 342 [2023-02-15 18:35:54,329 INFO L226 Difference]: Without dead ends: 168 [2023-02-15 18:35:54,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 133 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-02-15 18:35:54,330 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 285 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 18:35:54,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 77 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 18:35:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-15 18:35:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2023-02-15 18:35:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 139 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2023-02-15 18:35:54,344 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 73 [2023-02-15 18:35:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:35:54,344 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2023-02-15 18:35:54,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2023-02-15 18:35:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-15 18:35:54,345 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:35:54,346 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2023-02-15 18:35:54,353 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 18:35:54,551 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 18:35:54,551 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:35:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:35:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1072452492, now seen corresponding path program 5 times [2023-02-15 18:35:54,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:35:54,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287367975] [2023-02-15 18:35:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:35:54,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:35:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:35:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-15 18:35:54,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:35:54,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287367975] [2023-02-15 18:35:54,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287367975] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:35:54,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809367778] [2023-02-15 18:35:54,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:35:54,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:35:54,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:35:54,677 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 18:35:54,704 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 18:35:54,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 18:35:54,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:35:54,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:35:54,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:35:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-15 18:35:54,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:35:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-15 18:35:55,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809367778] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:35:55,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:35:55,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-15 18:35:55,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592852238] [2023-02-15 18:35:55,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:35:55,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 18:35:55,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:35:55,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 18:35:55,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-15 18:35:55,031 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:55,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:35:55,335 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2023-02-15 18:35:55,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 18:35:55,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-15 18:35:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:35:55,336 INFO L225 Difference]: With dead ends: 156 [2023-02-15 18:35:55,336 INFO L226 Difference]: Without dead ends: 104 [2023-02-15 18:35:55,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 137 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2023-02-15 18:35:55,337 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 263 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:35:55,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 42 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:35:55,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-15 18:35:55,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2023-02-15 18:35:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:55,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2023-02-15 18:35:55,346 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2023-02-15 18:35:55,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:35:55,347 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2023-02-15 18:35:55,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:35:55,347 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2023-02-15 18:35:55,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-15 18:35:55,348 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:35:55,348 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:35:55,357 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 18:35:55,554 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 18:35:55,554 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:35:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:35:55,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2023-02-15 18:35:55,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:35:55,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831140641] [2023-02-15 18:35:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:35:55,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:35:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:36:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:36:02,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:36:02,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831140641] [2023-02-15 18:36:02,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831140641] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:36:02,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030734531] [2023-02-15 18:36:02,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:36:02,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:36:02,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:36:02,224 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 18:36:02,225 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 18:36:02,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 18:36:02,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:36:02,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 141 conjunts are in the unsatisfiable core [2023-02-15 18:36:02,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:36:02,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 18:36:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:36:05,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:37:16,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 136 [2023-02-15 18:37:16,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:37:16,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1076 treesize of output 873 [2023-02-15 18:37:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 4 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:37:25,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030734531] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:37:25,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:37:25,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 44] total 124 [2023-02-15 18:37:25,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888293774] [2023-02-15 18:37:25,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:37:25,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2023-02-15 18:37:25,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:37:25,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2023-02-15 18:37:25,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1063, Invalid=14169, Unknown=20, NotChecked=0, Total=15252 [2023-02-15 18:37:25,750 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 124 states, 124 states have (on average 1.9838709677419355) internal successors, (246), 124 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:37:40,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:37:40,961 INFO L93 Difference]: Finished difference Result 315 states and 364 transitions. [2023-02-15 18:37:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-15 18:37:40,962 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.9838709677419355) internal successors, (246), 124 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-02-15 18:37:40,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:37:40,963 INFO L225 Difference]: With dead ends: 315 [2023-02-15 18:37:40,963 INFO L226 Difference]: Without dead ends: 189 [2023-02-15 18:37:40,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 99 SyntacticMatches, 36 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11433 ImplicationChecksByTransitivity, 82.9s TimeCoverageRelationStatistics Valid=2191, Invalid=25845, Unknown=20, NotChecked=0, Total=28056 [2023-02-15 18:37:40,968 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 480 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 8245 mSolverCounterSat, 1833 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 10078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1833 IncrementalHoareTripleChecker+Valid, 8245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:37:40,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 350 Invalid, 10078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1833 Valid, 8245 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-02-15 18:37:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-15 18:37:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 118. [2023-02-15 18:37:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 117 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:37:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 132 transitions. [2023-02-15 18:37:41,004 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 132 transitions. Word has length 93 [2023-02-15 18:37:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:37:41,004 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 132 transitions. [2023-02-15 18:37:41,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.9838709677419355) internal successors, (246), 124 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:37:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 132 transitions. [2023-02-15 18:37:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-02-15 18:37:41,006 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:37:41,006 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:37:41,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 18:37:41,212 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 18:37:41,213 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:37:41,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:37:41,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1043937034, now seen corresponding path program 7 times [2023-02-15 18:37:41,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:37:41,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404472869] [2023-02-15 18:37:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:37:41,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:37:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:37:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-15 18:37:41,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:37:41,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404472869] [2023-02-15 18:37:41,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404472869] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:37:41,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514147670] [2023-02-15 18:37:41,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:37:41,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:37:41,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:37:41,374 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 18:37:41,377 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 18:37:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:37:41,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 18:37:41,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:37:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-15 18:37:41,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:37:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-15 18:37:41,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514147670] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:37:41,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:37:41,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-15 18:37:41,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625842405] [2023-02-15 18:37:41,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:37:41,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 18:37:41,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:37:41,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 18:37:41,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-02-15 18:37:41,614 INFO L87 Difference]: Start difference. First operand 118 states and 132 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:37:41,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:37:41,905 INFO L93 Difference]: Finished difference Result 221 states and 251 transitions. [2023-02-15 18:37:41,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 18:37:41,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2023-02-15 18:37:41,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:37:41,906 INFO L225 Difference]: With dead ends: 221 [2023-02-15 18:37:41,906 INFO L226 Difference]: Without dead ends: 126 [2023-02-15 18:37:41,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 196 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2023-02-15 18:37:41,907 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 572 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:37:41,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 47 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:37:41,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-15 18:37:41,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2023-02-15 18:37:41,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:37:41,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2023-02-15 18:37:41,936 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 105 [2023-02-15 18:37:41,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:37:41,936 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2023-02-15 18:37:41,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:37:41,937 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2023-02-15 18:37:41,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-15 18:37:41,938 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:37:41,938 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 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 18:37:41,948 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 18:37:42,144 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 18:37:42,144 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:37:42,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:37:42,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1433123212, now seen corresponding path program 8 times [2023-02-15 18:37:42,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:37:42,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733816111] [2023-02-15 18:37:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:37:42,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:37:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:37:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:37:52,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:37:52,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733816111] [2023-02-15 18:37:52,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733816111] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:37:52,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090192636] [2023-02-15 18:37:52,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:37:52,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:37:52,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:37:52,305 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 18:37:52,308 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 18:37:52,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:37:52,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:37:52,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 180 conjunts are in the unsatisfiable core [2023-02-15 18:37:52,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:37:52,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 18:37:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:37:55,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:37:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 18:37:57,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090192636] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:37:57,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:37:57,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 24, 19] total 100 [2023-02-15 18:37:57,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504918491] [2023-02-15 18:37:57,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:37:57,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-02-15 18:37:57,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:37:57,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-02-15 18:37:57,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=9404, Unknown=0, NotChecked=0, Total=9900 [2023-02-15 18:37:57,866 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 100 states, 100 states have (on average 3.02) internal successors, (302), 100 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:38:07,333 INFO L93 Difference]: Finished difference Result 248 states and 276 transitions. [2023-02-15 18:38:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 18:38:07,334 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.02) internal successors, (302), 100 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-02-15 18:38:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:38:07,336 INFO L225 Difference]: With dead ends: 248 [2023-02-15 18:38:07,336 INFO L226 Difference]: Without dead ends: 244 [2023-02-15 18:38:07,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 174 SyntacticMatches, 50 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8433 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=1248, Invalid=18492, Unknown=0, NotChecked=0, Total=19740 [2023-02-15 18:38:07,338 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 385 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 6697 mSolverCounterSat, 1422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 8119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1422 IncrementalHoareTripleChecker+Valid, 6697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-02-15 18:38:07,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 197 Invalid, 8119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1422 Valid, 6697 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-02-15 18:38:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-15 18:38:07,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 121. [2023-02-15 18:38:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1) internal successors, (132), 120 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:07,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2023-02-15 18:38:07,370 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 115 [2023-02-15 18:38:07,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:38:07,371 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2023-02-15 18:38:07,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.02) internal successors, (302), 100 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:07,371 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2023-02-15 18:38:07,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-02-15 18:38:07,372 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:38:07,372 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 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 18:38:07,378 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 18:38:07,575 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 18:38:07,576 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:38:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:38:07,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1506332182, now seen corresponding path program 9 times [2023-02-15 18:38:07,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:38:07,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947314056] [2023-02-15 18:38:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:38:07,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:38:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:38:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-15 18:38:07,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:38:07,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947314056] [2023-02-15 18:38:07,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947314056] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:38:07,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678153505] [2023-02-15 18:38:07,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:38:07,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:38:07,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:38:07,777 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:38:07,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 18:38:07,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 18:38:07,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:38:07,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 18:38:07,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:38:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-15 18:38:08,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:38:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-15 18:38:08,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678153505] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:38:08,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:38:08,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-02-15 18:38:08,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331713100] [2023-02-15 18:38:08,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:38:08,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 18:38:08,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:38:08,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 18:38:08,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-02-15 18:38:08,092 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:08,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:38:08,796 INFO L93 Difference]: Finished difference Result 452 states and 499 transitions. [2023-02-15 18:38:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 18:38:08,797 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-02-15 18:38:08,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:38:08,798 INFO L225 Difference]: With dead ends: 452 [2023-02-15 18:38:08,798 INFO L226 Difference]: Without dead ends: 153 [2023-02-15 18:38:08,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 223 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 18:38:08,799 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 457 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 18:38:08,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 78 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 18:38:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-15 18:38:08,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 136. [2023-02-15 18:38:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0814814814814815) internal successors, (146), 135 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2023-02-15 18:38:08,832 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 117 [2023-02-15 18:38:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:38:08,832 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2023-02-15 18:38:08,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2023-02-15 18:38:08,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-02-15 18:38:08,833 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:38:08,833 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 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 18:38:08,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 18:38:09,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:38:09,042 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:38:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:38:09,042 INFO L85 PathProgramCache]: Analyzing trace with hash 631817864, now seen corresponding path program 10 times [2023-02-15 18:38:09,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:38:09,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405606769] [2023-02-15 18:38:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:38:09,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:38:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:38:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-02-15 18:38:09,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:38:09,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405606769] [2023-02-15 18:38:09,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405606769] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:38:09,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417521243] [2023-02-15 18:38:09,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:38:09,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:38:09,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:38:09,245 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:38:09,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 18:38:09,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:38:09,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:38:09,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 18:38:09,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:38:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-02-15 18:38:09,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:38:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-02-15 18:38:09,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417521243] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:38:09,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:38:09,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-02-15 18:38:09,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980318518] [2023-02-15 18:38:09,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:38:09,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 18:38:09,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:38:09,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 18:38:09,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-02-15 18:38:09,810 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:10,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:38:10,283 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2023-02-15 18:38:10,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 18:38:10,283 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2023-02-15 18:38:10,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:38:10,284 INFO L225 Difference]: With dead ends: 152 [2023-02-15 18:38:10,284 INFO L226 Difference]: Without dead ends: 148 [2023-02-15 18:38:10,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 249 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2023-02-15 18:38:10,285 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 457 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 18:38:10,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 42 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 18:38:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-15 18:38:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2023-02-15 18:38:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2023-02-15 18:38:10,319 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 135 [2023-02-15 18:38:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:38:10,320 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2023-02-15 18:38:10,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2023-02-15 18:38:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-02-15 18:38:10,321 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:38:10,321 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 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 18:38:10,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-15 18:38:10,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 18:38:10,526 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:38:10,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:38:10,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1639815466, now seen corresponding path program 11 times [2023-02-15 18:38:10,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:38:10,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149857185] [2023-02-15 18:38:10,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:38:10,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:38:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:38:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 14 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:38:25,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:38:25,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149857185] [2023-02-15 18:38:25,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149857185] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:38:25,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780630202] [2023-02-15 18:38:25,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:38:25,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:38:25,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:38:25,094 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:38:25,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 18:38:25,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 18:38:25,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:38:25,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 220 conjunts are in the unsatisfiable core [2023-02-15 18:38:25,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:38:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 18:38:29,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:38:32,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:38:32,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 286 [2023-02-15 18:38:33,494 INFO L321 Elim1Store]: treesize reduction 250, result has 7.7 percent of original size [2023-02-15 18:38:33,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 86 treesize of output 35 [2023-02-15 18:38:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 18:38:33,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780630202] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:38:33,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:38:33,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 28, 24] total 125 [2023-02-15 18:38:33,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069947953] [2023-02-15 18:38:33,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:38:33,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2023-02-15 18:38:33,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:38:33,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2023-02-15 18:38:33,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=14786, Unknown=0, NotChecked=0, Total=15500 [2023-02-15 18:38:33,607 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 125 states, 125 states have (on average 2.92) internal successors, (365), 125 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:38:53,852 INFO L93 Difference]: Finished difference Result 590 states and 646 transitions. [2023-02-15 18:38:53,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-02-15 18:38:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.92) internal successors, (365), 125 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2023-02-15 18:38:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:38:53,854 INFO L225 Difference]: With dead ends: 590 [2023-02-15 18:38:53,854 INFO L226 Difference]: Without dead ends: 424 [2023-02-15 18:38:53,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 212 SyntacticMatches, 53 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17258 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=2942, Invalid=38878, Unknown=0, NotChecked=0, Total=41820 [2023-02-15 18:38:53,857 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 419 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 11577 mSolverCounterSat, 2321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 13898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2321 IncrementalHoareTripleChecker+Valid, 11577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-02-15 18:38:53,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 587 Invalid, 13898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2321 Valid, 11577 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-02-15 18:38:53,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-02-15 18:38:53,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 229. [2023-02-15 18:38:53,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0833333333333333) internal successors, (247), 228 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:53,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 247 transitions. [2023-02-15 18:38:53,932 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 247 transitions. Word has length 137 [2023-02-15 18:38:53,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:38:53,932 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 247 transitions. [2023-02-15 18:38:53,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.92) internal successors, (365), 125 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:53,933 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 247 transitions. [2023-02-15 18:38:53,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-02-15 18:38:53,933 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:38:53,933 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 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 18:38:53,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 18:38:54,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 18:38:54,134 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:38:54,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:38:54,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2121356946, now seen corresponding path program 12 times [2023-02-15 18:38:54,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:38:54,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814222557] [2023-02-15 18:38:54,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:38:54,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:38:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:38:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-02-15 18:38:54,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:38:54,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814222557] [2023-02-15 18:38:54,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814222557] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:38:54,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474377156] [2023-02-15 18:38:54,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:38:54,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:38:54,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:38:54,366 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:38:54,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 18:38:54,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 18:38:54,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:38:54,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 18:38:54,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:38:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-02-15 18:38:54,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:38:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-02-15 18:38:54,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474377156] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:38:54,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:38:54,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-02-15 18:38:54,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171540478] [2023-02-15 18:38:54,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:38:54,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 18:38:54,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:38:54,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 18:38:54,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-02-15 18:38:54,849 INFO L87 Difference]: Start difference. First operand 229 states and 247 transitions. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:55,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:38:55,230 INFO L93 Difference]: Finished difference Result 371 states and 407 transitions. [2023-02-15 18:38:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 18:38:55,231 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-02-15 18:38:55,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:38:55,231 INFO L225 Difference]: With dead ends: 371 [2023-02-15 18:38:55,231 INFO L226 Difference]: Without dead ends: 170 [2023-02-15 18:38:55,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 262 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2023-02-15 18:38:55,232 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 691 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:38:55,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 40 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:38:55,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-15 18:38:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2023-02-15 18:38:55,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.069182389937107) internal successors, (170), 159 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:55,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2023-02-15 18:38:55,281 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 141 [2023-02-15 18:38:55,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:38:55,282 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2023-02-15 18:38:55,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:38:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2023-02-15 18:38:55,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-02-15 18:38:55,283 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:38:55,283 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 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 18:38:55,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 18:38:55,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 18:38:55,489 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:38:55,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:38:55,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1284366496, now seen corresponding path program 13 times [2023-02-15 18:38:55,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:38:55,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594578592] [2023-02-15 18:38:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:38:55,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:38:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat