./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-programs/copysome2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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-programs/copysome2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 498a9d01a4c9c1e07ef15169be61a1aa89cf7662222e03da034e67869e2f7c71 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-15 23:48:19,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 23:48:19,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 23:48:19,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 23:48:19,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 23:48:19,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 23:48:19,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 23:48:19,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 23:48:19,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 23:48:19,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 23:48:19,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 23:48:19,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 23:48:19,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 23:48:19,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 23:48:19,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 23:48:19,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 23:48:19,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 23:48:19,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 23:48:19,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 23:48:19,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 23:48:19,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 23:48:19,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 23:48:19,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 23:48:19,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 23:48:19,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 23:48:19,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 23:48:19,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 23:48:19,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 23:48:19,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 23:48:19,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 23:48:19,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 23:48:19,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 23:48:19,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 23:48:19,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 23:48:19,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 23:48:19,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 23:48:19,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 23:48:19,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 23:48:19,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 23:48:19,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 23:48:19,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 23:48:19,868 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 23:48:19,896 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 23:48:19,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 23:48:19,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 23:48:19,897 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 23:48:19,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 23:48:19,898 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 23:48:19,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 23:48:19,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 23:48:19,899 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 23:48:19,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 23:48:19,900 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 23:48:19,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 23:48:19,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 23:48:19,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 23:48:19,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 23:48:19,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 23:48:19,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 23:48:19,901 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 23:48:19,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 23:48:19,902 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 23:48:19,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 23:48:19,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 23:48:19,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 23:48:19,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 23:48:19,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 23:48:19,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 23:48:19,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 23:48:19,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 23:48:19,904 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 23:48:19,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 23:48:19,904 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 23:48:19,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 23:48:19,904 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 23:48:19,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 23:48:19,905 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 23:48:19,905 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 498a9d01a4c9c1e07ef15169be61a1aa89cf7662222e03da034e67869e2f7c71 [2023-02-15 23:48:20,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 23:48:20,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 23:48:20,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 23:48:20,161 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 23:48:20,161 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 23:48:20,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/copysome2-2.i [2023-02-15 23:48:21,194 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 23:48:21,364 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 23:48:21,364 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/copysome2-2.i [2023-02-15 23:48:21,371 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/350d575de/3366e58f70764d9d9df52bf14d55f35f/FLAGf350059b3 [2023-02-15 23:48:21,383 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/350d575de/3366e58f70764d9d9df52bf14d55f35f [2023-02-15 23:48:21,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 23:48:21,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 23:48:21,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 23:48:21,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 23:48:21,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 23:48:21,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:48:21" (1/1) ... [2023-02-15 23:48:21,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b4890a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:48:21, skipping insertion in model container [2023-02-15 23:48:21,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:48:21" (1/1) ... [2023-02-15 23:48:21,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 23:48:21,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 23:48:21,545 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-programs/copysome2-2.i[804,817] [2023-02-15 23:48:21,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:48:21,579 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 23:48:21,593 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-programs/copysome2-2.i[804,817] [2023-02-15 23:48:21,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:48:21,631 INFO L208 MainTranslator]: Completed translation [2023-02-15 23:48:21,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:48:21 WrapperNode [2023-02-15 23:48:21,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 23:48:21,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 23:48:21,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 23:48:21,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 23:48:21,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:48:21" (1/1) ... [2023-02-15 23:48:21,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:48:21" (1/1) ... [2023-02-15 23:48:21,682 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2023-02-15 23:48:21,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 23:48:21,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 23:48:21,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 23:48:21,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 23:48:21,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:48:21" (1/1) ... [2023-02-15 23:48:21,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:48:21" (1/1) ... [2023-02-15 23:48:21,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:48:21" (1/1) ... [2023-02-15 23:48:21,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:48:21" (1/1) ... [2023-02-15 23:48:21,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:48:21" (1/1) ... [2023-02-15 23:48:21,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:48:21" (1/1) ... [2023-02-15 23:48:21,725 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:48:21" (1/1) ... [2023-02-15 23:48:21,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:48:21" (1/1) ... [2023-02-15 23:48:21,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 23:48:21,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 23:48:21,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 23:48:21,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 23:48:21,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:48:21" (1/1) ... [2023-02-15 23:48:21,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 23:48:21,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:48:21,765 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 23:48:21,767 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 23:48:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 23:48:21,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 23:48:21,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 23:48:21,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 23:48:21,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 23:48:21,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 23:48:21,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 23:48:21,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 23:48:21,867 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 23:48:21,869 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 23:48:21,998 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 23:48:22,003 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 23:48:22,004 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-15 23:48:22,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:48:22 BoogieIcfgContainer [2023-02-15 23:48:22,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 23:48:22,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 23:48:22,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 23:48:22,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 23:48:22,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:48:21" (1/3) ... [2023-02-15 23:48:22,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15098471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:48:22, skipping insertion in model container [2023-02-15 23:48:22,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:48:21" (2/3) ... [2023-02-15 23:48:22,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15098471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:48:22, skipping insertion in model container [2023-02-15 23:48:22,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:48:22" (3/3) ... [2023-02-15 23:48:22,024 INFO L112 eAbstractionObserver]: Analyzing ICFG copysome2-2.i [2023-02-15 23:48:22,054 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 23:48:22,055 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 23:48:22,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 23:48:22,123 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;@1d82f09f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 23:48:22,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 23:48:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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 23:48:22,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 23:48:22,134 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:48:22,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:48:22,136 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:48:22,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:48:22,142 INFO L85 PathProgramCache]: Analyzing trace with hash 551047633, now seen corresponding path program 1 times [2023-02-15 23:48:22,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:48:22,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216255659] [2023-02-15 23:48:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:48:22,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:48:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:48:22,376 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 23:48:22,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:48:22,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216255659] [2023-02-15 23:48:22,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216255659] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:48:22,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 23:48:22,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 23:48:22,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703627476] [2023-02-15 23:48:22,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:48:22,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 23:48:22,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:48:22,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 23:48:22,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 23:48:22,422 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:48:22,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:48:22,477 INFO L93 Difference]: Finished difference Result 50 states and 76 transitions. [2023-02-15 23:48:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 23:48:22,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 23:48:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:48:22,486 INFO L225 Difference]: With dead ends: 50 [2023-02-15 23:48:22,487 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 23:48:22,489 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 23:48:22,492 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:48:22,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:48:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 23:48:22,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2023-02-15 23:48:22,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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 23:48:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-02-15 23:48:22,543 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2023-02-15 23:48:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:48:22,544 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-02-15 23:48:22,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:48:22,544 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-02-15 23:48:22,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 23:48:22,546 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:48:22,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:48:22,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 23:48:22,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:48:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:48:22,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1141073570, now seen corresponding path program 1 times [2023-02-15 23:48:22,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:48:22,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646838334] [2023-02-15 23:48:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:48:22,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:48:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:48:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 23:48:22,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:48:22,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646838334] [2023-02-15 23:48:22,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646838334] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:48:22,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231422737] [2023-02-15 23:48:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:48:22,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:48:22,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:48:22,744 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 23:48:22,746 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 23:48:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:48:22,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 23:48:22,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:48:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 23:48:22,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:48:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 23:48:22,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231422737] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:48:22,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:48:22,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 23:48:22,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289048809] [2023-02-15 23:48:22,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:48:22,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 23:48:22,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:48:22,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 23:48:22,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 23:48:22,949 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 23:48:23,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:48:23,061 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2023-02-15 23:48:23,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 23:48:23,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 19 [2023-02-15 23:48:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:48:23,065 INFO L225 Difference]: With dead ends: 63 [2023-02-15 23:48:23,067 INFO L226 Difference]: Without dead ends: 46 [2023-02-15 23:48:23,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 23:48:23,068 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:48:23,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 30 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:48:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-15 23:48:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-02-15 23:48:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 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 23:48:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2023-02-15 23:48:23,075 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 19 [2023-02-15 23:48:23,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:48:23,076 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2023-02-15 23:48:23,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 23:48:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2023-02-15 23:48:23,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 23:48:23,077 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:48:23,077 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:48:23,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 23:48:23,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:48:23,281 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:48:23,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:48:23,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1011418317, now seen corresponding path program 2 times [2023-02-15 23:48:23,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:48:23,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98981187] [2023-02-15 23:48:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:48:23,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:48:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:48:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-02-15 23:48:23,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:48:23,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98981187] [2023-02-15 23:48:23,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98981187] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:48:23,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 23:48:23,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 23:48:23,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213579490] [2023-02-15 23:48:23,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:48:23,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 23:48:23,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:48:23,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 23:48:23,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 23:48:23,536 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 23:48:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:48:23,582 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2023-02-15 23:48:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 23:48:23,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 43 [2023-02-15 23:48:23,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:48:23,585 INFO L225 Difference]: With dead ends: 78 [2023-02-15 23:48:23,586 INFO L226 Difference]: Without dead ends: 46 [2023-02-15 23:48:23,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 23:48:23,587 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:48:23,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 23 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:48:23,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-15 23:48:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-02-15 23:48:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 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 23:48:23,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2023-02-15 23:48:23,601 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 43 [2023-02-15 23:48:23,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:48:23,602 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2023-02-15 23:48:23,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 23:48:23,602 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2023-02-15 23:48:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 23:48:23,604 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:48:23,605 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:48:23,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 23:48:23,605 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:48:23,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:48:23,606 INFO L85 PathProgramCache]: Analyzing trace with hash 9650037, now seen corresponding path program 1 times [2023-02-15 23:48:23,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:48:23,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818693645] [2023-02-15 23:48:23,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:48:23,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:48:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:48:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-02-15 23:48:23,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:48:23,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818693645] [2023-02-15 23:48:23,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818693645] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:48:23,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396362528] [2023-02-15 23:48:23,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:48:23,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:48:23,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:48:23,817 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 23:48:23,840 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 23:48:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:48:23,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 23:48:23,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:48:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 23:48:23,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:48:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 23:48:24,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396362528] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:48:24,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:48:24,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-02-15 23:48:24,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067144966] [2023-02-15 23:48:24,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:48:24,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 23:48:24,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:48:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 23:48:24,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2023-02-15 23:48:24,052 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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 23:48:24,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:48:24,361 INFO L93 Difference]: Finished difference Result 145 states and 202 transitions. [2023-02-15 23:48:24,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 23:48:24,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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 43 [2023-02-15 23:48:24,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:48:24,368 INFO L225 Difference]: With dead ends: 145 [2023-02-15 23:48:24,368 INFO L226 Difference]: Without dead ends: 110 [2023-02-15 23:48:24,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2023-02-15 23:48:24,371 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 117 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 23:48:24,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 63 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 23:48:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-15 23:48:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-02-15 23:48:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.238532110091743) internal successors, (135), 109 states have internal predecessors, (135), 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 23:48:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 135 transitions. [2023-02-15 23:48:24,399 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 135 transitions. Word has length 43 [2023-02-15 23:48:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:48:24,399 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 135 transitions. [2023-02-15 23:48:24,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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 23:48:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 135 transitions. [2023-02-15 23:48:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-15 23:48:24,402 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:48:24,403 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:48:24,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 23:48:24,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-15 23:48:24,609 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:48:24,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:48:24,609 INFO L85 PathProgramCache]: Analyzing trace with hash 762574501, now seen corresponding path program 2 times [2023-02-15 23:48:24,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:48:24,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696912434] [2023-02-15 23:48:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:48:24,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:48:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:48:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-02-15 23:48:25,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:48:25,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696912434] [2023-02-15 23:48:25,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696912434] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:48:25,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192687877] [2023-02-15 23:48:25,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:48:25,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:48:25,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:48:25,179 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 23:48:25,182 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 23:48:25,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:48:25,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:48:25,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 23:48:25,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:48:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-02-15 23:48:25,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:48:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-02-15 23:48:25,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192687877] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:48:25,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:48:25,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-02-15 23:48:25,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033858133] [2023-02-15 23:48:25,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:48:25,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 23:48:25,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:48:25,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 23:48:25,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2023-02-15 23:48:25,737 INFO L87 Difference]: Start difference. First operand 110 states and 135 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 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 23:48:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:48:26,217 INFO L93 Difference]: Finished difference Result 895 states and 1184 transitions. [2023-02-15 23:48:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 23:48:26,218 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 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 107 [2023-02-15 23:48:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:48:26,222 INFO L225 Difference]: With dead ends: 895 [2023-02-15 23:48:26,222 INFO L226 Difference]: Without dead ends: 812 [2023-02-15 23:48:26,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2023-02-15 23:48:26,224 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 422 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 23:48:26,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 54 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 23:48:26,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2023-02-15 23:48:26,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 222. [2023-02-15 23:48:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.244343891402715) internal successors, (275), 221 states have internal predecessors, (275), 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 23:48:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 275 transitions. [2023-02-15 23:48:26,250 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 275 transitions. Word has length 107 [2023-02-15 23:48:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:48:26,250 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 275 transitions. [2023-02-15 23:48:26,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 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 23:48:26,251 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 275 transitions. [2023-02-15 23:48:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-02-15 23:48:26,253 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:48:26,254 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 19, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:48:26,263 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 23:48:26,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:48:26,461 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:48:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:48:26,462 INFO L85 PathProgramCache]: Analyzing trace with hash 518233129, now seen corresponding path program 3 times [2023-02-15 23:48:26,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:48:26,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85815889] [2023-02-15 23:48:26,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:48:26,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:48:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:48:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2002 trivial. 0 not checked. [2023-02-15 23:48:27,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:48:27,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85815889] [2023-02-15 23:48:27,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85815889] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:48:27,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005418104] [2023-02-15 23:48:27,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 23:48:27,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:48:27,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:48:27,949 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 23:48:27,972 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 23:48:28,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 23:48:28,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:48:28,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 23:48:28,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:48:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 2553 trivial. 0 not checked. [2023-02-15 23:48:29,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:48:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 2553 trivial. 0 not checked. [2023-02-15 23:48:29,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005418104] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:48:29,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:48:29,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 5, 5] total 35 [2023-02-15 23:48:29,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943389266] [2023-02-15 23:48:29,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:48:29,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 23:48:29,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:48:29,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 23:48:29,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=709, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 23:48:29,315 INFO L87 Difference]: Start difference. First operand 222 states and 275 transitions. Second operand has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 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 23:48:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:48:30,337 INFO L93 Difference]: Finished difference Result 470 states and 602 transitions. [2023-02-15 23:48:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 23:48:30,337 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 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 219 [2023-02-15 23:48:30,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:48:30,339 INFO L225 Difference]: With dead ends: 470 [2023-02-15 23:48:30,339 INFO L226 Difference]: Without dead ends: 303 [2023-02-15 23:48:30,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1434, Invalid=2472, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 23:48:30,345 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 652 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 23:48:30,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 76 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 23:48:30,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-02-15 23:48:30,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 278. [2023-02-15 23:48:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.0722021660649819) internal successors, (297), 277 states have internal predecessors, (297), 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 23:48:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 297 transitions. [2023-02-15 23:48:30,368 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 297 transitions. Word has length 219 [2023-02-15 23:48:30,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:48:30,368 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 297 transitions. [2023-02-15 23:48:30,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 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 23:48:30,368 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 297 transitions. [2023-02-15 23:48:30,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-02-15 23:48:30,376 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:48:30,376 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:48:30,384 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 23:48:30,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:48:30,585 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:48:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:48:30,585 INFO L85 PathProgramCache]: Analyzing trace with hash 87947340, now seen corresponding path program 1 times [2023-02-15 23:48:30,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:48:30,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594308635] [2023-02-15 23:48:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:48:30,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:48:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:48:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2160 trivial. 0 not checked. [2023-02-15 23:48:32,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:48:32,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594308635] [2023-02-15 23:48:32,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594308635] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:48:32,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129093007] [2023-02-15 23:48:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:48:32,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:48:32,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:48:32,062 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 23:48:32,065 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 23:48:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:48:32,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-15 23:48:32,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:48:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2160 trivial. 0 not checked. [2023-02-15 23:48:32,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:48:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2160 trivial. 0 not checked. [2023-02-15 23:48:33,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129093007] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:48:33,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:48:33,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 59 [2023-02-15 23:48:33,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472785357] [2023-02-15 23:48:33,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:48:33,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-15 23:48:33,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:48:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-15 23:48:33,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 23:48:33,463 INFO L87 Difference]: Start difference. First operand 278 states and 297 transitions. Second operand has 59 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 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 23:48:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:48:34,412 INFO L93 Difference]: Finished difference Result 1511 states and 1913 transitions. [2023-02-15 23:48:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-15 23:48:34,413 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 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 227 [2023-02-15 23:48:34,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:48:34,420 INFO L225 Difference]: With dead ends: 1511 [2023-02-15 23:48:34,421 INFO L226 Difference]: Without dead ends: 1290 [2023-02-15 23:48:34,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 23:48:34,423 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 840 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 23:48:34,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 62 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 23:48:34,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2023-02-15 23:48:34,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 462. [2023-02-15 23:48:34,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.1258134490238612) internal successors, (519), 461 states have internal predecessors, (519), 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 23:48:34,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 519 transitions. [2023-02-15 23:48:34,466 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 519 transitions. Word has length 227 [2023-02-15 23:48:34,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:48:34,466 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 519 transitions. [2023-02-15 23:48:34,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 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 23:48:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 519 transitions. [2023-02-15 23:48:34,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-02-15 23:48:34,471 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:48:34,471 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 35, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:48:34,484 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 23:48:34,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:48:34,680 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:48:34,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:48:34,680 INFO L85 PathProgramCache]: Analyzing trace with hash 533193997, now seen corresponding path program 4 times [2023-02-15 23:48:34,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:48:34,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606032707] [2023-02-15 23:48:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:48:34,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:48:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:48:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12488 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 9352 trivial. 0 not checked. [2023-02-15 23:48:39,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:48:39,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606032707] [2023-02-15 23:48:39,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606032707] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:48:39,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280099956] [2023-02-15 23:48:39,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 23:48:39,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:48:39,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:48:39,576 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 23:48:39,578 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 23:48:40,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 23:48:40,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:48:40,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 23:48:40,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:48:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12488 backedges. 2450 proven. 0 refuted. 0 times theorem prover too weak. 10038 trivial. 0 not checked. [2023-02-15 23:48:40,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 23:48:40,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280099956] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:48:40,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 23:48:40,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [59] total 61 [2023-02-15 23:48:40,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652229992] [2023-02-15 23:48:40,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:48:40,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 23:48:40,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:48:40,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 23:48:40,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2023-02-15 23:48:40,190 INFO L87 Difference]: Start difference. First operand 462 states and 519 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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 23:48:40,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:48:40,254 INFO L93 Difference]: Finished difference Result 924 states and 1089 transitions. [2023-02-15 23:48:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 23:48:40,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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 459 [2023-02-15 23:48:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:48:40,257 INFO L225 Difference]: With dead ends: 924 [2023-02-15 23:48:40,258 INFO L226 Difference]: Without dead ends: 670 [2023-02-15 23:48:40,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2023-02-15 23:48:40,260 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:48:40,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 32 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:48:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2023-02-15 23:48:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 622. [2023-02-15 23:48:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 1.0966183574879227) internal successors, (681), 621 states have internal predecessors, (681), 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 23:48:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 681 transitions. [2023-02-15 23:48:40,333 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 681 transitions. Word has length 459 [2023-02-15 23:48:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:48:40,334 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 681 transitions. [2023-02-15 23:48:40,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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 23:48:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 681 transitions. [2023-02-15 23:48:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-02-15 23:48:40,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:48:40,341 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:48:40,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 23:48:40,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:48:40,550 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:48:40,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:48:40,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1635541619, now seen corresponding path program 5 times [2023-02-15 23:48:40,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:48:40,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749621085] [2023-02-15 23:48:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:48:40,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:48:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:48:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12488 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 9352 trivial. 0 not checked. [2023-02-15 23:48:44,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:48:44,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749621085] [2023-02-15 23:48:44,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749621085] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:48:44,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832616724] [2023-02-15 23:48:44,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 23:48:44,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:48:44,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:48:44,465 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 23:48:44,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process