./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/ldv-regression/rule60_list2.c_1.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 5dc0e184171498e703ccf08545f4f79d3c1c383c8c0fc13a1f35990befb669a4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 05:57:54,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 05:57:54,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 05:57:54,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 05:57:54,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 05:57:54,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 05:57:54,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 05:57:54,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 05:57:54,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 05:57:54,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 05:57:54,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 05:57:54,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 05:57:54,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 05:57:54,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 05:57:54,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 05:57:54,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 05:57:54,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 05:57:54,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 05:57:54,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 05:57:54,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 05:57:54,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 05:57:54,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 05:57:54,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 05:57:54,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 05:57:54,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 05:57:54,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 05:57:54,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 05:57:54,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 05:57:54,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 05:57:54,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 05:57:54,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 05:57:54,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 05:57:54,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 05:57:54,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 05:57:54,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 05:57:54,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 05:57:54,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 05:57:54,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 05:57:54,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 05:57:54,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 05:57:54,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 05:57:54,858 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 05:57:54,884 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 05:57:54,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 05:57:54,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 05:57:54,885 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 05:57:54,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 05:57:54,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 05:57:54,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 05:57:54,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 05:57:54,886 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 05:57:54,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 05:57:54,887 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 05:57:54,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 05:57:54,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 05:57:54,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 05:57:54,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 05:57:54,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 05:57:54,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 05:57:54,888 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 05:57:54,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 05:57:54,889 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 05:57:54,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 05:57:54,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 05:57:54,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 05:57:54,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 05:57:54,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 05:57:54,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 05:57:54,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 05:57:54,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 05:57:54,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 05:57:54,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 05:57:54,890 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 05:57:54,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 05:57:54,891 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 05:57:54,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 05:57:54,891 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 05:57:54,891 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dc0e184171498e703ccf08545f4f79d3c1c383c8c0fc13a1f35990befb669a4 [2023-02-17 05:57:55,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 05:57:55,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 05:57:55,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 05:57:55,108 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 05:57:55,108 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 05:57:55,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2023-02-17 05:57:56,014 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 05:57:56,210 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 05:57:56,215 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2023-02-17 05:57:56,233 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fbf2ecbe/6f6d5dc676dc4df9be2958f184c9c2b3/FLAG8b981bc74 [2023-02-17 05:57:56,246 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fbf2ecbe/6f6d5dc676dc4df9be2958f184c9c2b3 [2023-02-17 05:57:56,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 05:57:56,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 05:57:56,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 05:57:56,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 05:57:56,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 05:57:56,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 05:57:56" (1/1) ... [2023-02-17 05:57:56,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49d6a11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:57:56, skipping insertion in model container [2023-02-17 05:57:56,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 05:57:56" (1/1) ... [2023-02-17 05:57:56,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 05:57:56,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 05:57:56,369 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/ldv-regression/rule60_list2.c_1.i[296,309] [2023-02-17 05:57:56,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 05:57:56,485 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 05:57:56,493 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/ldv-regression/rule60_list2.c_1.i[296,309] [2023-02-17 05:57:56,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 05:57:56,529 INFO L208 MainTranslator]: Completed translation [2023-02-17 05:57:56,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:57:56 WrapperNode [2023-02-17 05:57:56,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 05:57:56,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 05:57:56,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 05:57:56,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 05:57:56,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:57:56" (1/1) ... [2023-02-17 05:57:56,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:57:56" (1/1) ... [2023-02-17 05:57:56,554 INFO L138 Inliner]: procedures = 126, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-02-17 05:57:56,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 05:57:56,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 05:57:56,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 05:57:56,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 05:57:56,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:57:56" (1/1) ... [2023-02-17 05:57:56,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:57:56" (1/1) ... [2023-02-17 05:57:56,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:57:56" (1/1) ... [2023-02-17 05:57:56,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:57:56" (1/1) ... [2023-02-17 05:57:56,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:57:56" (1/1) ... [2023-02-17 05:57:56,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:57:56" (1/1) ... [2023-02-17 05:57:56,567 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:57:56" (1/1) ... [2023-02-17 05:57:56,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:57:56" (1/1) ... [2023-02-17 05:57:56,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 05:57:56,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 05:57:56,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 05:57:56,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 05:57:56,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:57:56" (1/1) ... [2023-02-17 05:57:56,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 05:57:56,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:57:56,589 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) [2023-02-17 05:57:56,594 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 [2023-02-17 05:57:56,614 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2023-02-17 05:57:56,614 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2023-02-17 05:57:56,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 05:57:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-02-17 05:57:56,615 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-02-17 05:57:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 05:57:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2023-02-17 05:57:56,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2023-02-17 05:57:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 05:57:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 05:57:56,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 05:57:56,727 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 05:57:56,728 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 05:57:56,878 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 05:57:56,883 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 05:57:56,883 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-17 05:57:56,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 05:57:56 BoogieIcfgContainer [2023-02-17 05:57:56,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 05:57:56,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 05:57:56,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 05:57:56,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 05:57:56,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 05:57:56" (1/3) ... [2023-02-17 05:57:56,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@637b5ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 05:57:56, skipping insertion in model container [2023-02-17 05:57:56,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:57:56" (2/3) ... [2023-02-17 05:57:56,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@637b5ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 05:57:56, skipping insertion in model container [2023-02-17 05:57:56,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 05:57:56" (3/3) ... [2023-02-17 05:57:56,890 INFO L112 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2023-02-17 05:57:56,903 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 05:57:56,903 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 05:57:56,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 05:57:56,951 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;@20c1de06, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 05:57:56,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 05:57:56,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 05:57:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 05:57:56,957 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:57:56,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:57:56,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:57:56,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:57:56,961 INFO L85 PathProgramCache]: Analyzing trace with hash 484842023, now seen corresponding path program 1 times [2023-02-17 05:57:56,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:57:56,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778817085] [2023-02-17 05:57:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:57:56,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:57:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 05:57:57,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:57:57,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778817085] [2023-02-17 05:57:57,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778817085] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:57:57,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:57:57,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 05:57:57,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051001868] [2023-02-17 05:57:57,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:57:57,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 05:57:57,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:57:57,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 05:57:57,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 05:57:57,233 INFO L87 Difference]: Start difference. First operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 05:57:57,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:57:57,285 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2023-02-17 05:57:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 05:57:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-17 05:57:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:57:57,293 INFO L225 Difference]: With dead ends: 68 [2023-02-17 05:57:57,293 INFO L226 Difference]: Without dead ends: 30 [2023-02-17 05:57:57,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 05:57:57,298 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 05:57:57,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 99 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 05:57:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-17 05:57:57,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-17 05:57:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 05:57:57,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-02-17 05:57:57,322 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 7 [2023-02-17 05:57:57,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:57:57,323 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-02-17 05:57:57,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 05:57:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-02-17 05:57:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 05:57:57,324 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:57:57,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:57:57,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 05:57:57,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:57:57,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:57:57,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1134155612, now seen corresponding path program 1 times [2023-02-17 05:57:57,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:57:57,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080684181] [2023-02-17 05:57:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:57:57,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:57:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:57,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:57:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:57,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 05:57:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:57:57,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:57:57,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080684181] [2023-02-17 05:57:57,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080684181] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:57:57,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558178866] [2023-02-17 05:57:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:57:57,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:57:57,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:57:57,570 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) [2023-02-17 05:57:57,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 05:57:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:57,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 05:57:57,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:57:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:57:57,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:57:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:57:57,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558178866] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:57:57,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:57:57,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2023-02-17 05:57:57,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67693999] [2023-02-17 05:57:57,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:57:57,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 05:57:57,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:57:57,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 05:57:57,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 05:57:57,738 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 05:57:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:57:57,839 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2023-02-17 05:57:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 05:57:57,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-02-17 05:57:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:57:57,841 INFO L225 Difference]: With dead ends: 53 [2023-02-17 05:57:57,842 INFO L226 Difference]: Without dead ends: 33 [2023-02-17 05:57:57,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 05:57:57,844 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:57:57,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 113 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:57:57,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-17 05:57:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-17 05:57:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-17 05:57:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-02-17 05:57:57,851 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 26 [2023-02-17 05:57:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:57:57,852 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-02-17 05:57:57,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 05:57:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-02-17 05:57:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 05:57:57,854 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:57:57,854 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:57:57,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 05:57:58,059 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 [2023-02-17 05:57:58,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:57:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:57:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1951804062, now seen corresponding path program 1 times [2023-02-17 05:57:58,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:57:58,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60443294] [2023-02-17 05:57:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:57:58,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:57:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:58,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:57:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:58,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 05:57:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:57:58,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:57:58,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60443294] [2023-02-17 05:57:58,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60443294] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:57:58,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:57:58,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 05:57:58,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349199402] [2023-02-17 05:57:58,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:57:58,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 05:57:58,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:57:58,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 05:57:58,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 05:57:58,179 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 05:57:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:57:58,250 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2023-02-17 05:57:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 05:57:58,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-02-17 05:57:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:57:58,253 INFO L225 Difference]: With dead ends: 51 [2023-02-17 05:57:58,253 INFO L226 Difference]: Without dead ends: 30 [2023-02-17 05:57:58,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 05:57:58,255 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:57:58,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 109 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:57:58,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-17 05:57:58,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-17 05:57:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 05:57:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-02-17 05:57:58,270 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 26 [2023-02-17 05:57:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:57:58,271 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-02-17 05:57:58,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 05:57:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-02-17 05:57:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 05:57:58,272 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:57:58,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:57:58,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 05:57:58,272 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:57:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:57:58,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1250739484, now seen corresponding path program 1 times [2023-02-17 05:57:58,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:57:58,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952388119] [2023-02-17 05:57:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:57:58,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:57:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:58,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:57:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:58,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 05:57:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:57:58,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:57:58,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952388119] [2023-02-17 05:57:58,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952388119] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:57:58,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709793555] [2023-02-17 05:57:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:57:58,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:57:58,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:57:58,507 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) [2023-02-17 05:57:58,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 05:57:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:58,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 05:57:58,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:57:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:57:58,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 05:57:58,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709793555] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:57:58,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 05:57:58,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 22 [2023-02-17 05:57:58,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402797297] [2023-02-17 05:57:58,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:57:58,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 05:57:58,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:57:58,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 05:57:58,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2023-02-17 05:57:58,707 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 05:57:58,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:57:58,911 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2023-02-17 05:57:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 05:57:58,911 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-02-17 05:57:58,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:57:58,914 INFO L225 Difference]: With dead ends: 57 [2023-02-17 05:57:58,914 INFO L226 Difference]: Without dead ends: 54 [2023-02-17 05:57:58,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2023-02-17 05:57:58,916 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 72 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:57:58,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 130 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:57:58,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-17 05:57:58,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-02-17 05:57:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2023-02-17 05:57:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2023-02-17 05:57:58,931 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 26 [2023-02-17 05:57:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:57:58,933 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2023-02-17 05:57:58,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 05:57:58,933 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2023-02-17 05:57:58,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 05:57:58,934 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:57:58,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:57:58,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 05:57:59,139 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 [2023-02-17 05:57:59,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:57:59,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:57:59,141 INFO L85 PathProgramCache]: Analyzing trace with hash 937918941, now seen corresponding path program 1 times [2023-02-17 05:57:59,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:57:59,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393489940] [2023-02-17 05:57:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:57:59,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:57:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:59,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:57:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:59,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 05:57:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:59,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-17 05:57:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 05:57:59,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:57:59,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393489940] [2023-02-17 05:57:59,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393489940] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:57:59,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947936748] [2023-02-17 05:57:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:57:59,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:57:59,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:57:59,375 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) [2023-02-17 05:57:59,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 05:57:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:57:59,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 05:57:59,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:57:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 05:57:59,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:57:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 05:57:59,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947936748] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:57:59,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:57:59,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 26 [2023-02-17 05:57:59,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118091373] [2023-02-17 05:57:59,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:57:59,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-17 05:57:59,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:57:59,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-17 05:57:59,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2023-02-17 05:57:59,773 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 05:58:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:58:00,161 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2023-02-17 05:58:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 05:58:00,162 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2023-02-17 05:58:00,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:58:00,162 INFO L225 Difference]: With dead ends: 64 [2023-02-17 05:58:00,162 INFO L226 Difference]: Without dead ends: 60 [2023-02-17 05:58:00,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 43 SyntacticMatches, 19 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2023-02-17 05:58:00,163 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 05:58:00,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 74 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 05:58:00,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-17 05:58:00,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-02-17 05:58:00,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 44 states have internal predecessors, (51), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2023-02-17 05:58:00,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2023-02-17 05:58:00,168 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 33 [2023-02-17 05:58:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:58:00,169 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2023-02-17 05:58:00,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 05:58:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2023-02-17 05:58:00,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 05:58:00,169 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:58:00,169 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:58:00,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 05:58:00,376 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 [2023-02-17 05:58:00,376 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:58:00,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:58:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash 128572315, now seen corresponding path program 1 times [2023-02-17 05:58:00,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:58:00,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002423229] [2023-02-17 05:58:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:58:00,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:58:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:00,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:58:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:00,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 05:58:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:00,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-17 05:58:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 05:58:00,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:58:00,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002423229] [2023-02-17 05:58:00,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002423229] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:58:00,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416083455] [2023-02-17 05:58:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:58:00,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:58:00,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:58:00,522 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) [2023-02-17 05:58:00,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 05:58:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:00,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-17 05:58:00,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:58:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 05:58:00,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:58:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 05:58:00,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416083455] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:58:00,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:58:00,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 35 [2023-02-17 05:58:00,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138630140] [2023-02-17 05:58:00,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:58:00,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-17 05:58:00,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:58:00,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-17 05:58:00,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2023-02-17 05:58:00,864 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 27 states have internal predecessors, (63), 8 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2023-02-17 05:58:01,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:58:01,277 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2023-02-17 05:58:01,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 05:58:01,277 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 27 states have internal predecessors, (63), 8 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 33 [2023-02-17 05:58:01,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:58:01,278 INFO L225 Difference]: With dead ends: 78 [2023-02-17 05:58:01,278 INFO L226 Difference]: Without dead ends: 68 [2023-02-17 05:58:01,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=307, Invalid=1763, Unknown=0, NotChecked=0, Total=2070 [2023-02-17 05:58:01,279 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 126 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 05:58:01,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 133 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 05:58:01,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-17 05:58:01,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2023-02-17 05:58:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-17 05:58:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2023-02-17 05:58:01,284 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 33 [2023-02-17 05:58:01,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:58:01,285 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2023-02-17 05:58:01,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 27 states have internal predecessors, (63), 8 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2023-02-17 05:58:01,285 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2023-02-17 05:58:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 05:58:01,285 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:58:01,286 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:58:01,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-17 05:58:01,486 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 [2023-02-17 05:58:01,486 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:58:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:58:01,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1975182920, now seen corresponding path program 1 times [2023-02-17 05:58:01,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:58:01,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558005101] [2023-02-17 05:58:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:58:01,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:58:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:01,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:58:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:01,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 05:58:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:01,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-17 05:58:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:01,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-17 05:58:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 05:58:01,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:58:01,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558005101] [2023-02-17 05:58:01,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558005101] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:58:01,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634166723] [2023-02-17 05:58:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:58:01,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:58:01,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:58:01,665 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) [2023-02-17 05:58:01,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 05:58:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:01,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 05:58:01,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:58:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 05:58:01,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:58:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 05:58:01,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634166723] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:58:01,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:58:01,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 25 [2023-02-17 05:58:01,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646425913] [2023-02-17 05:58:01,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:58:01,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 05:58:01,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:58:01,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 05:58:01,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2023-02-17 05:58:01,933 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 05:58:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:58:02,323 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2023-02-17 05:58:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 05:58:02,323 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2023-02-17 05:58:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:58:02,324 INFO L225 Difference]: With dead ends: 76 [2023-02-17 05:58:02,324 INFO L226 Difference]: Without dead ends: 62 [2023-02-17 05:58:02,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 70 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2023-02-17 05:58:02,325 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 66 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 05:58:02,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 110 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 05:58:02,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-17 05:58:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2023-02-17 05:58:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.131578947368421) internal successors, (43), 39 states have internal predecessors, (43), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-17 05:58:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2023-02-17 05:58:02,330 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 43 [2023-02-17 05:58:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:58:02,330 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2023-02-17 05:58:02,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 05:58:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2023-02-17 05:58:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 05:58:02,331 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:58:02,331 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:58:02,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 05:58:02,533 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 [2023-02-17 05:58:02,533 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:58:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:58:02,533 INFO L85 PathProgramCache]: Analyzing trace with hash -544777014, now seen corresponding path program 1 times [2023-02-17 05:58:02,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:58:02,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464820824] [2023-02-17 05:58:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:58:02,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:58:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:02,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:58:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:02,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 05:58:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:02,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-17 05:58:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:02,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-17 05:58:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 05:58:02,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:58:02,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464820824] [2023-02-17 05:58:02,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464820824] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:58:02,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445121602] [2023-02-17 05:58:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:58:02,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:58:02,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:58:02,706 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) [2023-02-17 05:58:02,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 05:58:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:02,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 05:58:02,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:58:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 05:58:02,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:58:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 05:58:02,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445121602] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:58:02,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:58:02,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 26 [2023-02-17 05:58:02,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998248109] [2023-02-17 05:58:02,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:58:02,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-17 05:58:02,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:58:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-17 05:58:02,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2023-02-17 05:58:02,996 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 26 states, 25 states have (on average 1.96) internal successors, (49), 21 states have internal predecessors, (49), 5 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 05:58:03,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:58:03,327 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-02-17 05:58:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 05:58:03,327 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 21 states have internal predecessors, (49), 5 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2023-02-17 05:58:03,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:58:03,328 INFO L225 Difference]: With dead ends: 65 [2023-02-17 05:58:03,328 INFO L226 Difference]: Without dead ends: 62 [2023-02-17 05:58:03,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2023-02-17 05:58:03,330 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 64 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 05:58:03,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 117 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 05:58:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-17 05:58:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2023-02-17 05:58:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-02-17 05:58:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2023-02-17 05:58:03,334 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 43 [2023-02-17 05:58:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:58:03,335 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2023-02-17 05:58:03,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 21 states have internal predecessors, (49), 5 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 05:58:03,335 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2023-02-17 05:58:03,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 05:58:03,335 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:58:03,335 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:58:03,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-17 05:58:03,540 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 [2023-02-17 05:58:03,541 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:58:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:58:03,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1618719798, now seen corresponding path program 1 times [2023-02-17 05:58:03,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:58:03,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250681530] [2023-02-17 05:58:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:58:03,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:58:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:03,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:58:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:03,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 05:58:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:03,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-17 05:58:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:03,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-17 05:58:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 05:58:03,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:58:03,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250681530] [2023-02-17 05:58:03,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250681530] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:58:03,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599185029] [2023-02-17 05:58:03,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:58:03,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:58:03,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:58:03,677 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) [2023-02-17 05:58:03,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 05:58:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:03,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 05:58:03,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:58:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 05:58:03,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 05:58:03,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599185029] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:58:03,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 05:58:03,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 24 [2023-02-17 05:58:03,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549216871] [2023-02-17 05:58:03,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:58:03,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 05:58:03,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:58:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 05:58:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2023-02-17 05:58:03,848 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 05:58:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:58:04,023 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2023-02-17 05:58:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 05:58:04,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2023-02-17 05:58:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:58:04,025 INFO L225 Difference]: With dead ends: 74 [2023-02-17 05:58:04,025 INFO L226 Difference]: Without dead ends: 67 [2023-02-17 05:58:04,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 05:58:04,025 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:58:04,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 106 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:58:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-17 05:58:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2023-02-17 05:58:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-17 05:58:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2023-02-17 05:58:04,030 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 43 [2023-02-17 05:58:04,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:58:04,030 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2023-02-17 05:58:04,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 05:58:04,030 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2023-02-17 05:58:04,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 05:58:04,031 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:58:04,031 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:58:04,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 05:58:04,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:58:04,238 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:58:04,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:58:04,238 INFO L85 PathProgramCache]: Analyzing trace with hash 156287564, now seen corresponding path program 1 times [2023-02-17 05:58:04,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:58:04,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034239716] [2023-02-17 05:58:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:58:04,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:58:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:04,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:58:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:04,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 05:58:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:04,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-17 05:58:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:04,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-17 05:58:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 05:58:04,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:58:04,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034239716] [2023-02-17 05:58:04,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034239716] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:58:04,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212734648] [2023-02-17 05:58:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:58:04,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:58:04,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:58:04,475 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 05:58:04,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 05:58:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:58:04,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-17 05:58:04,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:58:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 05:58:04,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:58:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 05:58:04,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212734648] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:58:04,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:58:04,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7, 7] total 24 [2023-02-17 05:58:04,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718385838] [2023-02-17 05:58:04,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:58:04,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 05:58:04,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:58:04,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 05:58:04,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2023-02-17 05:58:04,608 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 19 states have internal predecessors, (56), 8 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-17 05:58:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:58:05,013 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2023-02-17 05:58:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 05:58:05,014 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 19 states have internal predecessors, (56), 8 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 43 [2023-02-17 05:58:05,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:58:05,014 INFO L225 Difference]: With dead ends: 76 [2023-02-17 05:58:05,014 INFO L226 Difference]: Without dead ends: 69 [2023-02-17 05:58:05,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 05:58:05,015 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 05:58:05,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 109 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 05:58:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-17 05:58:05,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2023-02-17 05:58:05,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-17 05:58:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-02-17 05:58:05,020 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 43 [2023-02-17 05:58:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:58:05,021 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-02-17 05:58:05,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 19 states have internal predecessors, (56), 8 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-17 05:58:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-02-17 05:58:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 05:58:05,021 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:58:05,022 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:58:05,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 05:58:05,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-17 05:58:05,227 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:58:05,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:58:05,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2126992523, now seen corresponding path program 1 times [2023-02-17 05:58:05,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:58:05,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106893536] [2023-02-17 05:58:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:58:05,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:58:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-17 05:58:05,235 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-17 05:58:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-17 05:58:05,266 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-17 05:58:05,266 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-17 05:58:05,267 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-17 05:58:05,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 05:58:05,270 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:58:05,273 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-17 05:58:05,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.02 05:58:05 BoogieIcfgContainer [2023-02-17 05:58:05,327 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-17 05:58:05,328 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-17 05:58:05,328 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-17 05:58:05,328 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-17 05:58:05,328 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 05:57:56" (3/4) ... [2023-02-17 05:58:05,329 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-17 05:58:05,357 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-17 05:58:05,358 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-17 05:58:05,358 INFO L158 Benchmark]: Toolchain (without parser) took 9109.00ms. Allocated memory was 127.9MB in the beginning and 218.1MB in the end (delta: 90.2MB). Free memory was 86.2MB in the beginning and 161.0MB in the end (delta: -74.7MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. [2023-02-17 05:58:05,358 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 127.9MB. Free memory is still 104.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 05:58:05,358 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.33ms. Allocated memory is still 127.9MB. Free memory was 86.2MB in the beginning and 69.5MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-02-17 05:58:05,359 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.72ms. Allocated memory is still 127.9MB. Free memory was 69.5MB in the beginning and 67.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 05:58:05,359 INFO L158 Benchmark]: Boogie Preprocessor took 13.87ms. Allocated memory is still 127.9MB. Free memory was 67.5MB in the beginning and 66.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 05:58:05,359 INFO L158 Benchmark]: RCFGBuilder took 315.41ms. Allocated memory is still 127.9MB. Free memory was 66.3MB in the beginning and 96.8MB in the end (delta: -30.5MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. [2023-02-17 05:58:05,359 INFO L158 Benchmark]: TraceAbstraction took 8441.48ms. Allocated memory was 127.9MB in the beginning and 218.1MB in the end (delta: 90.2MB). Free memory was 96.3MB in the beginning and 165.2MB in the end (delta: -68.8MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2023-02-17 05:58:05,360 INFO L158 Benchmark]: Witness Printer took 30.10ms. Allocated memory is still 218.1MB. Free memory was 165.2MB in the beginning and 161.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-17 05:58:05,360 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 127.9MB. Free memory is still 104.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.33ms. Allocated memory is still 127.9MB. Free memory was 86.2MB in the beginning and 69.5MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.72ms. Allocated memory is still 127.9MB. Free memory was 69.5MB in the beginning and 67.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.87ms. Allocated memory is still 127.9MB. Free memory was 67.5MB in the beginning and 66.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 315.41ms. Allocated memory is still 127.9MB. Free memory was 66.3MB in the beginning and 96.8MB in the end (delta: -30.5MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. * TraceAbstraction took 8441.48ms. Allocated memory was 127.9MB in the beginning and 218.1MB in the end (delta: 90.2MB). Free memory was 96.3MB in the beginning and 165.2MB in the end (delta: -68.8MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. * Witness Printer took 30.10ms. Allocated memory is still 218.1MB. Free memory was 165.2MB in the beginning and 161.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 6]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L519] void * guard_malloc_counter = 0; [L534] struct list_head *elem = ((void *)0); [L544] static struct list_head head; VAL [elem={0:0}, guard_malloc_counter={0:0}, head={4:0}] [L546] struct list_head *dev1, *dev2; VAL [elem={0:0}, guard_malloc_counter={0:0}, head={4:0}] [L547] CALL, EXPR my_malloc(sizeof(*dev1)) VAL [\old(guard_malloc_counter)={0:0}, elem={0:0}, guard_malloc_counter={0:0}, head={4:0}] [L529] CALL, EXPR __getMemory(size) [L522] (size > 0) ? (0) : __blast_assert () VAL [\old(guard_malloc_counter)={0:0}, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={4:0}, size=8] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; VAL [\old(guard_malloc_counter)={0:0}, \old(size)=8, \result={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={4:0}, size=8] [L529] RET, EXPR __getMemory(size) [L529] return __getMemory(size); [L547] RET, EXPR my_malloc(sizeof(*dev1)) VAL [elem={0:0}, guard_malloc_counter={0:1}, head={4:0}, my_malloc(sizeof(*dev1))={0:1}] [L547] dev1 = my_malloc(sizeof(*dev1)) [L548] CALL, EXPR my_malloc(sizeof(*dev2)) VAL [\old(guard_malloc_counter)={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={4:0}] [L529] CALL, EXPR __getMemory(size) [L522] (size > 0) ? (0) : __blast_assert () VAL [\old(guard_malloc_counter)={0:1}, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={4:0}, size=8] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; VAL [\old(guard_malloc_counter)={0:1}, \old(size)=8, \result={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, size=8] [L529] RET, EXPR __getMemory(size) [L529] return __getMemory(size); [L548] RET, EXPR my_malloc(sizeof(*dev2)) VAL [dev1={0:1}, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, my_malloc(sizeof(*dev2))={0:2}] [L548] dev2 = my_malloc(sizeof(*dev2)) [L549] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) VAL [dev1={0:1}, dev2={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}] [L550] CALL list_add(dev2, &head) VAL [\old(elem)={0:0}, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:2}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)={0:0}, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:2}, new={0:2}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new VAL [\old(elem)={0:0}, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:2}, new={0:2}] [L550] RET list_add(dev2, &head) VAL [dev1={0:1}, dev2={0:2}, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}] [L551] CALL list_add(dev1, &head) VAL [\old(elem)={0:2}, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:1}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)={0:2}, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:1}, new={0:1}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new VAL [\old(elem)={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:1}, new={0:1}] [L551] RET list_add(dev1, &head) VAL [dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] [L552] CALL list_del(dev2) [L541] COND FALSE !(entry==elem) VAL [elem={0:1}, entry={0:2}, entry={0:2}, guard_malloc_counter={0:2}, head={4:0}] [L552] RET list_del(dev2) [L553] CALL list_add(dev2, &head) VAL [\old(elem)={0:1}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:2}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)={0:1}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:2}, new={0:2}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L553] RET list_add(dev2, &head) VAL [dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] [L554] CALL list_add(dev1, &head) VAL [\old(elem)={0:1}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:1}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)={0:1}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:1}, new={0:1}] [L536] CALL __blast_assert () VAL [\old(elem)={0:1}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] [L6] reach_error() VAL [\old(elem)={0:1}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.3s, OverallIterations: 11, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 567 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 564 mSDsluCounter, 1100 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 899 mSDsCounter, 269 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4404 IncrementalHoareTripleChecker+Invalid, 4673 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 269 mSolverCounterUnsat, 201 mSDtfsCounter, 4404 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 759 GetRequests, 432 SyntacticMatches, 60 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=8, InterpolantAutomatonStates: 135, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 52 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 663 NumberOfCodeBlocks, 663 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 810 ConstructedInterpolants, 0 QuantifiedInterpolants, 3223 SizeOfPredicates, 57 NumberOfNonLiveVariables, 1715 ConjunctsInSsa, 151 ConjunctsInUnsatCore, 24 InterpolantComputations, 4 PerfectInterpolantSequences, 182/283 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-17 05:58:05,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE