./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-properties/simple_built_from_end.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 279a162aa90145a7316b3266460570a8e3cad8e6 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 279a162aa90145a7316b3266460570a8e3cad8e6 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 06:50:44,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 06:50:44,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 06:50:44,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 06:50:44,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 06:50:44,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 06:50:44,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 06:50:44,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 06:50:44,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 06:50:44,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 06:50:44,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 06:50:44,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 06:50:44,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 06:50:44,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 06:50:44,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 06:50:44,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 06:50:44,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 06:50:44,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 06:50:44,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 06:50:44,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 06:50:44,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 06:50:44,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 06:50:44,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 06:50:44,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 06:50:44,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 06:50:44,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 06:50:44,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 06:50:44,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 06:50:44,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 06:50:44,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 06:50:44,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 06:50:44,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 06:50:44,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 06:50:44,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 06:50:44,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 06:50:44,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 06:50:44,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 06:50:44,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 06:50:44,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 06:50:44,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 06:50:44,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 06:50:44,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 06:50:44,753 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 06:50:44,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 06:50:44,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 06:50:44,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 06:50:44,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 06:50:44,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 06:50:44,755 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 06:50:44,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 06:50:44,755 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 06:50:44,756 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 06:50:44,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 06:50:44,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 06:50:44,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 06:50:44,756 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 06:50:44,756 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 06:50:44,757 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 06:50:44,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 06:50:44,757 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 06:50:44,757 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 06:50:44,757 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 06:50:44,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 06:50:44,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 06:50:44,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 06:50:44,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:50:44,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 06:50:44,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 06:50:44,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 06:50:44,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 06:50:44,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 06:50:44,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2021-08-27 06:50:45,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 06:50:45,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 06:50:45,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 06:50:45,025 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 06:50:45,026 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 06:50:45,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-08-27 06:50:45,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f5bc3207/8b18d665cd804ffeade7a87e0a74eeb4/FLAGe1fc23ebf [2021-08-27 06:50:45,524 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 06:50:45,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-08-27 06:50:45,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f5bc3207/8b18d665cd804ffeade7a87e0a74eeb4/FLAGe1fc23ebf [2021-08-27 06:50:45,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f5bc3207/8b18d665cd804ffeade7a87e0a74eeb4 [2021-08-27 06:50:45,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 06:50:45,555 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 06:50:45,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 06:50:45,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 06:50:45,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 06:50:45,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:50:45" (1/1) ... [2021-08-27 06:50:45,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a138621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:45, skipping insertion in model container [2021-08-27 06:50:45,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:50:45" (1/1) ... [2021-08-27 06:50:45,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 06:50:45,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 06:50:45,756 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-08-27 06:50:45,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:50:45,770 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 06:50:45,817 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-08-27 06:50:45,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:50:45,841 INFO L208 MainTranslator]: Completed translation [2021-08-27 06:50:45,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:45 WrapperNode [2021-08-27 06:50:45,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 06:50:45,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 06:50:45,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 06:50:45,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 06:50:45,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:45" (1/1) ... [2021-08-27 06:50:45,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:45" (1/1) ... [2021-08-27 06:50:45,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:45" (1/1) ... [2021-08-27 06:50:45,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:45" (1/1) ... [2021-08-27 06:50:45,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:45" (1/1) ... [2021-08-27 06:50:45,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:45" (1/1) ... [2021-08-27 06:50:45,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:45" (1/1) ... [2021-08-27 06:50:45,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 06:50:45,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 06:50:45,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 06:50:45,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 06:50:45,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:45" (1/1) ... [2021-08-27 06:50:45,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:50:45,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:50:45,907 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) [2021-08-27 06:50:45,909 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 [2021-08-27 06:50:45,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 06:50:45,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 06:50:45,934 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 06:50:45,934 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 06:50:45,934 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 06:50:45,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 06:50:45,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 06:50:45,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 06:50:45,935 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-27 06:50:45,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 06:50:45,935 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 06:50:45,935 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 06:50:45,936 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 06:50:45,936 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 06:50:45,936 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 06:50:45,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 06:50:45,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 06:50:45,936 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 06:50:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 06:50:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 06:50:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 06:50:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 06:50:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 06:50:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 06:50:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 06:50:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 06:50:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 06:50:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 06:50:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 06:50:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 06:50:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 06:50:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 06:50:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 06:50:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 06:50:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 06:50:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 06:50:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 06:50:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 06:50:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 06:50:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 06:50:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 06:50:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 06:50:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 06:50:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 06:50:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 06:50:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 06:50:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 06:50:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 06:50:45,941 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 06:50:45,941 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 06:50:45,941 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 06:50:45,941 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 06:50:45,941 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 06:50:45,941 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 06:50:45,941 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 06:50:45,941 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 06:50:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 06:50:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 06:50:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 06:50:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 06:50:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 06:50:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 06:50:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 06:50:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 06:50:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 06:50:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 06:50:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 06:50:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 06:50:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 06:50:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 06:50:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 06:50:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 06:50:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 06:50:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 06:50:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 06:50:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 06:50:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 06:50:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 06:50:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 06:50:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 06:50:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 06:50:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 06:50:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 06:50:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 06:50:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 06:50:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 06:50:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 06:50:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 06:50:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 06:50:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 06:50:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 06:50:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 06:50:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 06:50:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 06:50:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 06:50:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 06:50:45,947 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 06:50:45,947 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 06:50:45,947 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 06:50:45,947 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 06:50:45,947 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 06:50:45,947 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 06:50:45,947 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 06:50:45,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 06:50:45,948 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 06:50:45,948 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 06:50:45,948 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 06:50:45,948 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 06:50:45,948 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 06:50:45,948 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 06:50:45,948 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 06:50:45,948 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 06:50:45,948 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 06:50:45,949 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 06:50:45,949 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 06:50:45,949 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 06:50:45,949 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 06:50:45,949 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 06:50:45,949 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 06:50:45,949 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 06:50:45,949 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 06:50:45,950 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 06:50:45,950 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 06:50:45,950 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-27 06:50:45,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 06:50:45,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 06:50:45,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 06:50:45,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 06:50:45,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 06:50:45,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 06:50:45,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 06:50:45,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 06:50:45,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 06:50:45,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 06:50:46,224 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-27 06:50:46,336 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 06:50:46,336 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-27 06:50:46,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:46 BoogieIcfgContainer [2021-08-27 06:50:46,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 06:50:46,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 06:50:46,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 06:50:46,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 06:50:46,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 06:50:45" (1/3) ... [2021-08-27 06:50:46,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f012d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:50:46, skipping insertion in model container [2021-08-27 06:50:46,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:45" (2/3) ... [2021-08-27 06:50:46,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f012d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:50:46, skipping insertion in model container [2021-08-27 06:50:46,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:46" (3/3) ... [2021-08-27 06:50:46,352 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-08-27 06:50:46,359 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 06:50:46,360 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-08-27 06:50:46,402 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 06:50:46,408 INFO L339 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 06:50:46,418 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-08-27 06:50:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:50:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-27 06:50:46,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:46,440 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:46,441 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:46,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1752578520, now seen corresponding path program 1 times [2021-08-27 06:50:46,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:46,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616013147] [2021-08-27 06:50:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:46,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:46,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:46,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:46,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616013147] [2021-08-27 06:50:46,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616013147] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:46,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:46,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 06:50:46,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784169875] [2021-08-27 06:50:46,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 06:50:46,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:46,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 06:50:46,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 06:50:46,654 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:46,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:46,749 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-08-27 06:50:46,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 06:50:46,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-27 06:50:46,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:46,756 INFO L225 Difference]: With dead ends: 50 [2021-08-27 06:50:46,756 INFO L226 Difference]: Without dead ends: 42 [2021-08-27 06:50:46,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 06:50:46,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-27 06:50:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-08-27 06:50:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 32 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-08-27 06:50:46,796 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 9 [2021-08-27 06:50:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:46,796 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-08-27 06:50:46,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-08-27 06:50:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 06:50:46,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:46,797 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:46,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 06:50:46,797 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:46,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:46,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1503990498, now seen corresponding path program 1 times [2021-08-27 06:50:46,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:46,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874046458] [2021-08-27 06:50:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:46,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:46,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:46,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:46,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874046458] [2021-08-27 06:50:46,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874046458] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:46,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:46,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:50:46,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106272268] [2021-08-27 06:50:46,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:50:46,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:46,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:50:46,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:50:46,901 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:46,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:46,959 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-08-27 06:50:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:50:46,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 06:50:46,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:46,961 INFO L225 Difference]: With dead ends: 40 [2021-08-27 06:50:46,961 INFO L226 Difference]: Without dead ends: 39 [2021-08-27 06:50:46,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-27 06:50:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-08-27 06:50:46,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:46,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-08-27 06:50:46,964 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 10 [2021-08-27 06:50:46,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:46,964 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-08-27 06:50:46,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:46,965 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-08-27 06:50:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 06:50:46,965 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:46,965 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:46,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 06:50:46,965 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:46,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1503991813, now seen corresponding path program 1 times [2021-08-27 06:50:46,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:46,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705805493] [2021-08-27 06:50:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:46,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:47,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:47,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:47,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705805493] [2021-08-27 06:50:47,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705805493] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:47,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:47,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 06:50:47,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956842633] [2021-08-27 06:50:47,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:50:47,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:47,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:50:47,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:50:47,010 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:47,045 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-08-27 06:50:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:50:47,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 06:50:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:47,046 INFO L225 Difference]: With dead ends: 29 [2021-08-27 06:50:47,046 INFO L226 Difference]: Without dead ends: 29 [2021-08-27 06:50:47,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:50:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-27 06:50:47,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-27 06:50:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.5) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-08-27 06:50:47,049 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 10 [2021-08-27 06:50:47,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:47,049 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-08-27 06:50:47,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,049 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-08-27 06:50:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 06:50:47,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:47,050 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:47,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 06:50:47,050 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:47,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1503991814, now seen corresponding path program 1 times [2021-08-27 06:50:47,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:47,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291247378] [2021-08-27 06:50:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:47,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:47,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:47,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:47,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291247378] [2021-08-27 06:50:47,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291247378] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:47,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:47,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 06:50:47,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403743084] [2021-08-27 06:50:47,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:50:47,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:47,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:50:47,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:50:47,109 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:47,141 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-08-27 06:50:47,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:50:47,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 06:50:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:47,142 INFO L225 Difference]: With dead ends: 27 [2021-08-27 06:50:47,143 INFO L226 Difference]: Without dead ends: 27 [2021-08-27 06:50:47,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:50:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-27 06:50:47,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-27 06:50:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-08-27 06:50:47,153 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 10 [2021-08-27 06:50:47,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:47,153 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-08-27 06:50:47,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-08-27 06:50:47,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 06:50:47,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:47,154 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:47,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 06:50:47,155 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:47,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2071629249, now seen corresponding path program 1 times [2021-08-27 06:50:47,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:47,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125509226] [2021-08-27 06:50:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:47,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:47,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:47,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:47,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125509226] [2021-08-27 06:50:47,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125509226] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:47,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:47,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 06:50:47,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966982980] [2021-08-27 06:50:47,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:50:47,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:47,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:50:47,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:47,246 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:47,319 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-08-27 06:50:47,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:50:47,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-27 06:50:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:47,321 INFO L225 Difference]: With dead ends: 42 [2021-08-27 06:50:47,321 INFO L226 Difference]: Without dead ends: 42 [2021-08-27 06:50:47,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-27 06:50:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2021-08-27 06:50:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-08-27 06:50:47,327 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 16 [2021-08-27 06:50:47,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:47,328 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-08-27 06:50:47,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,328 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-08-27 06:50:47,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 06:50:47,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:47,328 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:47,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 06:50:47,329 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:47,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:47,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2071629292, now seen corresponding path program 1 times [2021-08-27 06:50:47,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:47,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609080813] [2021-08-27 06:50:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:47,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:47,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:47,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:47,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609080813] [2021-08-27 06:50:47,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609080813] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:47,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:47,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:50:47,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862302240] [2021-08-27 06:50:47,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:50:47,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:50:47,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:47,397 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:47,458 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-08-27 06:50:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:50:47,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-27 06:50:47,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:47,459 INFO L225 Difference]: With dead ends: 33 [2021-08-27 06:50:47,459 INFO L226 Difference]: Without dead ends: 33 [2021-08-27 06:50:47,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:47,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-27 06:50:47,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-08-27 06:50:47,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-08-27 06:50:47,465 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2021-08-27 06:50:47,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:47,465 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-08-27 06:50:47,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,465 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-08-27 06:50:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 06:50:47,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:47,466 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:47,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 06:50:47,466 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:47,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:47,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2071629293, now seen corresponding path program 1 times [2021-08-27 06:50:47,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:47,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445633419] [2021-08-27 06:50:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:47,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:47,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:47,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:47,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445633419] [2021-08-27 06:50:47,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445633419] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:47,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:47,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:50:47,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862601739] [2021-08-27 06:50:47,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:50:47,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:47,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:50:47,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:47,567 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:47,636 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-08-27 06:50:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:50:47,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-27 06:50:47,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:47,637 INFO L225 Difference]: With dead ends: 37 [2021-08-27 06:50:47,637 INFO L226 Difference]: Without dead ends: 37 [2021-08-27 06:50:47,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:47,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-27 06:50:47,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-08-27 06:50:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-08-27 06:50:47,639 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2021-08-27 06:50:47,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:47,640 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-08-27 06:50:47,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,640 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-08-27 06:50:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 06:50:47,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:47,641 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:47,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 06:50:47,641 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr6ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:47,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2029074739, now seen corresponding path program 1 times [2021-08-27 06:50:47,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:47,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986324231] [2021-08-27 06:50:47,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:47,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:47,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:47,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:47,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986324231] [2021-08-27 06:50:47,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986324231] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:47,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:47,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:50:47,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006018067] [2021-08-27 06:50:47,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:50:47,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:47,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:50:47,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:47,711 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:47,803 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-08-27 06:50:47,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:50:47,804 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-08-27 06:50:47,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:47,804 INFO L225 Difference]: With dead ends: 34 [2021-08-27 06:50:47,804 INFO L226 Difference]: Without dead ends: 34 [2021-08-27 06:50:47,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:50:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-27 06:50:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-08-27 06:50:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-08-27 06:50:47,806 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-08-27 06:50:47,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:47,807 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-08-27 06:50:47,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:47,807 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-08-27 06:50:47,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 06:50:47,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:47,807 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:47,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 06:50:47,808 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:47,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:47,808 INFO L82 PathProgramCache]: Analyzing trace with hash -790989135, now seen corresponding path program 1 times [2021-08-27 06:50:47,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:47,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567826141] [2021-08-27 06:50:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:47,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 06:50:47,819 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 06:50:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 06:50:47,857 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 06:50:47,857 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 06:50:47,858 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 06:50:47,859 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 06:50:47,859 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 06:50:47,859 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 06:50:47,859 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-08-27 06:50:47,860 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-08-27 06:50:47,860 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-08-27 06:50:47,860 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 06:50:47,860 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-08-27 06:50:47,860 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-08-27 06:50:47,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 06:50:47,864 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 06:50:47,873 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-27 06:50:47,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 06:50:47 BoogieIcfgContainer [2021-08-27 06:50:47,887 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 06:50:47,888 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 06:50:47,888 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 06:50:47,888 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 06:50:47,888 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:46" (3/4) ... [2021-08-27 06:50:47,890 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 06:50:47,890 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 06:50:47,895 INFO L168 Benchmark]: Toolchain (without parser) took 2335.75 ms. Allocated memory was 56.6 MB in the beginning and 104.9 MB in the end (delta: 48.2 MB). Free memory was 34.2 MB in the beginning and 64.3 MB in the end (delta: -30.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:47,896 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 56.6 MB. Free memory was 38.9 MB in the beginning and 38.9 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:50:47,898 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.98 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 34.0 MB in the beginning and 47.4 MB in the end (delta: -13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:47,898 INFO L168 Benchmark]: Boogie Preprocessor took 35.18 ms. Allocated memory is still 69.2 MB. Free memory was 47.2 MB in the beginning and 44.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:47,898 INFO L168 Benchmark]: RCFGBuilder took 464.50 ms. Allocated memory is still 69.2 MB. Free memory was 44.7 MB in the beginning and 35.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:47,898 INFO L168 Benchmark]: TraceAbstraction took 1541.43 ms. Allocated memory was 69.2 MB in the beginning and 104.9 MB in the end (delta: 35.7 MB). Free memory was 34.9 MB in the beginning and 65.1 MB in the end (delta: -30.2 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:47,899 INFO L168 Benchmark]: Witness Printer took 2.62 ms. Allocated memory is still 104.9 MB. Free memory was 65.1 MB in the beginning and 64.3 MB in the end (delta: 813.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:50:47,902 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 56.6 MB. Free memory was 38.9 MB in the beginning and 38.9 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 285.98 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 34.0 MB in the beginning and 47.4 MB in the end (delta: -13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.18 ms. Allocated memory is still 69.2 MB. Free memory was 47.2 MB in the beginning and 44.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 464.50 ms. Allocated memory is still 69.2 MB. Free memory was 44.7 MB in the beginning and 35.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1541.43 ms. Allocated memory was 69.2 MB in the beginning and 104.9 MB in the end (delta: 35.7 MB). Free memory was 34.9 MB in the beginning and 65.1 MB in the end (delta: -30.2 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * Witness Printer took 2.62 ms. Allocated memory is still 104.9 MB. Free memory was 65.1 MB in the beginning and 64.3 MB in the end (delta: 813.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; VAL [p={0:0}] [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) VAL [p={0:0}, t={-1:0}] [L537] t->h = 1 VAL [p={0:0}, t={-1:0}] [L538] t->n = p VAL [p={0:0}, t={-1:0}] [L539] p = t VAL [p={-1:0}, t={-1:0}] [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 VAL [p={-1:0}, t={-1:0}] [L542] EXPR p->h VAL [p={-1:0}, p->h=1, t={-1:0}] [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n VAL [p={-1:0}, p->n={0:0}, t={-1:0}] [L545] p = p->n [L541] COND FALSE !(p!=0) VAL [p={0:0}, t={-1:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 54 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 1462.0ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 16.0ms, AutomataDifference: 551.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 151 SDtfs, 202 SDslu, 103 SDs, 0 SdLazy, 402 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 318.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 210.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=1, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 57.8ms AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 28.7ms SsaConstructionTime, 94.3ms SatisfiabilityAnalysisTime, 495.8ms InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 478 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 8/8 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 could not prove your program: unable to determine feasibility of some traces [2021-08-27 06:50:47,930 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... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 06:50:49,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 06:50:49,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 06:50:49,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 06:50:49,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 06:50:49,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 06:50:49,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 06:50:49,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 06:50:49,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 06:50:49,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 06:50:49,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 06:50:49,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 06:50:49,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 06:50:49,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 06:50:49,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 06:50:49,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 06:50:49,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 06:50:49,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 06:50:49,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 06:50:49,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 06:50:49,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 06:50:49,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 06:50:49,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 06:50:49,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 06:50:49,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 06:50:49,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 06:50:49,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 06:50:49,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 06:50:49,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 06:50:49,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 06:50:49,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 06:50:49,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 06:50:49,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 06:50:49,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 06:50:49,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 06:50:49,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 06:50:49,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 06:50:49,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 06:50:49,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 06:50:49,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 06:50:49,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 06:50:49,647 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-08-27 06:50:49,675 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 06:50:49,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 06:50:49,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 06:50:49,677 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 06:50:49,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 06:50:49,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 06:50:49,678 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 06:50:49,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 06:50:49,679 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 06:50:49,679 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 06:50:49,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 06:50:49,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 06:50:49,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 06:50:49,680 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 06:50:49,680 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 06:50:49,680 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 06:50:49,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 06:50:49,681 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 06:50:49,681 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-27 06:50:49,681 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-27 06:50:49,681 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 06:50:49,681 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 06:50:49,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 06:50:49,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 06:50:49,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 06:50:49,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:50:49,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 06:50:49,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 06:50:49,682 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-27 06:50:49,683 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-27 06:50:49,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 06:50:49,683 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-27 06:50:49,683 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2021-08-27 06:50:49,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 06:50:49,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 06:50:49,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 06:50:49,975 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 06:50:49,975 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 06:50:49,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-08-27 06:50:50,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4c39c1a1/59086b5994a543a296f5461f2c42359e/FLAGc19c51bb6 [2021-08-27 06:50:50,470 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 06:50:50,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-08-27 06:50:50,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4c39c1a1/59086b5994a543a296f5461f2c42359e/FLAGc19c51bb6 [2021-08-27 06:50:50,498 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4c39c1a1/59086b5994a543a296f5461f2c42359e [2021-08-27 06:50:50,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 06:50:50,501 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 06:50:50,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 06:50:50,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 06:50:50,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 06:50:50,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:50:50" (1/1) ... [2021-08-27 06:50:50,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ee74b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:50, skipping insertion in model container [2021-08-27 06:50:50,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:50:50" (1/1) ... [2021-08-27 06:50:50,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 06:50:50,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 06:50:50,796 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-08-27 06:50:50,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:50:50,811 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 06:50:50,842 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-08-27 06:50:50,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:50:50,861 INFO L208 MainTranslator]: Completed translation [2021-08-27 06:50:50,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:50 WrapperNode [2021-08-27 06:50:50,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 06:50:50,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 06:50:50,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 06:50:50,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 06:50:50,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:50" (1/1) ... [2021-08-27 06:50:50,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:50" (1/1) ... [2021-08-27 06:50:50,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:50" (1/1) ... [2021-08-27 06:50:50,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:50" (1/1) ... [2021-08-27 06:50:50,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:50" (1/1) ... [2021-08-27 06:50:50,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:50" (1/1) ... [2021-08-27 06:50:50,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:50" (1/1) ... [2021-08-27 06:50:50,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 06:50:50,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 06:50:50,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 06:50:50,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 06:50:50,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:50" (1/1) ... [2021-08-27 06:50:50,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:50:50,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:50:50,936 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) [2021-08-27 06:50:50,950 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 [2021-08-27 06:50:50,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 06:50:50,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 06:50:50,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-08-27 06:50:50,970 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 06:50:50,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 06:50:50,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 06:50:50,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 06:50:50,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 06:50:50,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 06:50:50,972 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-27 06:50:50,972 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 06:50:50,972 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 06:50:50,972 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 06:50:50,972 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 06:50:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 06:50:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 06:50:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 06:50:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 06:50:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 06:50:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 06:50:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 06:50:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 06:50:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 06:50:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 06:50:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 06:50:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 06:50:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 06:50:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 06:50:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 06:50:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 06:50:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 06:50:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 06:50:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 06:50:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 06:50:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 06:50:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 06:50:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 06:50:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 06:50:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 06:50:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 06:50:50,976 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 06:50:50,976 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 06:50:50,976 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 06:50:50,976 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 06:50:50,976 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 06:50:50,976 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 06:50:50,977 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 06:50:50,977 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 06:50:50,977 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 06:50:50,977 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 06:50:50,977 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 06:50:50,977 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 06:50:50,978 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 06:50:50,978 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 06:50:50,978 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 06:50:50,978 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 06:50:50,978 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 06:50:50,978 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 06:50:50,979 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 06:50:50,979 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 06:50:50,979 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 06:50:50,979 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 06:50:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 06:50:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 06:50:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 06:50:50,981 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 06:50:50,981 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 06:50:50,981 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 06:50:50,981 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 06:50:50,981 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 06:50:50,981 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 06:50:50,981 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 06:50:50,981 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 06:50:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 06:50:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 06:50:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 06:50:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 06:50:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 06:50:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 06:50:50,983 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 06:50:50,983 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 06:50:50,983 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 06:50:50,983 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 06:50:50,983 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 06:50:50,983 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 06:50:50,983 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 06:50:50,984 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 06:50:50,984 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 06:50:50,984 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 06:50:50,984 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 06:50:50,984 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 06:50:50,984 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 06:50:50,984 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 06:50:50,984 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 06:50:50,984 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 06:50:50,985 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 06:50:50,985 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 06:50:50,985 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 06:50:50,985 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 06:50:50,985 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 06:50:50,985 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 06:50:50,986 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 06:50:50,986 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 06:50:50,986 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 06:50:50,986 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 06:50:50,986 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 06:50:50,986 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 06:50:50,986 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 06:50:50,986 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 06:50:50,986 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 06:50:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 06:50:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 06:50:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 06:50:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 06:50:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 06:50:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 06:50:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 06:50:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 06:50:50,988 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 06:50:50,988 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 06:50:50,988 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 06:50:50,988 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 06:50:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 06:50:50,995 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 06:50:50,995 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-27 06:50:50,997 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 06:50:50,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 06:50:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-27 06:50:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 06:50:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-27 06:50:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 06:50:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 06:50:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-27 06:50:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 06:50:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-08-27 06:50:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-08-27 06:50:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-08-27 06:50:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 06:50:51,329 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-27 06:50:51,440 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 06:50:51,441 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-27 06:50:51,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:51 BoogieIcfgContainer [2021-08-27 06:50:51,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 06:50:51,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 06:50:51,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 06:50:51,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 06:50:51,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 06:50:50" (1/3) ... [2021-08-27 06:50:51,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cecb6eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:50:51, skipping insertion in model container [2021-08-27 06:50:51,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:50" (2/3) ... [2021-08-27 06:50:51,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cecb6eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:50:51, skipping insertion in model container [2021-08-27 06:50:51,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:51" (3/3) ... [2021-08-27 06:50:51,452 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-08-27 06:50:51,455 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 06:50:51,456 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-08-27 06:50:51,485 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 06:50:51,489 INFO L339 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 06:50:51,489 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-08-27 06:50:51,497 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:50:51,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-27 06:50:51,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:51,501 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:51,502 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:51,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1599181994, now seen corresponding path program 1 times [2021-08-27 06:50:51,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:51,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957048179] [2021-08-27 06:50:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:51,513 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:51,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:51,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:51,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-27 06:50:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:51,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 06:50:51,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:51,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:51,750 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:51,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957048179] [2021-08-27 06:50:51,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957048179] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:51,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:51,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-27 06:50:51,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511377386] [2021-08-27 06:50:51,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 06:50:51,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:51,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 06:50:51,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 06:50:51,775 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:51,835 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-08-27 06:50:51,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 06:50:51,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-27 06:50:51,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:51,840 INFO L225 Difference]: With dead ends: 47 [2021-08-27 06:50:51,841 INFO L226 Difference]: Without dead ends: 40 [2021-08-27 06:50:51,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 06:50:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-27 06:50:51,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-08-27 06:50:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 30 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-08-27 06:50:51,866 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 9 [2021-08-27 06:50:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:51,867 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-08-27 06:50:51,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-08-27 06:50:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-27 06:50:51,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:51,868 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:51,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-08-27 06:50:52,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:52,078 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:52,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1599182037, now seen corresponding path program 1 times [2021-08-27 06:50:52,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:52,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879532240] [2021-08-27 06:50:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:52,081 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:52,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:52,082 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:52,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-27 06:50:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:52,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 06:50:52,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:52,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:52,319 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:52,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879532240] [2021-08-27 06:50:52,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879532240] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:52,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:52,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-08-27 06:50:52,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725332129] [2021-08-27 06:50:52,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 06:50:52,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:52,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 06:50:52,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 06:50:52,323 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:52,357 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-08-27 06:50:52,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 06:50:52,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-27 06:50:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:52,359 INFO L225 Difference]: With dead ends: 38 [2021-08-27 06:50:52,359 INFO L226 Difference]: Without dead ends: 37 [2021-08-27 06:50:52,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 06:50:52,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-27 06:50:52,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2021-08-27 06:50:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.6875) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-08-27 06:50:52,365 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 9 [2021-08-27 06:50:52,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:52,366 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-08-27 06:50:52,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-08-27 06:50:52,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-27 06:50:52,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:52,369 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:52,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:52,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:52,581 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:52,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:52,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1599183352, now seen corresponding path program 1 times [2021-08-27 06:50:52,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:52,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096612241] [2021-08-27 06:50:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:52,582 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:52,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:52,584 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:52,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-27 06:50:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 06:50:52,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:52,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:50:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:52,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:52,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:52,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096612241] [2021-08-27 06:50:52,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096612241] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:52,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:52,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-27 06:50:52,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287784130] [2021-08-27 06:50:52,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 06:50:52,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:52,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 06:50:52,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 06:50:52,780 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:52,812 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-08-27 06:50:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 06:50:52,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-27 06:50:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:52,813 INFO L225 Difference]: With dead ends: 27 [2021-08-27 06:50:52,813 INFO L226 Difference]: Without dead ends: 27 [2021-08-27 06:50:52,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 06:50:52,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-27 06:50:52,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-27 06:50:52,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.5625) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-08-27 06:50:52,815 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2021-08-27 06:50:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:52,815 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-08-27 06:50:52,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-08-27 06:50:52,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-27 06:50:52,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:52,816 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:52,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-08-27 06:50:53,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:53,027 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:53,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1599183353, now seen corresponding path program 1 times [2021-08-27 06:50:53,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:53,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092813100] [2021-08-27 06:50:53,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:53,028 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:53,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:53,029 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:53,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-27 06:50:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:53,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 06:50:53,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:53,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:50:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:53,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:53,279 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:53,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092813100] [2021-08-27 06:50:53,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092813100] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:53,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:53,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-08-27 06:50:53,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530412140] [2021-08-27 06:50:53,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:50:53,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:53,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:50:53,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:50:53,281 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:53,315 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-08-27 06:50:53,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 06:50:53,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-27 06:50:53,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:53,316 INFO L225 Difference]: With dead ends: 25 [2021-08-27 06:50:53,316 INFO L226 Difference]: Without dead ends: 25 [2021-08-27 06:50:53,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:50:53,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-27 06:50:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-27 06:50:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:53,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-08-27 06:50:53,319 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 9 [2021-08-27 06:50:53,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:53,319 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-08-27 06:50:53,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:53,319 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-08-27 06:50:53,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 06:50:53,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:53,320 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:53,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:53,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:53,527 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:53,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:53,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1238042382, now seen corresponding path program 1 times [2021-08-27 06:50:53,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:53,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349497802] [2021-08-27 06:50:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:53,528 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:53,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:53,529 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:53,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-27 06:50:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:53,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 06:50:53,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:53,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:53,750 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:53,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349497802] [2021-08-27 06:50:53,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349497802] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:53,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:53,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-27 06:50:53,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377328141] [2021-08-27 06:50:53,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:50:53,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:53,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:50:53,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:50:53,751 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:53,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:53,814 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-08-27 06:50:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:50:53,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-27 06:50:53,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:53,815 INFO L225 Difference]: With dead ends: 40 [2021-08-27 06:50:53,815 INFO L226 Difference]: Without dead ends: 40 [2021-08-27 06:50:53,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-27 06:50:53,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2021-08-27 06:50:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.411764705882353) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:53,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-08-27 06:50:53,817 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14 [2021-08-27 06:50:53,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:53,817 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-08-27 06:50:53,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:53,818 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-08-27 06:50:53,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 06:50:53,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:53,818 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:53,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:54,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:54,025 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:54,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:54,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1238042425, now seen corresponding path program 1 times [2021-08-27 06:50:54,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:54,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177645325] [2021-08-27 06:50:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:54,026 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:54,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:54,026 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:54,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-27 06:50:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:54,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 06:50:54,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:54,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:50:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:54,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:54,266 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:54,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177645325] [2021-08-27 06:50:54,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177645325] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:54,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:54,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-08-27 06:50:54,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672563740] [2021-08-27 06:50:54,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:50:54,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:54,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:50:54,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:50:54,267 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:54,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:54,344 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-08-27 06:50:54,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:50:54,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-27 06:50:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:54,345 INFO L225 Difference]: With dead ends: 31 [2021-08-27 06:50:54,345 INFO L226 Difference]: Without dead ends: 31 [2021-08-27 06:50:54,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:54,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-27 06:50:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-08-27 06:50:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-08-27 06:50:54,347 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2021-08-27 06:50:54,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:54,347 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-08-27 06:50:54,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-08-27 06:50:54,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 06:50:54,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:54,348 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:54,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:54,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:54,548 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:54,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1238042426, now seen corresponding path program 1 times [2021-08-27 06:50:54,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:54,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83574694] [2021-08-27 06:50:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:54,549 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:54,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:54,550 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:54,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-27 06:50:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:54,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 06:50:54,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:54,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:50:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:54,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:54,911 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:54,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83574694] [2021-08-27 06:50:54,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83574694] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:54,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:54,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-08-27 06:50:54,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700239561] [2021-08-27 06:50:54,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:50:54,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:54,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:50:54,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:54,913 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:55,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:55,032 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-08-27 06:50:55,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:50:55,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-27 06:50:55,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:55,033 INFO L225 Difference]: With dead ends: 35 [2021-08-27 06:50:55,033 INFO L226 Difference]: Without dead ends: 35 [2021-08-27 06:50:55,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:50:55,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-27 06:50:55,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-08-27 06:50:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-08-27 06:50:55,036 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-08-27 06:50:55,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:55,036 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-08-27 06:50:55,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:55,037 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-08-27 06:50:55,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 06:50:55,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:55,037 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:55,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-08-27 06:50:55,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:55,243 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr6ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:55,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:55,244 INFO L82 PathProgramCache]: Analyzing trace with hash 52831098, now seen corresponding path program 1 times [2021-08-27 06:50:55,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:55,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523523864] [2021-08-27 06:50:55,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:55,244 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:55,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:55,245 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:55,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-27 06:50:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 06:50:55,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:55,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 06:50:55,436 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-27 06:50:55,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-08-27 06:50:55,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 06:50:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:55,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:55,527 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:55,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523523864] [2021-08-27 06:50:55,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523523864] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:55,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:55,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-08-27 06:50:55,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267318085] [2021-08-27 06:50:55,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:50:55,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:55,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:50:55,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:55,529 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:55,626 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-08-27 06:50:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:50:55,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-27 06:50:55,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:55,627 INFO L225 Difference]: With dead ends: 32 [2021-08-27 06:50:55,627 INFO L226 Difference]: Without dead ends: 32 [2021-08-27 06:50:55,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:50:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-27 06:50:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-08-27 06:50:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.3) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-08-27 06:50:55,629 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 16 [2021-08-27 06:50:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:55,630 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-08-27 06:50:55,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:55,630 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-08-27 06:50:55,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 06:50:55,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:55,630 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:55,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:55,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:55,831 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-08-27 06:50:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:55,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1938067545, now seen corresponding path program 1 times [2021-08-27 06:50:55,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:55,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137582152] [2021-08-27 06:50:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:55,832 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:55,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:55,833 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:55,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-08-27 06:50:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 06:50:55,990 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 06:50:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 06:50:56,037 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-27 06:50:56,037 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 06:50:56,038 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 06:50:56,039 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 06:50:56,039 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 06:50:56,039 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 06:50:56,039 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-08-27 06:50:56,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-08-27 06:50:56,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-08-27 06:50:56,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 06:50:56,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-08-27 06:50:56,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-08-27 06:50:56,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:56,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:56,244 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 06:50:56,249 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-27 06:50:56,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 06:50:56 BoogieIcfgContainer [2021-08-27 06:50:56,257 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 06:50:56,258 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 06:50:56,258 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 06:50:56,258 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 06:50:56,259 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:51" (3/4) ... [2021-08-27 06:50:56,260 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 06:50:56,261 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 06:50:56,261 INFO L168 Benchmark]: Toolchain (without parser) took 5760.11 ms. Allocated memory was 65.0 MB in the beginning and 104.9 MB in the end (delta: 39.8 MB). Free memory was 44.2 MB in the beginning and 35.4 MB in the end (delta: 8.8 MB). Peak memory consumption was 48.0 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:56,261 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 65.0 MB. Free memory is still 47.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:50:56,262 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.95 ms. Allocated memory is still 65.0 MB. Free memory was 44.1 MB in the beginning and 41.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:56,262 INFO L168 Benchmark]: Boogie Preprocessor took 40.16 ms. Allocated memory is still 65.0 MB. Free memory was 41.4 MB in the beginning and 38.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:56,263 INFO L168 Benchmark]: RCFGBuilder took 538.91 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 38.3 MB in the beginning and 56.4 MB in the end (delta: -18.1 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:56,263 INFO L168 Benchmark]: TraceAbstraction took 4814.36 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 56.0 MB in the beginning and 35.4 MB in the end (delta: 20.6 MB). Peak memory consumption was 39.2 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:56,263 INFO L168 Benchmark]: Witness Printer took 2.67 ms. Allocated memory is still 104.9 MB. Free memory is still 35.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:50:56,265 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 65.0 MB. Free memory is still 47.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 358.95 ms. Allocated memory is still 65.0 MB. Free memory was 44.1 MB in the beginning and 41.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.16 ms. Allocated memory is still 65.0 MB. Free memory was 41.4 MB in the beginning and 38.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 538.91 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 38.3 MB in the beginning and 56.4 MB in the end (delta: -18.1 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4814.36 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 56.0 MB in the beginning and 35.4 MB in the end (delta: 20.6 MB). Peak memory consumption was 39.2 MB. Max. memory is 16.1 GB. * Witness Printer took 2.67 ms. Allocated memory is still 104.9 MB. Free memory is still 35.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; VAL [p={0:0}] [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) VAL [p={0:0}, t={1:0}] [L537] t->h = 1 VAL [p={0:0}, t={1:0}] [L538] t->n = p VAL [p={0:0}, t={1:0}] [L539] p = t VAL [p={1:0}, t={1:0}] [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 VAL [p={1:0}, t={1:0}] [L542] EXPR p->h VAL [p={1:0}, p->h=1, t={1:0}] [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n VAL [p={1:0}, p->n={0:0}, t={1:0}] [L545] p = p->n [L541] COND FALSE !(p!=0) VAL [p={0:0}, t={1:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 59 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 4759.3ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 9.0ms, AutomataDifference: 552.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 153 SDtfs, 203 SDslu, 118 SDs, 0 SdLazy, 193 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 321.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 186 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 154.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 31.5ms AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 60.8ms SsaConstructionTime, 151.6ms SatisfiabilityAnalysisTime, 1008.8ms InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 172 ConstructedInterpolants, 0 QuantifiedInterpolants, 648 SizeOfPredicates, 9 NumberOfNonLiveVariables, 556 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 8/8 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 could not prove your program: unable to determine feasibility of some traces [2021-08-27 06:50:56,295 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...