./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan --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 Taipan --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=/tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan --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 Taipan --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 0.2.0-7b2dab5 [2020-12-03 12:35:20,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:35:20,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:35:20,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:35:20,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:35:20,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:35:20,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:35:20,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:35:20,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:35:20,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:35:20,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:35:20,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:35:20,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:35:20,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:35:20,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:35:20,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:35:20,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:35:20,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:35:20,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:35:20,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:35:20,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:35:20,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:35:20,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:35:20,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:35:20,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:35:20,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:35:20,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:35:20,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:35:20,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:35:20,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:35:20,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:35:20,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:35:20,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:35:20,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:35:20,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:35:20,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:35:20,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:35:20,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:35:20,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:35:20,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:35:20,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:35:20,999 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-03 12:35:21,046 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:35:21,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:35:21,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:35:21,048 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:35:21,048 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:35:21,049 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:35:21,049 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:35:21,049 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:35:21,049 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:35:21,050 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:35:21,051 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:35:21,051 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:35:21,051 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:35:21,052 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:35:21,052 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:35:21,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 12:35:21,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 12:35:21,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:35:21,054 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:35:21,054 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:35:21,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:35:21,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:35:21,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:35:21,055 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-03 12:35:21,055 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-03 12:35:21,056 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-03 12:35:21,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:35:21,058 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:35:21,058 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:35:21,058 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:35:21,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:35:21,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:35:21,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:35:21,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:35:21,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:35:21,060 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:35:21,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:35:21,061 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:35:21,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:35:21,061 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2020-12-03 12:35:21,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:35:21,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:35:21,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:35:21,403 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:35:21,404 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:35:21,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-12-03 12:35:21,501 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/data/640821c54/22641d0f7c564a1b9e77f7868b0e38c9/FLAG2b58f41c9 [2020-12-03 12:35:21,975 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:35:21,976 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-12-03 12:35:21,999 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/data/640821c54/22641d0f7c564a1b9e77f7868b0e38c9/FLAG2b58f41c9 [2020-12-03 12:35:22,308 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/data/640821c54/22641d0f7c564a1b9e77f7868b0e38c9 [2020-12-03 12:35:22,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:35:22,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:35:22,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:35:22,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:35:22,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:35:22,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:35:22" (1/1) ... [2020-12-03 12:35:22,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f864f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:22, skipping insertion in model container [2020-12-03 12:35:22,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:35:22" (1/1) ... [2020-12-03 12:35:22,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:35:22,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:35:22,726 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2020-12-03 12:35:22,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:35:22,740 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:35:22,793 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2020-12-03 12:35:22,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:35:22,847 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:35:22,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:22 WrapperNode [2020-12-03 12:35:22,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:35:22,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:35:22,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:35:22,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:35:22,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:22" (1/1) ... [2020-12-03 12:35:22,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:22" (1/1) ... [2020-12-03 12:35:22,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:35:22,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:35:22,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:35:22,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:35:22,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:22" (1/1) ... [2020-12-03 12:35:22,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:22" (1/1) ... [2020-12-03 12:35:22,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:22" (1/1) ... [2020-12-03 12:35:22,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:22" (1/1) ... [2020-12-03 12:35:22,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:22" (1/1) ... [2020-12-03 12:35:22,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:22" (1/1) ... [2020-12-03 12:35:22,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:22" (1/1) ... [2020-12-03 12:35:22,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:35:22,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:35:22,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:35:22,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:35:22,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:35:23,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-03 12:35:23,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-03 12:35:23,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-03 12:35:23,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-03 12:35:23,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:35:23,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-03 12:35:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 12:35:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:35:23,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:35:23,384 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:35:23,385 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-03 12:35:23,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:23 BoogieIcfgContainer [2020-12-03 12:35:23,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:35:23,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:35:23,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:35:23,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:35:23,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:35:22" (1/3) ... [2020-12-03 12:35:23,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d2403f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:35:23, skipping insertion in model container [2020-12-03 12:35:23,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:22" (2/3) ... [2020-12-03 12:35:23,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d2403f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:35:23, skipping insertion in model container [2020-12-03 12:35:23,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:23" (3/3) ... [2020-12-03 12:35:23,395 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-12-03 12:35:23,409 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:35:23,412 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-12-03 12:35:23,424 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-12-03 12:35:23,443 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:35:23,444 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-03 12:35:23,444 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:35:23,444 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:35:23,444 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:35:23,444 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:35:23,444 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:35:23,444 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:35:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-03 12:35:23,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:35:23,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:23,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:35:23,469 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:23,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:23,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2769752, now seen corresponding path program 1 times [2020-12-03 12:35:23,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:23,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793915180] [2020-12-03 12:35:23,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:23,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793915180] [2020-12-03 12:35:23,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:23,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:23,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883592370] [2020-12-03 12:35:23,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 12:35:23,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:23,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 12:35:23,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 12:35:23,659 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-03 12:35:23,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:23,674 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-03 12:35:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 12:35:23,675 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-03 12:35:23,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:23,685 INFO L225 Difference]: With dead ends: 24 [2020-12-03 12:35:23,685 INFO L226 Difference]: Without dead ends: 22 [2020-12-03 12:35:23,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 12:35:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-03 12:35:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-03 12:35:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-03 12:35:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-03 12:35:23,730 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 4 [2020-12-03 12:35:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:23,731 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-03 12:35:23,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 12:35:23,731 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-03 12:35:23,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:35:23,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:23,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:35:23,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:35:23,733 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:23,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:23,737 INFO L82 PathProgramCache]: Analyzing trace with hash 85184151, now seen corresponding path program 1 times [2020-12-03 12:35:23,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:23,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156693724] [2020-12-03 12:35:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:23,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156693724] [2020-12-03 12:35:23,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:23,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:35:23,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422347167] [2020-12-03 12:35:23,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:23,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:23,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:23,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:23,843 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 3 states. [2020-12-03 12:35:23,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:23,906 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-03 12:35:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:23,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-03 12:35:23,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:23,909 INFO L225 Difference]: With dead ends: 35 [2020-12-03 12:35:23,910 INFO L226 Difference]: Without dead ends: 34 [2020-12-03 12:35:23,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:23,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-03 12:35:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-12-03 12:35:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-03 12:35:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-12-03 12:35:23,920 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 5 [2020-12-03 12:35:23,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:23,921 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-12-03 12:35:23,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:23,921 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-12-03 12:35:23,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:35:23,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:23,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:35:23,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:35:23,924 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:23,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:23,927 INFO L82 PathProgramCache]: Analyzing trace with hash 85183265, now seen corresponding path program 1 times [2020-12-03 12:35:23,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:23,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660001461] [2020-12-03 12:35:23,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:23,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660001461] [2020-12-03 12:35:23,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:23,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:23,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023259433] [2020-12-03 12:35:24,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:24,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:24,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:24,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:24,009 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 3 states. [2020-12-03 12:35:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:24,044 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-12-03 12:35:24,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:24,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-03 12:35:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:24,047 INFO L225 Difference]: With dead ends: 32 [2020-12-03 12:35:24,047 INFO L226 Difference]: Without dead ends: 31 [2020-12-03 12:35:24,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-03 12:35:24,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2020-12-03 12:35:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-03 12:35:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-03 12:35:24,057 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 5 [2020-12-03 12:35:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:24,058 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-03 12:35:24,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-03 12:35:24,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:35:24,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:24,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:35:24,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:35:24,060 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:24,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:24,061 INFO L82 PathProgramCache]: Analyzing trace with hash 85184580, now seen corresponding path program 1 times [2020-12-03 12:35:24,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:24,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646879871] [2020-12-03 12:35:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:24,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646879871] [2020-12-03 12:35:24,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:24,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:24,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594437517] [2020-12-03 12:35:24,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:24,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:24,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:24,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:24,117 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 3 states. [2020-12-03 12:35:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:24,146 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-03 12:35:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:24,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-03 12:35:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:24,148 INFO L225 Difference]: With dead ends: 22 [2020-12-03 12:35:24,148 INFO L226 Difference]: Without dead ends: 22 [2020-12-03 12:35:24,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:24,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-03 12:35:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-03 12:35:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-03 12:35:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-03 12:35:24,152 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 5 [2020-12-03 12:35:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:24,156 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-03 12:35:24,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-03 12:35:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:35:24,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:24,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:35:24,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-03 12:35:24,160 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:24,160 INFO L82 PathProgramCache]: Analyzing trace with hash 85184581, now seen corresponding path program 1 times [2020-12-03 12:35:24,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:24,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032690633] [2020-12-03 12:35:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:24,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032690633] [2020-12-03 12:35:24,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:24,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:24,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170982135] [2020-12-03 12:35:24,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:24,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:24,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:24,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:24,261 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 3 states. [2020-12-03 12:35:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:24,289 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-03 12:35:24,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:24,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-03 12:35:24,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:24,292 INFO L225 Difference]: With dead ends: 20 [2020-12-03 12:35:24,292 INFO L226 Difference]: Without dead ends: 20 [2020-12-03 12:35:24,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:24,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-03 12:35:24,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-03 12:35:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-03 12:35:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-03 12:35:24,302 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 5 [2020-12-03 12:35:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:24,302 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-03 12:35:24,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-03 12:35:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:24,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:24,304 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:24,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-03 12:35:24,304 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:24,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:24,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1800659432, now seen corresponding path program 1 times [2020-12-03 12:35:24,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:24,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531547793] [2020-12-03 12:35:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:24,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531547793] [2020-12-03 12:35:24,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:24,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:35:24,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044417782] [2020-12-03 12:35:24,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:35:24,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:24,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:35:24,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:24,395 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-12-03 12:35:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:24,476 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-12-03 12:35:24,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:35:24,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 12:35:24,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:24,477 INFO L225 Difference]: With dead ends: 33 [2020-12-03 12:35:24,477 INFO L226 Difference]: Without dead ends: 33 [2020-12-03 12:35:24,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-03 12:35:24,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2020-12-03 12:35:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-03 12:35:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-03 12:35:24,480 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 10 [2020-12-03 12:35:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:24,481 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-03 12:35:24,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:35:24,481 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-03 12:35:24,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:24,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:24,481 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:24,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-03 12:35:24,482 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:24,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:24,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1800660318, now seen corresponding path program 1 times [2020-12-03 12:35:24,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:24,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855626941] [2020-12-03 12:35:24,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:24,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855626941] [2020-12-03 12:35:24,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:24,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:24,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048291349] [2020-12-03 12:35:24,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:35:24,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:24,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:35:24,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:24,540 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-12-03 12:35:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:24,597 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-03 12:35:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:35:24,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 12:35:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:24,599 INFO L225 Difference]: With dead ends: 25 [2020-12-03 12:35:24,599 INFO L226 Difference]: Without dead ends: 25 [2020-12-03 12:35:24,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:24,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-03 12:35:24,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-12-03 12:35:24,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-03 12:35:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-03 12:35:24,604 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2020-12-03 12:35:24,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:24,604 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-03 12:35:24,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:35:24,604 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-03 12:35:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:24,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:24,605 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:24,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-03 12:35:24,607 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:24,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1800660317, now seen corresponding path program 1 times [2020-12-03 12:35:24,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:24,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864457845] [2020-12-03 12:35:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:24,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864457845] [2020-12-03 12:35:24,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:24,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:24,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906835292] [2020-12-03 12:35:24,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:35:24,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:24,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:35:24,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:24,712 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-12-03 12:35:24,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:24,772 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-03 12:35:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:35:24,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 12:35:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:24,774 INFO L225 Difference]: With dead ends: 28 [2020-12-03 12:35:24,774 INFO L226 Difference]: Without dead ends: 28 [2020-12-03 12:35:24,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:24,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-03 12:35:24,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-12-03 12:35:24,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-03 12:35:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-03 12:35:24,783 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2020-12-03 12:35:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:24,784 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-03 12:35:24,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:35:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-03 12:35:24,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-03 12:35:24,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:24,785 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:24,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-03 12:35:24,786 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:24,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:24,787 INFO L82 PathProgramCache]: Analyzing trace with hash 437255107, now seen corresponding path program 1 times [2020-12-03 12:35:24,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:24,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539854990] [2020-12-03 12:35:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:24,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539854990] [2020-12-03 12:35:24,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:24,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-03 12:35:24,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637729644] [2020-12-03 12:35:24,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:35:24,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:24,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:35:24,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:24,878 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-12-03 12:35:24,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:24,949 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-12-03 12:35:24,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:35:24,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-03 12:35:24,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:24,952 INFO L225 Difference]: With dead ends: 26 [2020-12-03 12:35:24,952 INFO L226 Difference]: Without dead ends: 26 [2020-12-03 12:35:24,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:35:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-03 12:35:24,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-12-03 12:35:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-03 12:35:24,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-03 12:35:24,961 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 12 [2020-12-03 12:35:24,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:24,962 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-03 12:35:24,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:35:24,962 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-03 12:35:24,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-03 12:35:24,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:24,963 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:24,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-03 12:35:24,964 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:24,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:24,964 INFO L82 PathProgramCache]: Analyzing trace with hash -704469817, now seen corresponding path program 1 times [2020-12-03 12:35:24,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:24,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194068745] [2020-12-03 12:35:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:35:24,986 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:35:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:35:25,010 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:35:25,039 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:35:25,039 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:35:25,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-03 12:35:25,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:35:25 BoogieIcfgContainer [2020-12-03 12:35:25,085 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:35:25,085 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:35:25,085 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:35:25,086 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:35:25,086 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:23" (3/4) ... [2020-12-03 12:35:25,088 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-03 12:35:25,088 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:35:25,090 INFO L168 Benchmark]: Toolchain (without parser) took 2776.92 ms. Allocated memory is still 107.0 MB. Free memory was 74.2 MB in the beginning and 40.3 MB in the end (delta: 33.9 MB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:25,090 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 79.7 MB. Free memory was 40.6 MB in the beginning and 40.5 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:35:25,091 INFO L168 Benchmark]: CACSL2BoogieTranslator took 534.04 ms. Allocated memory is still 107.0 MB. Free memory was 74.0 MB in the beginning and 71.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:25,091 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.66 ms. Allocated memory is still 107.0 MB. Free memory was 71.8 MB in the beginning and 70.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:25,092 INFO L168 Benchmark]: Boogie Preprocessor took 52.51 ms. Allocated memory is still 107.0 MB. Free memory was 70.2 MB in the beginning and 68.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:35:25,092 INFO L168 Benchmark]: RCFGBuilder took 423.53 ms. Allocated memory is still 107.0 MB. Free memory was 68.7 MB in the beginning and 48.2 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:25,093 INFO L168 Benchmark]: TraceAbstraction took 1696.39 ms. Allocated memory is still 107.0 MB. Free memory was 47.7 MB in the beginning and 40.3 MB in the end (delta: 7.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:25,093 INFO L168 Benchmark]: Witness Printer took 2.95 ms. Allocated memory is still 107.0 MB. Free memory is still 40.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:35:25,095 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 79.7 MB. Free memory was 40.6 MB in the beginning and 40.5 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 534.04 ms. Allocated memory is still 107.0 MB. Free memory was 74.0 MB in the beginning and 71.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.66 ms. Allocated memory is still 107.0 MB. Free memory was 71.8 MB in the beginning and 70.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.51 ms. Allocated memory is still 107.0 MB. Free memory was 70.2 MB in the beginning and 68.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 423.53 ms. Allocated memory is still 107.0 MB. Free memory was 68.7 MB in the beginning and 48.2 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1696.39 ms. Allocated memory is still 107.0 MB. Free memory was 47.7 MB in the beginning and 40.3 MB in the end (delta: 7.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Witness Printer took 2.95 ms. Allocated memory is still 107.0 MB. Free memory is still 40.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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; [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND FALSE !(p!=0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 138 SDtfs, 156 SDslu, 63 SDs, 0 SdLazy, 149 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 37 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 1835 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:35:27,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:35:27,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:35:27,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:35:27,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:35:27,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:35:27,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:35:27,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:35:27,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:35:27,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:35:27,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:35:27,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:35:27,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:35:27,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:35:27,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:35:27,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:35:27,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:35:27,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:35:27,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:35:27,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:35:27,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:35:27,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:35:27,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:35:27,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:35:27,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:35:27,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:35:27,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:35:27,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:35:27,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:35:27,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:35:27,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:35:27,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:35:27,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:35:27,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:35:27,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:35:27,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:35:27,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:35:27,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:35:27,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:35:27,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:35:27,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:35:27,871 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-12-03 12:35:27,916 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:35:27,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:35:27,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:35:27,919 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:35:27,920 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:35:27,920 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:35:27,920 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:35:27,920 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:35:27,921 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:35:27,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 12:35:27,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 12:35:27,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:35:27,924 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:35:27,924 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:35:27,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:35:27,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:35:27,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:35:27,925 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-03 12:35:27,925 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-03 12:35:27,926 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-03 12:35:27,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:35:27,926 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:35:27,926 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-03 12:35:27,927 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-03 12:35:27,927 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:35:27,927 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:35:27,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:35:27,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 12:35:27,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:35:27,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:35:27,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:35:27,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:35:27,929 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-03 12:35:27,929 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-03 12:35:27,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:35:27,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:35:27,930 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:/tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2020-12-03 12:35:28,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:35:28,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:35:28,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:35:28,334 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:35:28,337 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:35:28,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-12-03 12:35:28,400 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/data/f74d9e06d/670658504abe449d99444ccdafef94c3/FLAG8611f6661 [2020-12-03 12:35:29,043 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:35:29,047 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-12-03 12:35:29,062 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/data/f74d9e06d/670658504abe449d99444ccdafef94c3/FLAG8611f6661 [2020-12-03 12:35:29,312 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/data/f74d9e06d/670658504abe449d99444ccdafef94c3 [2020-12-03 12:35:29,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:35:29,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:35:29,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:35:29,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:35:29,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:35:29,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:35:29" (1/1) ... [2020-12-03 12:35:29,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e39510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:29, skipping insertion in model container [2020-12-03 12:35:29,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:35:29" (1/1) ... [2020-12-03 12:35:29,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:35:29,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:35:29,702 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2020-12-03 12:35:29,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:35:29,738 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:35:29,805 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2020-12-03 12:35:29,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:35:29,868 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:35:29,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:29 WrapperNode [2020-12-03 12:35:29,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:35:29,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:35:29,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:35:29,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:35:29,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:29" (1/1) ... [2020-12-03 12:35:29,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:29" (1/1) ... [2020-12-03 12:35:29,912 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:35:29,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:35:29,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:35:29,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:35:29,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:29" (1/1) ... [2020-12-03 12:35:29,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:29" (1/1) ... [2020-12-03 12:35:29,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:29" (1/1) ... [2020-12-03 12:35:29,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:29" (1/1) ... [2020-12-03 12:35:29,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:29" (1/1) ... [2020-12-03 12:35:29,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:29" (1/1) ... [2020-12-03 12:35:29,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:29" (1/1) ... [2020-12-03 12:35:29,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:35:29,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:35:29,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:35:29,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:35:29,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:35:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-03 12:35:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-03 12:35:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-03 12:35:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:35:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-03 12:35:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-03 12:35:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-03 12:35:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:35:30,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:35:30,479 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:35:30,479 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-03 12:35:30,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:30 BoogieIcfgContainer [2020-12-03 12:35:30,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:35:30,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:35:30,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:35:30,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:35:30,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:35:29" (1/3) ... [2020-12-03 12:35:30,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656c9cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:35:30, skipping insertion in model container [2020-12-03 12:35:30,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:29" (2/3) ... [2020-12-03 12:35:30,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656c9cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:35:30, skipping insertion in model container [2020-12-03 12:35:30,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:30" (3/3) ... [2020-12-03 12:35:30,489 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-12-03 12:35:30,503 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:35:30,507 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-12-03 12:35:30,519 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-12-03 12:35:30,552 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:35:30,552 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-03 12:35:30,552 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:35:30,552 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:35:30,553 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:35:30,553 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:35:30,553 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:35:30,553 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:35:30,572 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-03 12:35:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:35:30,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:30,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:35:30,580 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:30,585 INFO L82 PathProgramCache]: Analyzing trace with hash 28698492, now seen corresponding path program 1 times [2020-12-03 12:35:30,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:35:30,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935246408] [2020-12-03 12:35:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-03 12:35:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:30,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-03 12:35:30,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:30,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:35:30,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935246408] [2020-12-03 12:35:30,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:30,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:30,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972486283] [2020-12-03 12:35:30,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:30,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:35:30,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:30,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:30,855 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-12-03 12:35:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:30,980 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-12-03 12:35:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:30,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-03 12:35:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:31,003 INFO L225 Difference]: With dead ends: 40 [2020-12-03 12:35:31,003 INFO L226 Difference]: Without dead ends: 36 [2020-12-03 12:35:31,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:31,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-03 12:35:31,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-12-03 12:35:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-03 12:35:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-03 12:35:31,039 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 5 [2020-12-03 12:35:31,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:31,040 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-03 12:35:31,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:31,040 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-03 12:35:31,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:35:31,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:31,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:35:31,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-03 12:35:31,257 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:31,258 INFO L82 PathProgramCache]: Analyzing trace with hash 28698536, now seen corresponding path program 1 times [2020-12-03 12:35:31,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:35:31,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912569869] [2020-12-03 12:35:31,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-03 12:35:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:31,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 12:35:31,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:31,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:35:31,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912569869] [2020-12-03 12:35:31,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:31,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:31,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69374055] [2020-12-03 12:35:31,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:31,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:35:31,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:31,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:31,424 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2020-12-03 12:35:31,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:31,477 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-03 12:35:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:31,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-03 12:35:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:31,479 INFO L225 Difference]: With dead ends: 34 [2020-12-03 12:35:31,479 INFO L226 Difference]: Without dead ends: 33 [2020-12-03 12:35:31,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-03 12:35:31,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-12-03 12:35:31,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-03 12:35:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-03 12:35:31,484 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 5 [2020-12-03 12:35:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:31,484 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-03 12:35:31,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:31,484 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-03 12:35:31,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:35:31,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:31,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:35:31,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-03 12:35:31,708 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:31,709 INFO L82 PathProgramCache]: Analyzing trace with hash 28699851, now seen corresponding path program 1 times [2020-12-03 12:35:31,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:35:31,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361267629] [2020-12-03 12:35:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-03 12:35:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:31,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 12:35:31,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:31,867 INFO L382 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 [2020-12-03 12:35:31,868 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 12:35:31,872 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:35:31,873 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-03 12:35:31,873 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-03 12:35:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:31,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:35:31,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361267629] [2020-12-03 12:35:31,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:31,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:31,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452206897] [2020-12-03 12:35:31,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:31,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:35:31,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:31,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:31,890 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 3 states. [2020-12-03 12:35:31,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:31,958 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-12-03 12:35:31,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:31,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-03 12:35:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:31,959 INFO L225 Difference]: With dead ends: 23 [2020-12-03 12:35:31,960 INFO L226 Difference]: Without dead ends: 23 [2020-12-03 12:35:31,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-03 12:35:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-03 12:35:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-03 12:35:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-03 12:35:31,963 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 5 [2020-12-03 12:35:31,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:31,964 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-03 12:35:31,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:31,964 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-03 12:35:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:35:31,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:31,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:35:32,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-03 12:35:32,183 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:32,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:32,184 INFO L82 PathProgramCache]: Analyzing trace with hash 28699852, now seen corresponding path program 1 times [2020-12-03 12:35:32,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:35:32,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232616272] [2020-12-03 12:35:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-03 12:35:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:32,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 12:35:32,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:32,313 INFO L382 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 [2020-12-03 12:35:32,321 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 12:35:32,331 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:35:32,334 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-03 12:35:32,334 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:11 [2020-12-03 12:35:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:32,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:35:32,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232616272] [2020-12-03 12:35:32,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:32,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:32,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833907533] [2020-12-03 12:35:32,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:32,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:35:32,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:32,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:32,367 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 3 states. [2020-12-03 12:35:32,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:32,437 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-12-03 12:35:32,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:32,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-03 12:35:32,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:32,439 INFO L225 Difference]: With dead ends: 21 [2020-12-03 12:35:32,439 INFO L226 Difference]: Without dead ends: 21 [2020-12-03 12:35:32,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:32,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-03 12:35:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-03 12:35:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-03 12:35:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-03 12:35:32,443 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 5 [2020-12-03 12:35:32,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:32,443 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-03 12:35:32,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-03 12:35:32,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:32,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:32,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:32,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-03 12:35:32,644 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:32,645 INFO L82 PathProgramCache]: Analyzing trace with hash -653129230, now seen corresponding path program 1 times [2020-12-03 12:35:32,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:35:32,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754294214] [2020-12-03 12:35:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-03 12:35:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:32,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 12:35:32,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:32,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:35:32,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754294214] [2020-12-03 12:35:32,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:32,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:35:32,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453058028] [2020-12-03 12:35:32,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:35:32,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:35:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:35:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:32,803 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-12-03 12:35:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:32,953 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-03 12:35:32,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:35:32,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 12:35:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:32,958 INFO L225 Difference]: With dead ends: 36 [2020-12-03 12:35:32,959 INFO L226 Difference]: Without dead ends: 36 [2020-12-03 12:35:32,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:32,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-03 12:35:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2020-12-03 12:35:32,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-03 12:35:32,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-03 12:35:32,978 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-12-03 12:35:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:32,978 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-03 12:35:32,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:35:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-03 12:35:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:32,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:32,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:33,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-03 12:35:33,199 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:33,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:33,199 INFO L82 PathProgramCache]: Analyzing trace with hash -653129186, now seen corresponding path program 1 times [2020-12-03 12:35:33,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:35:33,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707841969] [2020-12-03 12:35:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-03 12:35:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:33,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 12:35:33,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:33,299 INFO L382 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 [2020-12-03 12:35:33,300 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 12:35:33,303 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:35:33,303 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-03 12:35:33,303 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-03 12:35:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:33,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:35:33,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707841969] [2020-12-03 12:35:33,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:33,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:33,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725538390] [2020-12-03 12:35:33,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:35:33,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:35:33,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:35:33,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:33,338 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2020-12-03 12:35:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:33,475 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-12-03 12:35:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:35:33,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 12:35:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:33,476 INFO L225 Difference]: With dead ends: 27 [2020-12-03 12:35:33,476 INFO L226 Difference]: Without dead ends: 27 [2020-12-03 12:35:33,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-03 12:35:33,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-12-03 12:35:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-03 12:35:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-03 12:35:33,480 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2020-12-03 12:35:33,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:33,480 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-03 12:35:33,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:35:33,480 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-03 12:35:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:33,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:33,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:33,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-03 12:35:33,694 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:33,695 INFO L82 PathProgramCache]: Analyzing trace with hash -653129185, now seen corresponding path program 1 times [2020-12-03 12:35:33,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:35:33,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558034045] [2020-12-03 12:35:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-03 12:35:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 12:35:33,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:33,773 INFO L382 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 [2020-12-03 12:35:33,774 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 12:35:33,780 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:35:33,782 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-03 12:35:33,782 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:11 [2020-12-03 12:35:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:33,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:35:33,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558034045] [2020-12-03 12:35:33,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:33,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:33,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934936139] [2020-12-03 12:35:33,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:35:33,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:35:33,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:35:33,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:33,848 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-12-03 12:35:33,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:33,982 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-03 12:35:33,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:35:33,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 12:35:33,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:33,983 INFO L225 Difference]: With dead ends: 31 [2020-12-03 12:35:33,983 INFO L226 Difference]: Without dead ends: 31 [2020-12-03 12:35:33,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:33,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-03 12:35:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2020-12-03 12:35:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-03 12:35:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-03 12:35:33,986 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2020-12-03 12:35:33,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:33,987 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-03 12:35:33,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:35:33,987 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-03 12:35:33,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-03 12:35:33,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:33,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:34,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-03 12:35:34,188 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:34,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash -591922145, now seen corresponding path program 1 times [2020-12-03 12:35:34,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:35:34,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358998305] [2020-12-03 12:35:34,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-03 12:35:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:34,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:35:34,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:34,276 INFO L382 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 [2020-12-03 12:35:34,277 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 12:35:34,280 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:35:34,280 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-03 12:35:34,281 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-03 12:35:34,316 INFO L348 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-12-03 12:35:34,317 INFO L382 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 29 treesize of output 13 [2020-12-03 12:35:34,319 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 12:35:34,322 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:35:34,323 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-03 12:35:34,323 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:9 [2020-12-03 12:35:34,346 INFO L382 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 [2020-12-03 12:35:34,349 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 12:35:34,351 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:35:34,352 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-03 12:35:34,352 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-03 12:35:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:34,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 12:35:34,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358998305] [2020-12-03 12:35:34,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:34,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-03 12:35:34,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24152099] [2020-12-03 12:35:34,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:35:34,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-03 12:35:34,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:35:34,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:34,366 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-12-03 12:35:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:34,537 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-03 12:35:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:35:34,539 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-03 12:35:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:34,539 INFO L225 Difference]: With dead ends: 28 [2020-12-03 12:35:34,540 INFO L226 Difference]: Without dead ends: 28 [2020-12-03 12:35:34,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:35:34,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-03 12:35:34,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-12-03 12:35:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-03 12:35:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-03 12:35:34,543 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 12 [2020-12-03 12:35:34,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:34,544 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-03 12:35:34,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:35:34,544 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-03 12:35:34,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-03 12:35:34,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:34,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:34,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-03 12:35:34,763 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:34,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:34,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1187913323, now seen corresponding path program 1 times [2020-12-03 12:35:34,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-03 12:35:34,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701427734] [2020-12-03 12:35:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7f07331b-5554-4ba8-8f26-ed83e12ee48e/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-03 12:35:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:35:34,860 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:35:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:35:34,902 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:35:34,931 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-03 12:35:34,931 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:35:35,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-03 12:35:35,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:35:35 BoogieIcfgContainer [2020-12-03 12:35:35,164 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:35:35,165 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:35:35,165 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:35:35,165 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:35:35,166 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:30" (3/4) ... [2020-12-03 12:35:35,169 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-03 12:35:35,169 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:35:35,171 INFO L168 Benchmark]: Toolchain (without parser) took 5851.95 ms. Allocated memory was 48.2 MB in the beginning and 73.4 MB in the end (delta: 25.2 MB). Free memory was 22.2 MB in the beginning and 33.4 MB in the end (delta: -11.3 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:35,172 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 48.2 MB. Free memory is still 29.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:35:35,172 INFO L168 Benchmark]: CACSL2BoogieTranslator took 548.73 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 22.0 MB in the beginning and 31.6 MB in the end (delta: -9.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:35,175 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.76 ms. Allocated memory is still 60.8 MB. Free memory was 31.4 MB in the beginning and 29.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:35,177 INFO L168 Benchmark]: Boogie Preprocessor took 35.91 ms. Allocated memory is still 60.8 MB. Free memory was 29.7 MB in the beginning and 43.0 MB in the end (delta: -13.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:35,182 INFO L168 Benchmark]: RCFGBuilder took 531.26 ms. Allocated memory is still 60.8 MB. Free memory was 43.0 MB in the beginning and 40.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:35,184 INFO L168 Benchmark]: TraceAbstraction took 4681.44 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 40.1 MB in the beginning and 33.4 MB in the end (delta: 6.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. [2020-12-03 12:35:35,184 INFO L168 Benchmark]: Witness Printer took 4.82 ms. Allocated memory is still 73.4 MB. Free memory is still 33.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:35:35,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 48.2 MB. Free memory is still 29.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 548.73 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 22.0 MB in the beginning and 31.6 MB in the end (delta: -9.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.76 ms. Allocated memory is still 60.8 MB. Free memory was 31.4 MB in the beginning and 29.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.91 ms. Allocated memory is still 60.8 MB. Free memory was 29.7 MB in the beginning and 43.0 MB in the end (delta: -13.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 531.26 ms. Allocated memory is still 60.8 MB. Free memory was 43.0 MB in the beginning and 40.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4681.44 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 40.1 MB in the beginning and 33.4 MB in the end (delta: 6.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. * Witness Printer took 4.82 ms. Allocated memory is still 73.4 MB. Free memory is still 33.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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; [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND FALSE !(p!=0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 27 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 119 SDtfs, 176 SDslu, 58 SDs, 0 SdLazy, 179 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1976 SizeOfPredicates, 16 NumberOfNonLiveVariables, 320 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 4/4 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 Received shutdown request...