./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b85925b4cd4a90c7937c0d7134475db048f88e78d985bef01499b1b0477a4b80 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:16:42,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:16:42,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:16:42,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:16:42,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:16:42,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:16:42,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:16:42,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:16:42,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:16:42,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:16:42,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:16:42,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:16:42,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:16:42,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:16:42,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:16:42,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:16:42,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:16:42,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:16:42,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:16:42,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:16:42,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:16:42,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:16:42,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:16:42,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:16:42,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:16:42,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:16:42,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:16:42,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:16:42,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:16:42,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:16:42,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:16:42,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:16:42,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:16:42,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:16:42,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:16:42,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:16:42,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:16:42,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:16:42,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:16:42,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:16:42,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:16:42,873 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-07 08:16:42,900 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:16:42,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:16:42,901 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:16:42,901 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:16:42,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:16:42,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:16:42,903 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:16:42,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:16:42,904 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:16:42,904 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 08:16:42,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:16:42,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:16:42,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:16:42,912 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 08:16:42,912 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 08:16:42,912 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 08:16:42,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:16:42,913 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 08:16:42,913 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:16:42,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:16:42,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:16:42,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:16:42,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:16:42,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:16:42,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:16:42,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:16:42,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:16:42,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:16:42,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:16:42,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b85925b4cd4a90c7937c0d7134475db048f88e78d985bef01499b1b0477a4b80 [2021-11-07 08:16:43,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:16:43,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:16:43,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:16:43,300 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:16:43,302 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:16:43,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i [2021-11-07 08:16:43,394 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/data/4b3abe842/904d967632b046d3bca411b82aeae707/FLAGe60ab1dac [2021-11-07 08:16:43,997 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:16:43,998 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i [2021-11-07 08:16:44,015 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/data/4b3abe842/904d967632b046d3bca411b82aeae707/FLAGe60ab1dac [2021-11-07 08:16:44,301 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/data/4b3abe842/904d967632b046d3bca411b82aeae707 [2021-11-07 08:16:44,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:16:44,305 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 08:16:44,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:16:44,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:16:44,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:16:44,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:16:44" (1/1) ... [2021-11-07 08:16:44,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@758eebd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:16:44, skipping insertion in model container [2021-11-07 08:16:44,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:16:44" (1/1) ... [2021-11-07 08:16:44,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:16:44,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:16:44,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:16:44,783 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 08:16:44,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2b393c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:16:44, skipping insertion in model container [2021-11-07 08:16:44,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:16:44,784 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-07 08:16:44,790 INFO L168 Benchmark]: Toolchain (without parser) took 481.97 ms. Allocated memory was 88.1 MB in the beginning and 123.7 MB in the end (delta: 35.7 MB). Free memory was 56.4 MB in the beginning and 97.9 MB in the end (delta: -41.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 08:16:44,797 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 88.1 MB. Free memory is still 47.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:16:44,799 INFO L168 Benchmark]: CACSL2BoogieTranslator took 477.50 ms. Allocated memory was 88.1 MB in the beginning and 123.7 MB in the end (delta: 35.7 MB). Free memory was 56.2 MB in the beginning and 98.3 MB in the end (delta: -42.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 08:16:44,801 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 88.1 MB. Free memory is still 47.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 477.50 ms. Allocated memory was 88.1 MB in the beginning and 123.7 MB in the end (delta: 35.7 MB). Free memory was 56.2 MB in the beginning and 98.3 MB in the end (delta: -42.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 562]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b85925b4cd4a90c7937c0d7134475db048f88e78d985bef01499b1b0477a4b80 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:16:47,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:16:47,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:16:47,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:16:47,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:16:47,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:16:47,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:16:47,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:16:47,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:16:47,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:16:47,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:16:47,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:16:47,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:16:47,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:16:47,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:16:47,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:16:47,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:16:47,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:16:47,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:16:47,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:16:47,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:16:47,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:16:47,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:16:47,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:16:47,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:16:47,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:16:47,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:16:47,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:16:47,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:16:47,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:16:47,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:16:47,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:16:47,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:16:47,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:16:47,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:16:47,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:16:47,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:16:47,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:16:47,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:16:47,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:16:47,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:16:47,608 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-07 08:16:47,660 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:16:47,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:16:47,661 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:16:47,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:16:47,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:16:47,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:16:47,665 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:16:47,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:16:47,665 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:16:47,666 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 08:16:47,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:16:47,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:16:47,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:16:47,668 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 08:16:47,668 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 08:16:47,669 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 08:16:47,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:16:47,669 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 08:16:47,669 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 08:16:47,669 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 08:16:47,670 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:16:47,670 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:16:47,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:16:47,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:16:47,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:16:47,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:16:47,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:16:47,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:16:47,672 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-07 08:16:47,672 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 08:16:47,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:16:47,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 08:16:47,673 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_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b85925b4cd4a90c7937c0d7134475db048f88e78d985bef01499b1b0477a4b80 [2021-11-07 08:16:48,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:16:48,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:16:48,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:16:48,298 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:16:48,299 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:16:48,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i [2021-11-07 08:16:48,399 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/data/0fcdc51b1/87a8dfd799af4906959fa6cdc926cc65/FLAG37a693e7f [2021-11-07 08:16:49,192 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:16:49,193 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i [2021-11-07 08:16:49,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/data/0fcdc51b1/87a8dfd799af4906959fa6cdc926cc65/FLAG37a693e7f [2021-11-07 08:16:49,437 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/data/0fcdc51b1/87a8dfd799af4906959fa6cdc926cc65 [2021-11-07 08:16:49,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:16:49,444 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 08:16:49,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:16:49,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:16:49,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:16:49,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:16:49" (1/1) ... [2021-11-07 08:16:49,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f93a260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:16:49, skipping insertion in model container [2021-11-07 08:16:49,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:16:49" (1/1) ... [2021-11-07 08:16:49,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:16:49,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:16:49,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:16:49,941 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 08:16:49,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:16:49,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:16:49,987 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:16:50,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:16:50,111 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:16:50,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:16:50 WrapperNode [2021-11-07 08:16:50,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:16:50,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:16:50,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:16:50,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:16:50,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:16:50" (1/1) ... [2021-11-07 08:16:50,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:16:50" (1/1) ... [2021-11-07 08:16:50,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:16:50" (1/1) ... [2021-11-07 08:16:50,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:16:50" (1/1) ... [2021-11-07 08:16:50,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:16:50" (1/1) ... [2021-11-07 08:16:50,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:16:50" (1/1) ... [2021-11-07 08:16:50,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:16:50" (1/1) ... [2021-11-07 08:16:50,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:16:50,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:16:50,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:16:50,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:16:50,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:16:50" (1/1) ... [2021-11-07 08:16:50,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:16:50,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:16:50,256 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:16:50,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:16:50,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 08:16:50,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:16:50,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 08:16:50,314 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-07 08:16:50,314 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-07 08:16:50,316 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-07 08:16:50,316 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2021-11-07 08:16:50,317 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 08:16:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-07 08:16:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-07 08:16:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 08:16:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 08:16:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 08:16:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 08:16:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 08:16:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 08:16:50,318 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 08:16:50,318 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 08:16:50,318 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 08:16:50,318 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 08:16:50,318 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 08:16:50,318 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 08:16:50,319 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 08:16:50,321 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 08:16:50,321 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 08:16:50,321 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 08:16:50,322 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 08:16:50,322 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 08:16:50,322 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 08:16:50,323 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 08:16:50,323 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 08:16:50,323 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 08:16:50,323 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 08:16:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 08:16:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 08:16:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 08:16:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 08:16:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 08:16:50,325 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 08:16:50,325 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 08:16:50,325 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 08:16:50,325 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 08:16:50,326 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 08:16:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 08:16:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 08:16:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 08:16:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 08:16:50,328 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 08:16:50,329 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 08:16:50,329 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 08:16:50,329 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 08:16:50,330 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 08:16:50,330 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 08:16:50,330 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 08:16:50,330 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 08:16:50,330 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 08:16:50,331 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 08:16:50,331 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 08:16:50,331 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 08:16:50,332 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 08:16:50,332 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 08:16:50,332 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 08:16:50,334 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 08:16:50,334 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 08:16:50,335 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-07 08:16:50,336 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 08:16:50,336 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 08:16:50,336 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 08:16:50,336 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 08:16:50,336 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 08:16:50,337 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 08:16:50,337 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 08:16:50,337 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 08:16:50,338 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 08:16:50,338 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 08:16:50,338 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 08:16:50,338 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 08:16:50,338 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 08:16:50,339 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 08:16:50,340 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 08:16:50,340 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 08:16:50,340 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 08:16:50,340 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 08:16:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 08:16:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 08:16:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 08:16:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 08:16:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 08:16:50,342 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 08:16:50,342 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 08:16:50,342 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 08:16:50,342 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 08:16:50,342 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 08:16:50,343 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 08:16:50,343 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 08:16:50,343 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 08:16:50,344 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 08:16:50,344 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 08:16:50,344 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 08:16:50,357 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 08:16:50,357 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 08:16:50,358 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 08:16:50,358 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 08:16:50,358 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 08:16:50,358 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 08:16:50,358 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 08:16:50,359 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 08:16:50,359 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 08:16:50,359 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 08:16:50,359 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 08:16:50,359 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 08:16:50,360 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 08:16:50,360 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 08:16:50,360 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-07 08:16:50,360 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2021-11-07 08:16:50,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:16:50,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 08:16:50,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 08:16:50,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 08:16:50,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:16:50,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 08:16:50,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:16:50,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 08:16:50,711 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-07 08:16:50,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:16:50,985 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-07 08:16:50,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:16:50 BoogieIcfgContainer [2021-11-07 08:16:50,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:16:50,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:16:50,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:16:50,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:16:50,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:16:49" (1/3) ... [2021-11-07 08:16:51,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ab982b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:16:51, skipping insertion in model container [2021-11-07 08:16:51,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:16:50" (2/3) ... [2021-11-07 08:16:51,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ab982b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:16:51, skipping insertion in model container [2021-11-07 08:16:51,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:16:50" (3/3) ... [2021-11-07 08:16:51,012 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_shallow_copy-1.i [2021-11-07 08:16:51,020 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:16:51,020 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-07 08:16:51,084 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:16:51,095 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:16:51,095 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-07 08:16:51,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 39 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 08:16:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 08:16:51,154 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:51,155 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:51,155 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-07 08:16:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:51,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1901459912, now seen corresponding path program 1 times [2021-11-07 08:16:51,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:16:51,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262569757] [2021-11-07 08:16:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:51,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:16:51,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:16:51,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:16:51,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 08:16:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:51,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:16:51,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:16:51,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:16:51,855 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 08:16:51,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 26 [2021-11-07 08:16:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:16:51,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:16:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:16:52,380 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:16:52,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262569757] [2021-11-07 08:16:52,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262569757] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:16:52,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:16:52,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-11-07 08:16:52,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807584538] [2021-11-07 08:16:52,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:16:52,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:16:52,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:16:52,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:16:52,412 INFO L87 Difference]: Start difference. First operand has 48 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 39 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 08:16:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:53,007 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-11-07 08:16:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:16:53,010 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2021-11-07 08:16:53,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:53,018 INFO L225 Difference]: With dead ends: 44 [2021-11-07 08:16:53,018 INFO L226 Difference]: Without dead ends: 38 [2021-11-07 08:16:53,019 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:16:53,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-07 08:16:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-11-07 08:16:53,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 30 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 08:16:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-11-07 08:16:53,061 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 19 [2021-11-07 08:16:53,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:53,063 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-11-07 08:16:53,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 08:16:53,063 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-11-07 08:16:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 08:16:53,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:53,065 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:53,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 08:16:53,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:16:53,285 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-07 08:16:53,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:53,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1901459911, now seen corresponding path program 1 times [2021-11-07 08:16:53,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:16:53,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191990737] [2021-11-07 08:16:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:53,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:16:53,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:16:53,288 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:16:53,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 08:16:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:53,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:16:53,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:16:53,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:16:53,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:16:53,878 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 08:16:53,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 36 treesize of output 38 [2021-11-07 08:16:53,894 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:16:53,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-07 08:16:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:16:53,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:17:00,779 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_main_~s~0.offset_BEFORE_CALL_2 (_ BitVec 32)) (v_main_~s~0.base_BEFORE_CALL_4 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) v_main_~s~0.offset_BEFORE_CALL_2))) (and (bvule .cse0 (select |c_#length| v_main_~s~0.base_BEFORE_CALL_4)) (bvule v_main_~s~0.offset_BEFORE_CALL_2 .cse0))) (exists ((v_alloc_node_~temp~0.base_15 (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) v_main_~s~0.offset_BEFORE_CALL_2))) (or (not (bvule .cse1 (select (store |c_old(#length)| v_alloc_node_~temp~0.base_15 (_ bv4 32)) v_main_~s~0.base_BEFORE_CALL_4))) (not (bvule v_main_~s~0.offset_BEFORE_CALL_2 .cse1)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_alloc_node_~temp~0.base_15))))))))))) is different from true [2021-11-07 08:17:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-07 08:17:08,992 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:17:08,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191990737] [2021-11-07 08:17:08,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191990737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:17:08,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:17:08,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-11-07 08:17:08,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083921658] [2021-11-07 08:17:08,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:17:08,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:17:08,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:17:08,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=4, NotChecked=26, Total=240 [2021-11-07 08:17:08,996 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:17:29,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:29,728 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-11-07 08:17:29,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:17:29,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 19 [2021-11-07 08:17:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:29,731 INFO L225 Difference]: With dead ends: 32 [2021-11-07 08:17:29,731 INFO L226 Difference]: Without dead ends: 32 [2021-11-07 08:17:29,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=69, Invalid=310, Unknown=5, NotChecked=36, Total=420 [2021-11-07 08:17:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-07 08:17:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-07 08:17:29,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 25 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 08:17:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-11-07 08:17:29,740 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 19 [2021-11-07 08:17:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:29,740 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-11-07 08:17:29,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:17:29,741 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-11-07 08:17:29,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:17:29,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:29,742 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:29,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 08:17:29,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:17:29,949 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr9ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-07 08:17:29,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:29,950 INFO L85 PathProgramCache]: Analyzing trace with hash 294926047, now seen corresponding path program 1 times [2021-11-07 08:17:29,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:17:29,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638757442] [2021-11-07 08:17:29,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:29,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:17:29,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:17:29,954 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:17:29,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 08:17:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:30,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:17:30,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:17:30,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:17:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:17:31,018 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:17:31,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638757442] [2021-11-07 08:17:31,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638757442] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:17:31,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:17:31,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-11-07 08:17:31,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423883890] [2021-11-07 08:17:31,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:17:31,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:17:31,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:17:31,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:17:31,022 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-07 08:17:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:31,394 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-11-07 08:17:31,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:17:31,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 27 [2021-11-07 08:17:31,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:31,397 INFO L225 Difference]: With dead ends: 32 [2021-11-07 08:17:31,397 INFO L226 Difference]: Without dead ends: 32 [2021-11-07 08:17:31,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:17:31,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-07 08:17:31,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-07 08:17:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 24 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 08:17:31,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-11-07 08:17:31,403 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 27 [2021-11-07 08:17:31,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:31,404 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-11-07 08:17:31,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-07 08:17:31,404 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-11-07 08:17:31,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:17:31,406 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:31,406 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:31,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:17:31,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:17:31,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr11ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-07 08:17:31,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash -43907359, now seen corresponding path program 1 times [2021-11-07 08:17:31,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:17:31,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494143329] [2021-11-07 08:17:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:31,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:17:31,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:17:31,611 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:17:31,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 08:17:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:17:31,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:31,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 08:17:31,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 08:17:32,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-07 08:17:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:17:32,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:17:32,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:17:32,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:17:32,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494143329] [2021-11-07 08:17:32,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494143329] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:32,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:32,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-11-07 08:17:32,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773725697] [2021-11-07 08:17:32,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:17:32,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:17:32,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:17:32,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:17:32,279 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:17:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:32,532 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-11-07 08:17:32,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:17:32,534 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-11-07 08:17:32,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:32,537 INFO L225 Difference]: With dead ends: 30 [2021-11-07 08:17:32,537 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 08:17:32,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:17:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 08:17:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-07 08:17:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 08:17:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-11-07 08:17:32,543 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 29 [2021-11-07 08:17:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:32,544 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-11-07 08:17:32,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:17:32,545 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-11-07 08:17:32,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 08:17:32,546 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:32,547 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:32,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:17:32,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:17:32,749 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-07 08:17:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:32,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1361128031, now seen corresponding path program 1 times [2021-11-07 08:17:32,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:17:32,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711242882] [2021-11-07 08:17:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:32,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:17:32,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:17:32,752 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:17:32,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 08:17:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:32,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:17:32,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:33,216 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:17:33,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711242882] [2021-11-07 08:17:33,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [alloc_node_~temp~0.base] [2021-11-07 08:17:33,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1924906975] [2021-11-07 08:17:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:33,217 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 08:17:33,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/cvc4 [2021-11-07 08:17:33,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 08:17:33,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 08:17:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:33,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:17:33,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:33,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 08:17:33,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 08:17:33,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-07 08:17:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:17:33,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:17:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:17:34,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1924906975] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:34,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:34,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-11-07 08:17:34,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418465249] [2021-11-07 08:17:34,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:17:34,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:17:34,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:17:34,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:17:34,179 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:17:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:34,725 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-11-07 08:17:34,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:17:34,726 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-11-07 08:17:34,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:34,727 INFO L225 Difference]: With dead ends: 29 [2021-11-07 08:17:34,727 INFO L226 Difference]: Without dead ends: 29 [2021-11-07 08:17:34,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:17:34,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-07 08:17:34,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-07 08:17:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 08:17:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-11-07 08:17:34,733 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 30 [2021-11-07 08:17:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:34,734 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-11-07 08:17:34,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:17:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-11-07 08:17:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 08:17:34,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:34,736 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:34,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:17:34,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:17:35,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:17:35,140 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-07 08:17:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:35,141 INFO L85 PathProgramCache]: Analyzing trace with hash 754704099, now seen corresponding path program 1 times [2021-11-07 08:17:35,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:17:35,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350580258] [2021-11-07 08:17:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:35,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:17:35,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:17:35,143 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:17:35,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 08:17:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:35,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:17:35,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:35,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:17:35,681 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 08:17:35,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2021-11-07 08:17:35,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 08:17:36,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-11-07 08:17:36,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-07 08:17:36,473 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-07 08:17:36,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 43 [2021-11-07 08:17:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:17:36,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:17:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:17:39,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:17:39,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350580258] [2021-11-07 08:17:39,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350580258] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:39,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:17:39,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 23 [2021-11-07 08:17:39,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221292394] [2021-11-07 08:17:39,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:17:39,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:17:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:17:39,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=484, Unknown=1, NotChecked=0, Total=552 [2021-11-07 08:17:39,559 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:17:40,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:40,282 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-11-07 08:17:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:17:40,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-11-07 08:17:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:40,294 INFO L225 Difference]: With dead ends: 28 [2021-11-07 08:17:40,294 INFO L226 Difference]: Without dead ends: 28 [2021-11-07 08:17:40,295 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=98, Invalid=657, Unknown=1, NotChecked=0, Total=756 [2021-11-07 08:17:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-07 08:17:40,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-07 08:17:40,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.0) internal successors, (21), 21 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 08:17:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-11-07 08:17:40,310 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 31 [2021-11-07 08:17:40,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:40,311 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-11-07 08:17:40,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:17:40,311 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-11-07 08:17:40,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 08:17:40,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:40,316 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:40,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:17:40,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:17:40,524 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr14ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 10 more)] === [2021-11-07 08:17:40,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:40,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1920990692, now seen corresponding path program 1 times [2021-11-07 08:17:40,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:17:40,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653191072] [2021-11-07 08:17:40,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:40,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:17:40,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:17:40,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:17:40,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 08:17:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:40,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 08:17:40,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:40,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:17:41,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-07 08:17:41,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2021-11-07 08:17:41,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-11-07 08:17:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:17:44,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:18:10,139 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_old(#valid)_BEFORE_CALL_3| (Array (_ BitVec 32) (_ BitVec 1))) (v_main_~s~0.base_BEFORE_CALL_10 (_ BitVec 32))) (let ((.cse0 (store |c_#valid| v_main_~s~0.base_BEFORE_CALL_10 (_ bv0 1)))) (or (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |c_alloc_node_#res.base|)))))) (_ bv1 1)))) (not (= |c_alloc_node_#res.base| (_ bv0 32)))) (exists ((|v_main_#t~ret4.base_23| (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#valid)| |v_main_#t~ret4.base_23| (_ bv1 1)) v_main_~s~0.base_BEFORE_CALL_10 (_ bv0 1)))) (and (= (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_main_#t~ret4.base_23|)))))))) (_ bv0 1)) (not (= (_ bv0 32) |v_main_#t~ret4.base_23|)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_main_#t~ret4.base_23|)))))))) (_ bv1 1))) (not (= |v_old(#valid)_BEFORE_CALL_3| (store .cse1 |v_main_#t~ret4.base_23| (_ bv0 1))))))) (= |v_old(#valid)_BEFORE_CALL_3| (store .cse0 |c_alloc_node_#res.base| (_ bv0 1)))))) is different from false [2021-11-07 08:18:10,570 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_old(#valid)_BEFORE_CALL_3| (Array (_ BitVec 32) (_ BitVec 1))) (v_main_~s~0.base_BEFORE_CALL_10 (_ BitVec 32))) (let ((.cse0 (store |c_#valid| v_main_~s~0.base_BEFORE_CALL_10 (_ bv0 1)))) (or (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |c_alloc_node_#res.base|)))))) (_ bv1 1)))) (not (= |c_alloc_node_#res.base| (_ bv0 32)))) (= |v_old(#valid)_BEFORE_CALL_3| (store .cse0 |c_alloc_node_#res.base| (_ bv0 1))) (exists ((|v_main_#t~ret4.base_23| (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#valid)| |v_main_#t~ret4.base_23| (_ bv1 1)) v_main_~s~0.base_BEFORE_CALL_10 (_ bv0 1)))) (and (not (= (_ bv0 32) |v_main_#t~ret4.base_23|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_main_#t~ret4.base_23|))))))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_main_#t~ret4.base_23|)))))))) (_ bv1 1))) (not (= |v_old(#valid)_BEFORE_CALL_3| (store .cse1 |v_main_#t~ret4.base_23| (_ bv0 1)))))))))) is different from false [2021-11-07 08:18:11,005 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_old(#valid)_BEFORE_CALL_3| (Array (_ BitVec 32) (_ BitVec 1))) (v_main_~s~0.base_BEFORE_CALL_10 (_ BitVec 32))) (let ((.cse0 (store |c_#valid| v_main_~s~0.base_BEFORE_CALL_10 (_ bv0 1)))) (or (= |v_old(#valid)_BEFORE_CALL_3| (store .cse0 c_alloc_node_~temp~0.base (_ bv0 1))) (and (not (= (_ bv0 32) c_alloc_node_~temp~0.base)) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 c_alloc_node_~temp~0.base)))))))))) (exists ((|v_main_#t~ret4.base_23| (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#valid)| |v_main_#t~ret4.base_23| (_ bv1 1)) v_main_~s~0.base_BEFORE_CALL_10 (_ bv0 1)))) (and (not (= (_ bv0 32) |v_main_#t~ret4.base_23|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_main_#t~ret4.base_23|))))))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_main_#t~ret4.base_23|)))))))) (_ bv1 1))) (not (= |v_old(#valid)_BEFORE_CALL_3| (store .cse1 |v_main_#t~ret4.base_23| (_ bv0 1)))))))))) is different from false [2021-11-07 08:18:11,790 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_old(#valid)_BEFORE_CALL_3| (Array (_ BitVec 32) (_ BitVec 1))) (v_alloc_node_~temp~0.base_53 (_ BitVec 32)) (v_main_~s~0.base_BEFORE_CALL_10 (_ BitVec 32))) (let ((.cse0 (store (store |c_#valid| v_alloc_node_~temp~0.base_53 (_ bv1 1)) v_main_~s~0.base_BEFORE_CALL_10 (_ bv0 1)))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_alloc_node_~temp~0.base_53)))))) (= v_alloc_node_~temp~0.base_53 (_ bv0 32)) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 v_alloc_node_~temp~0.base_53)))))))))) (= |v_old(#valid)_BEFORE_CALL_3| (store .cse0 v_alloc_node_~temp~0.base_53 (_ bv0 1))) (exists ((|v_main_#t~ret4.base_23| (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#valid)| |v_main_#t~ret4.base_23| (_ bv1 1)) v_main_~s~0.base_BEFORE_CALL_10 (_ bv0 1)))) (and (not (= (_ bv0 32) |v_main_#t~ret4.base_23|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_main_#t~ret4.base_23|))))))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_main_#t~ret4.base_23|)))))))) (_ bv1 1))) (not (= |v_old(#valid)_BEFORE_CALL_3| (store .cse1 |v_main_#t~ret4.base_23| (_ bv0 1)))))))))) is different from false [2021-11-07 08:18:36,876 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:18:36,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653191072] [2021-11-07 08:18:36,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|v_main_#t~ret4.base_23|] [2021-11-07 08:18:36,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [597142423] [2021-11-07 08:18:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:36,877 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 08:18:36,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/cvc4 [2021-11-07 08:18:36,879 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 08:18:36,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 08:18:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:37,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 08:18:37,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:18:37,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:18:37,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-07 08:18:37,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2021-11-07 08:18:37,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-11-07 08:18:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:18:38,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:18:54,675 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_old(#valid)_BEFORE_CALL_7| (Array (_ BitVec 32) (_ BitVec 1))) (v_main_~s~0.base_BEFORE_CALL_12 (_ BitVec 32))) (let ((.cse0 (store |c_#valid| v_main_~s~0.base_BEFORE_CALL_12 (_ bv0 1)))) (or (= |v_old(#valid)_BEFORE_CALL_7| (store .cse0 |c_alloc_node_#res.base| (_ bv0 1))) (exists ((|v_main_#t~ret4.base_23| (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#valid)| |v_main_#t~ret4.base_23| (_ bv1 1)) v_main_~s~0.base_BEFORE_CALL_12 (_ bv0 1)))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_main_#t~ret4.base_23|))))))))))) (_ bv1 1))) (not (= (store .cse1 |v_main_#t~ret4.base_23| (_ bv0 1)) |v_old(#valid)_BEFORE_CALL_7|)) (= (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_main_#t~ret4.base_23|)))))))) (_ bv0 1)) (not (= (_ bv0 32) |v_main_#t~ret4.base_23|))))) (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |c_alloc_node_#res.base|)))))))))) (_ bv1 1)))) (not (= |c_alloc_node_#res.base| (_ bv0 32))))))) is different from false [2021-11-07 08:18:55,118 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_old(#valid)_BEFORE_CALL_7| (Array (_ BitVec 32) (_ BitVec 1))) (v_main_~s~0.base_BEFORE_CALL_12 (_ BitVec 32))) (let ((.cse1 (store |c_#valid| v_main_~s~0.base_BEFORE_CALL_12 (_ bv0 1)))) (or (exists ((|v_main_#t~ret4.base_23| (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| |v_main_#t~ret4.base_23| (_ bv1 1)) v_main_~s~0.base_BEFORE_CALL_12 (_ bv0 1)))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_main_#t~ret4.base_23|))))))))))) (_ bv1 1))) (not (= (store .cse0 |v_main_#t~ret4.base_23| (_ bv0 1)) |v_old(#valid)_BEFORE_CALL_7|)) (not (= (_ bv0 32) |v_main_#t~ret4.base_23|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_main_#t~ret4.base_23|)))))))))))))) (= |v_old(#valid)_BEFORE_CALL_7| (store .cse1 |c_alloc_node_#res.base| (_ bv0 1))) (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |c_alloc_node_#res.base|)))))))))) (_ bv1 1)))) (not (= |c_alloc_node_#res.base| (_ bv0 32))))))) is different from false [2021-11-07 08:18:55,597 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_old(#valid)_BEFORE_CALL_7| (Array (_ BitVec 32) (_ BitVec 1))) (v_main_~s~0.base_BEFORE_CALL_12 (_ BitVec 32))) (let ((.cse1 (store |c_#valid| v_main_~s~0.base_BEFORE_CALL_12 (_ bv0 1)))) (or (exists ((|v_main_#t~ret4.base_23| (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| |v_main_#t~ret4.base_23| (_ bv1 1)) v_main_~s~0.base_BEFORE_CALL_12 (_ bv0 1)))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_main_#t~ret4.base_23|))))))))))) (_ bv1 1))) (not (= (store .cse0 |v_main_#t~ret4.base_23| (_ bv0 1)) |v_old(#valid)_BEFORE_CALL_7|)) (not (= (_ bv0 32) |v_main_#t~ret4.base_23|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_main_#t~ret4.base_23|)))))))))))))) (= |v_old(#valid)_BEFORE_CALL_7| (store .cse1 c_alloc_node_~temp~0.base (_ bv0 1))) (and (not (= (_ bv0 32) c_alloc_node_~temp~0.base)) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 c_alloc_node_~temp~0.base))))))))))))))))) is different from false [2021-11-07 08:18:56,421 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_old(#valid)_BEFORE_CALL_7| (Array (_ BitVec 32) (_ BitVec 1))) (v_alloc_node_~temp~0.base_60 (_ BitVec 32)) (v_main_~s~0.base_BEFORE_CALL_12 (_ BitVec 32))) (let ((.cse1 (store (store |c_#valid| v_alloc_node_~temp~0.base_60 (_ bv1 1)) v_main_~s~0.base_BEFORE_CALL_12 (_ bv0 1)))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_alloc_node_~temp~0.base_60))))) (exists ((|v_main_#t~ret4.base_23| (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| |v_main_#t~ret4.base_23| (_ bv1 1)) v_main_~s~0.base_BEFORE_CALL_12 (_ bv0 1)))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_main_#t~ret4.base_23|))))))))))) (_ bv1 1))) (not (= (store .cse0 |v_main_#t~ret4.base_23| (_ bv0 1)) |v_old(#valid)_BEFORE_CALL_7|)) (not (= (_ bv0 32) |v_main_#t~ret4.base_23|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_main_#t~ret4.base_23|)))))))))))))) (= |v_old(#valid)_BEFORE_CALL_7| (store .cse1 v_alloc_node_~temp~0.base_60 (_ bv0 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 v_alloc_node_~temp~0.base_60)))))))))) (_ bv1 1)))) (= v_alloc_node_~temp~0.base_60 (_ bv0 32))))) is different from false [2021-11-07 08:19:18,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|v_main_#t~ret4.base_23|] [2021-11-07 08:19:18,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759490576] [2021-11-07 08:19:18,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:19:18,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:19:18,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:19:18,986 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:19:18,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:19:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:19:19,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:19:19,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:19:21,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-07 08:19:22,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-11-07 08:19:22,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-07 08:19:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:19:31,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:19:50,401 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_old(#valid)_BEFORE_CALL_11| (Array (_ BitVec 32) (_ BitVec 1))) (v_main_~s~0.base_BEFORE_CALL_14 (_ BitVec 32))) (or (= (store (store |c_#valid| v_main_~s~0.base_BEFORE_CALL_14 (_ bv0 1)) |c_alloc_node_#res.base| (_ bv0 1)) |v_old(#valid)_BEFORE_CALL_11|) (exists ((|v_main_#t~ret4.base_29| (_ BitVec 32))) (and (not (= (store (store (store |c_old(#valid)| |v_main_#t~ret4.base_29| (_ bv1 1)) v_main_~s~0.base_BEFORE_CALL_14 (_ bv0 1)) |v_main_#t~ret4.base_29| (_ bv0 1)) |v_old(#valid)_BEFORE_CALL_11|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_main_#t~ret4.base_29|))))))))))) is different from false [2021-11-07 08:19:50,520 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_old(#valid)_BEFORE_CALL_11| (Array (_ BitVec 32) (_ BitVec 1))) (v_main_~s~0.base_BEFORE_CALL_14 (_ BitVec 32))) (or (= (store (store |c_#valid| v_main_~s~0.base_BEFORE_CALL_14 (_ bv0 1)) c_alloc_node_~temp~0.base (_ bv0 1)) |v_old(#valid)_BEFORE_CALL_11|) (exists ((|v_main_#t~ret4.base_29| (_ BitVec 32))) (and (not (= (store (store (store |c_old(#valid)| |v_main_#t~ret4.base_29| (_ bv1 1)) v_main_~s~0.base_BEFORE_CALL_14 (_ bv0 1)) |v_main_#t~ret4.base_29| (_ bv0 1)) |v_old(#valid)_BEFORE_CALL_11|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_main_#t~ret4.base_29|))))))))))) is different from false [2021-11-07 08:19:50,696 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_old(#valid)_BEFORE_CALL_11| (Array (_ BitVec 32) (_ BitVec 1))) (v_main_~s~0.base_BEFORE_CALL_14 (_ BitVec 32)) (v_alloc_node_~temp~0.base_67 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_alloc_node_~temp~0.base_67))))) (= (store (store (store |c_#valid| v_alloc_node_~temp~0.base_67 (_ bv1 1)) v_main_~s~0.base_BEFORE_CALL_14 (_ bv0 1)) v_alloc_node_~temp~0.base_67 (_ bv0 1)) |v_old(#valid)_BEFORE_CALL_11|) (exists ((|v_main_#t~ret4.base_29| (_ BitVec 32))) (and (not (= (store (store (store |c_old(#valid)| |v_main_#t~ret4.base_29| (_ bv1 1)) v_main_~s~0.base_BEFORE_CALL_14 (_ bv0 1)) |v_main_#t~ret4.base_29| (_ bv0 1)) |v_old(#valid)_BEFORE_CALL_11|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_main_#t~ret4.base_29|))))))))))) is different from false [2021-11-07 08:20:32,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|v_main_#t~ret4.base_29|] [2021-11-07 08:20:32,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:32,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 08:20:32,408 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-11-07 08:20:32,408 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 08:20:32,415 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ENSURES_VIOLATIONMEMORY_LEAK [2021-11-07 08:20:32,418 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-11-07 08:20:32,418 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-07 08:20:32,418 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-11-07 08:20:32,419 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-11-07 08:20:32,419 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-11-07 08:20:32,419 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-11-07 08:20:32,419 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-11-07 08:20:32,419 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-11-07 08:20:32,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:20:32,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:20:32,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:20:32,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:20:32,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:20:32,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:20:32,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 08:20:32,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:32,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:33,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:33,027 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:33,032 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 08:20:33,035 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-11-07 08:20:33,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:20:33 BoogieIcfgContainer [2021-11-07 08:20:33,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 08:20:33,048 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 08:20:33,048 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 08:20:33,049 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 08:20:33,049 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:16:50" (3/4) ... [2021-11-07 08:20:33,053 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 08:20:33,053 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 08:20:33,054 INFO L168 Benchmark]: Toolchain (without parser) took 223610.15 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 43.3 MB in the beginning and 28.9 MB in the end (delta: 14.4 MB). Peak memory consumption was 33.7 MB. Max. memory is 16.1 GB. [2021-11-07 08:20:33,055 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 65.0 MB. Free memory is still 45.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:20:33,055 INFO L168 Benchmark]: CACSL2BoogieTranslator took 663.10 ms. Allocated memory is still 65.0 MB. Free memory was 43.0 MB in the beginning and 39.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 08:20:33,055 INFO L168 Benchmark]: Boogie Preprocessor took 88.57 ms. Allocated memory is still 65.0 MB. Free memory was 38.8 MB in the beginning and 36.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:20:33,056 INFO L168 Benchmark]: RCFGBuilder took 788.51 ms. Allocated memory is still 65.0 MB. Free memory was 36.5 MB in the beginning and 34.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. [2021-11-07 08:20:33,056 INFO L168 Benchmark]: TraceAbstraction took 222054.21 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 33.5 MB in the beginning and 29.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 24.2 MB. Max. memory is 16.1 GB. [2021-11-07 08:20:33,056 INFO L168 Benchmark]: Witness Printer took 4.79 ms. Allocated memory is still 86.0 MB. Free memory is still 28.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:20:33,058 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 65.0 MB. Free memory is still 45.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 663.10 ms. Allocated memory is still 65.0 MB. Free memory was 43.0 MB in the beginning and 39.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 88.57 ms. Allocated memory is still 65.0 MB. Free memory was 38.8 MB in the beginning and 36.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 788.51 ms. Allocated memory is still 65.0 MB. Free memory was 36.5 MB in the beginning and 34.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 222054.21 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 33.5 MB in the beginning and 29.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 24.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.79 ms. Allocated memory is still 86.0 MB. Free memory is still 28.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 568]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: unable to decide satisfiability of path constraint, overapproximation of memtrack at line 568. Possible FailurePath: [L569] CALL, EXPR alloc_node() [L562] struct node* temp = (struct node*) malloc(sizeof(struct node)); [L563] COND FALSE !(((void *)0) == temp) [L566] return temp; [L569] RET, EXPR alloc_node() [L569] struct node* s = alloc_node(); [L570] CALL, EXPR alloc_node() [L562] struct node* temp = (struct node*) malloc(sizeof(struct node)); [L563] COND FALSE !(((void *)0) == temp) [L566] return temp; [L570] RET, EXPR alloc_node() [L570] s->next = alloc_node() [L571] *s = *s [L572] EXPR s->next [L572] struct node* t = s->next; [L573] free(s) [L573] free(s) [L573] free(s) [L574] free(t) [L574] free(t) [L574] free(t) [L575] return 0; - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 574]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 574]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 574]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 61 locations, 15 error locations. Started 1 CEGAR loops. OverallTime: 221.9s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 23.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 106 SDtfs, 154 SDslu, 491 SDs, 0 SdLazy, 805 SolverSat, 51 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 11.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 341 GetRequests, 235 SyntacticMatches, 11 SemanticMatches, 95 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 27.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=0, InterpolantAutomatonStates: 60, 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, 6 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 79.1s InterpolantComputationTime, 217 NumberOfCodeBlocks, 217 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 329 ConstructedInterpolants, 52 QuantifiedInterpolants, 3502 SizeOfPredicates, 35 NumberOfNonLiveVariables, 711 ConjunctsInSsa, 104 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 37/65 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 08:20:33,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adc5319-d044-4535-b314-5d17b9a1d212/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN