./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/optional_data_creation_test04-1.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_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/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_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/optional_data_creation_test04-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/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_390942da-e9dd-43f3-8412-12f67aec777c/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 7408f3b7e084094987873e007e2bbb0a022372240d1ad946af6301d3e9707406 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:53:02,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:53:02,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:53:02,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:53:02,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:53:02,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:53:02,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:53:02,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:53:02,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:53:02,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:53:02,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:53:02,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:53:02,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:53:02,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:53:02,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:53:02,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:53:02,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:53:02,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:53:02,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:53:02,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:53:02,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:53:02,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:53:02,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:53:02,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:53:02,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:53:02,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:53:02,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:53:02,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:53:02,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:53:02,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:53:02,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:53:02,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:53:02,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:53:02,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:53:02,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:53:02,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:53:02,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:53:02,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:53:02,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:53:02,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:53:02,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:53:02,905 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-07 07:53:02,954 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:53:02,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:53:02,955 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:53:02,955 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:53:02,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:53:02,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:53:02,963 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:53:02,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:53:02,964 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:53:02,964 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 07:53:02,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:53:02,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:53:02,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:53:02,966 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 07:53:02,966 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 07:53:02,967 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 07:53:02,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:53:02,967 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 07:53:02,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:53:02,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:53:02,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:53:02,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:53:02,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:53:02,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:53:02,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:53:02,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:53:02,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:53:02,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:53:02,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:53:02,970 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_390942da-e9dd-43f3-8412-12f67aec777c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7408f3b7e084094987873e007e2bbb0a022372240d1ad946af6301d3e9707406 [2021-11-07 07:53:03,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:53:03,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:53:03,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:53:03,313 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:53:03,314 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:53:03,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/memsafety-ext2/optional_data_creation_test04-1.i [2021-11-07 07:53:03,395 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/data/2c093313f/14d46a7d3ffb48069bf8c34fbed6ccc0/FLAG1f5c1f2ba [2021-11-07 07:53:03,967 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:53:03,968 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/sv-benchmarks/c/memsafety-ext2/optional_data_creation_test04-1.i [2021-11-07 07:53:03,979 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/data/2c093313f/14d46a7d3ffb48069bf8c34fbed6ccc0/FLAG1f5c1f2ba [2021-11-07 07:53:04,268 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/data/2c093313f/14d46a7d3ffb48069bf8c34fbed6ccc0 [2021-11-07 07:53:04,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:53:04,272 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 07:53:04,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:53:04,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:53:04,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:53:04,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:53:04" (1/1) ... [2021-11-07 07:53:04,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c319da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:04, skipping insertion in model container [2021-11-07 07:53:04,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:53:04" (1/1) ... [2021-11-07 07:53:04,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:53:04,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:53:04,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:53:04,663 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 07:53:04,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@d7c3279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:04, skipping insertion in model container [2021-11-07 07:53:04,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:53:04,665 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-07 07:53:04,667 INFO L168 Benchmark]: Toolchain (without parser) took 394.17 ms. Allocated memory is still 92.3 MB. Free memory was 55.8 MB in the beginning and 67.7 MB in the end (delta: -11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 07:53:04,668 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 92.3 MB. Free memory is still 73.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:53:04,668 INFO L168 Benchmark]: CACSL2BoogieTranslator took 391.71 ms. Allocated memory is still 92.3 MB. Free memory was 55.6 MB in the beginning and 67.7 MB in the end (delta: -12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 07:53:04,670 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 92.3 MB. Free memory is still 73.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 391.71 ms. Allocated memory is still 92.3 MB. Free memory was 55.6 MB in the beginning and 67.7 MB in the end (delta: -12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 555]: 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_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/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_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/optional_data_creation_test04-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/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_390942da-e9dd-43f3-8412-12f67aec777c/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 7408f3b7e084094987873e007e2bbb0a022372240d1ad946af6301d3e9707406 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:53:06,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:53:06,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:53:06,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:53:06,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:53:06,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:53:06,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:53:06,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:53:06,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:53:06,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:53:06,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:53:06,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:53:06,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:53:06,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:53:06,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:53:06,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:53:06,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:53:06,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:53:06,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:53:06,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:53:06,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:53:06,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:53:06,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:53:06,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:53:06,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:53:06,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:53:06,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:53:06,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:53:06,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:53:06,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:53:06,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:53:06,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:53:06,857 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:53:06,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:53:06,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:53:06,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:53:06,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:53:06,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:53:06,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:53:06,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:53:06,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:53:06,866 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-07 07:53:06,907 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:53:06,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:53:06,908 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:53:06,908 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:53:06,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:53:06,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:53:06,910 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:53:06,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:53:06,911 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:53:06,911 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 07:53:06,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:53:06,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:53:06,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:53:06,913 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 07:53:06,913 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 07:53:06,913 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 07:53:06,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:53:06,913 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 07:53:06,914 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 07:53:06,914 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 07:53:06,914 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:53:06,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:53:06,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:53:06,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:53:06,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:53:06,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:53:06,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:53:06,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:53:06,916 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-07 07:53:06,916 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 07:53:06,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:53:06,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 07:53:06,917 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_390942da-e9dd-43f3-8412-12f67aec777c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7408f3b7e084094987873e007e2bbb0a022372240d1ad946af6301d3e9707406 [2021-11-07 07:53:07,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:53:07,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:53:07,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:53:07,307 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:53:07,308 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:53:07,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/memsafety-ext2/optional_data_creation_test04-1.i [2021-11-07 07:53:07,381 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/data/40c0fbc46/1073fe16278245c6adcbbbb053014121/FLAG7d652e7dd [2021-11-07 07:53:07,963 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:53:07,963 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/sv-benchmarks/c/memsafety-ext2/optional_data_creation_test04-1.i [2021-11-07 07:53:07,982 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/data/40c0fbc46/1073fe16278245c6adcbbbb053014121/FLAG7d652e7dd [2021-11-07 07:53:08,231 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/data/40c0fbc46/1073fe16278245c6adcbbbb053014121 [2021-11-07 07:53:08,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:53:08,237 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 07:53:08,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:53:08,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:53:08,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:53:08,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:53:08" (1/1) ... [2021-11-07 07:53:08,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14cc5dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:08, skipping insertion in model container [2021-11-07 07:53:08,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:53:08" (1/1) ... [2021-11-07 07:53:08,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:53:08,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:53:08,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:53:08,661 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 07:53:08,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:53:08,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:53:08,742 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:53:08,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:53:08,850 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:53:08,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:08 WrapperNode [2021-11-07 07:53:08,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:53:08,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:53:08,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:53:08,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:53:08,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:08" (1/1) ... [2021-11-07 07:53:08,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:08" (1/1) ... [2021-11-07 07:53:08,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:08" (1/1) ... [2021-11-07 07:53:08,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:08" (1/1) ... [2021-11-07 07:53:08,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:08" (1/1) ... [2021-11-07 07:53:08,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:08" (1/1) ... [2021-11-07 07:53:08,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:08" (1/1) ... [2021-11-07 07:53:08,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:53:08,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:53:08,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:53:08,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:53:08,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:08" (1/1) ... [2021-11-07 07:53:08,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:53:08,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:08,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:53:08,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:53:08,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 07:53:08,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:53:08,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 07:53:08,999 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 07:53:08,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-07 07:53:09,000 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-07 07:53:09,000 INFO L138 BoogieDeclarations]: Found implementation of procedure create_data [2021-11-07 07:53:09,000 INFO L138 BoogieDeclarations]: Found implementation of procedure freeData [2021-11-07 07:53:09,000 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-11-07 07:53:09,000 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 07:53:09,001 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 07:53:09,001 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 07:53:09,001 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 07:53:09,001 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 07:53:09,001 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 07:53:09,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:53:09,002 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 07:53:09,002 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 07:53:09,002 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 07:53:09,002 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 07:53:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 07:53:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 07:53:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 07:53:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 07:53:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 07:53:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 07:53:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 07:53:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 07:53:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 07:53:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 07:53:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 07:53:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 07:53:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-07 07:53:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-07 07:53:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 07:53:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 07:53:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 07:53:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 07:53:09,006 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 07:53:09,006 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 07:53:09,006 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 07:53:09,006 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 07:53:09,006 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 07:53:09,006 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 07:53:09,007 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 07:53:09,007 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 07:53:09,007 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 07:53:09,007 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 07:53:09,007 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 07:53:09,007 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 07:53:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 07:53:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 07:53:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 07:53:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 07:53:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 07:53:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 07:53:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 07:53:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 07:53:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 07:53:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 07:53:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 07:53:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 07:53:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 07:53:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 07:53:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 07:53:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 07:53:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 07:53:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 07:53:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 07:53:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 07:53:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 07:53:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 07:53:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-07 07:53:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 07:53:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 07:53:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 07:53:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 07:53:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 07:53:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 07:53:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 07:53:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 07:53:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 07:53:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 07:53:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 07:53:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 07:53:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 07:53:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 07:53:09,014 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 07:53:09,014 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 07:53:09,014 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 07:53:09,014 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 07:53:09,014 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 07:53:09,014 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 07:53:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 07:53:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 07:53:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 07:53:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 07:53:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 07:53:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 07:53:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 07:53:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 07:53:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 07:53:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 07:53:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 07:53:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 07:53:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 07:53:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 07:53:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 07:53:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 07:53:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 07:53:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 07:53:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 07:53:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 07:53:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 07:53:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 07:53:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 07:53:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 07:53:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 07:53:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 07:53:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 07:53:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-07 07:53:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure create_data [2021-11-07 07:53:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 07:53:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 07:53:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 07:53:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 07:53:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure freeData [2021-11-07 07:53:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:53:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-11-07 07:53:09,024 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 07:53:09,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 07:53:09,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 07:53:09,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 07:53:09,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:53:09,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 07:53:09,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 07:53:09,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 07:53:09,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 07:53:09,952 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:53:09,952 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-07 07:53:09,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:53:09 BoogieIcfgContainer [2021-11-07 07:53:09,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:53:09,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:53:09,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:53:09,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:53:09,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:53:08" (1/3) ... [2021-11-07 07:53:09,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26e3cf9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:53:09, skipping insertion in model container [2021-11-07 07:53:09,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:08" (2/3) ... [2021-11-07 07:53:09,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26e3cf9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:53:09, skipping insertion in model container [2021-11-07 07:53:09,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:53:09" (3/3) ... [2021-11-07 07:53:09,965 INFO L111 eAbstractionObserver]: Analyzing ICFG optional_data_creation_test04-1.i [2021-11-07 07:53:09,970 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:53:09,971 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2021-11-07 07:53:10,038 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:53:10,047 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 07:53:10,047 INFO L340 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2021-11-07 07:53:10,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 99 states have internal predecessors, (109), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 07:53:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 07:53:10,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:10,082 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:10,082 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:53:10,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:10,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1425605137, now seen corresponding path program 1 times [2021-11-07 07:53:10,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:53:10,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908718131] [2021-11-07 07:53:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:10,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:53:10,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:53:10,110 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:53:10,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 07:53:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:10,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 07:53:10,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:10,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:53:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:10,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:53:10,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908718131] [2021-11-07 07:53:10,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908718131] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:10,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:10,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 07:53:10,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641280212] [2021-11-07 07:53:10,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:53:10,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:53:10,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:53:10,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:53:10,372 INFO L87 Difference]: Start difference. First operand has 110 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 99 states have internal predecessors, (109), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:10,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:10,392 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2021-11-07 07:53:10,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:53:10,394 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-11-07 07:53:10,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:10,403 INFO L225 Difference]: With dead ends: 110 [2021-11-07 07:53:10,403 INFO L226 Difference]: Without dead ends: 107 [2021-11-07 07:53:10,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:53:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-07 07:53:10,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-07 07:53:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 52 states have (on average 2.0) internal successors, (104), 97 states have internal predecessors, (104), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:53:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2021-11-07 07:53:10,444 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 8 [2021-11-07 07:53:10,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:10,445 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2021-11-07 07:53:10,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:10,445 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2021-11-07 07:53:10,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 07:53:10,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:10,446 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:10,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:10,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:53:10,657 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr0REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:53:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1244153200, now seen corresponding path program 1 times [2021-11-07 07:53:10,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:53:10,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361315780] [2021-11-07 07:53:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:10,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:53:10,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:53:10,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:53:10,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 07:53:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:10,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:53:10,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:10,863 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 07:53:10,948 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 07:53:10,948 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 16 treesize of output 21 [2021-11-07 07:53:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:10,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:53:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:11,064 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:53:11,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361315780] [2021-11-07 07:53:11,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361315780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:11,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:11,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 07:53:11,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324325352] [2021-11-07 07:53:11,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:53:11,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:53:11,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:53:11,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:53:11,067 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:11,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:11,624 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2021-11-07 07:53:11,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:53:11,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-11-07 07:53:11,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:11,629 INFO L225 Difference]: With dead ends: 116 [2021-11-07 07:53:11,630 INFO L226 Difference]: Without dead ends: 116 [2021-11-07 07:53:11,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:53:11,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-07 07:53:11,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2021-11-07 07:53:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 98 states have internal predecessors, (107), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 07:53:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2021-11-07 07:53:11,645 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 9 [2021-11-07 07:53:11,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:11,645 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2021-11-07 07:53:11,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2021-11-07 07:53:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 07:53:11,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:11,646 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:11,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:11,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:53:11,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr1REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:53:11,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:11,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1244153201, now seen corresponding path program 1 times [2021-11-07 07:53:11,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:53:11,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828197341] [2021-11-07 07:53:11,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:11,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:53:11,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:53:11,860 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:53:11,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 07:53:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:11,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:53:11,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:12,018 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 07:53:12,024 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 07:53:12,144 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:53:12,145 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 26 treesize of output 28 [2021-11-07 07:53:12,155 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 07:53:12,160 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 25 treesize of output 21 [2021-11-07 07:53:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:12,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:53:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:12,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:53:12,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828197341] [2021-11-07 07:53:12,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828197341] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:12,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:12,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 07:53:12,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465093045] [2021-11-07 07:53:12,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:53:12,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:53:12,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:53:12,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:53:12,677 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:31,064 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2021-11-07 07:53:31,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:53:31,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-11-07 07:53:31,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:31,067 INFO L225 Difference]: With dead ends: 114 [2021-11-07 07:53:31,067 INFO L226 Difference]: Without dead ends: 114 [2021-11-07 07:53:31,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:53:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-07 07:53:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2021-11-07 07:53:31,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 98 states have internal predecessors, (106), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 07:53:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2021-11-07 07:53:31,077 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 9 [2021-11-07 07:53:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:31,078 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2021-11-07 07:53:31,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2021-11-07 07:53:31,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:53:31,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:31,095 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:31,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:31,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:53:31,296 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr2REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:53:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash -85956322, now seen corresponding path program 1 times [2021-11-07 07:53:31,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:53:31,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212158291] [2021-11-07 07:53:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:31,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:53:31,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:53:31,298 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:53:31,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 07:53:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:31,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:53:31,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:31,444 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 07:53:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:31,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:53:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:31,494 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:53:31,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212158291] [2021-11-07 07:53:31,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212158291] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:31,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:31,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 07:53:31,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704856986] [2021-11-07 07:53:31,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:53:31,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:53:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:53:31,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:53:31,497 INFO L87 Difference]: Start difference. First operand 109 states and 117 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:31,683 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-11-07 07:53:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:53:31,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-07 07:53:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:31,685 INFO L225 Difference]: With dead ends: 108 [2021-11-07 07:53:31,685 INFO L226 Difference]: Without dead ends: 108 [2021-11-07 07:53:31,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:53:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-07 07:53:31,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-11-07 07:53:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 97 states have internal predecessors, (105), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 07:53:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2021-11-07 07:53:31,694 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 10 [2021-11-07 07:53:31,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:31,694 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2021-11-07 07:53:31,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2021-11-07 07:53:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:53:31,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:31,695 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:31,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:31,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:53:31,896 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr3REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:53:31,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:31,897 INFO L85 PathProgramCache]: Analyzing trace with hash -85956321, now seen corresponding path program 1 times [2021-11-07 07:53:31,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:53:31,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493637618] [2021-11-07 07:53:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:31,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:53:31,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:53:31,899 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:53:31,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 07:53:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:32,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:53:32,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:32,074 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 07:53:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:32,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:53:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:32,219 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:53:32,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493637618] [2021-11-07 07:53:32,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493637618] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:32,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:32,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 07:53:32,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411754793] [2021-11-07 07:53:32,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:53:32,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:53:32,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:53:32,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:53:32,222 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:32,587 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2021-11-07 07:53:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:53:32,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-07 07:53:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:32,590 INFO L225 Difference]: With dead ends: 107 [2021-11-07 07:53:32,590 INFO L226 Difference]: Without dead ends: 107 [2021-11-07 07:53:32,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:53:32,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-07 07:53:32,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-07 07:53:32,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 96 states have internal predecessors, (104), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 07:53:32,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2021-11-07 07:53:32,598 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 10 [2021-11-07 07:53:32,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:32,598 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2021-11-07 07:53:32,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:32,599 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2021-11-07 07:53:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 07:53:32,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:32,600 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:32,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:32,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:53:32,810 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting create_dataErr0REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:53:32,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:32,811 INFO L85 PathProgramCache]: Analyzing trace with hash 963677749, now seen corresponding path program 1 times [2021-11-07 07:53:32,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:53:32,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040016394] [2021-11-07 07:53:32,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:32,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:53:32,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:53:32,813 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:53:32,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 07:53:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:32,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:53:32,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:33,011 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 07:53:33,061 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 07:53:33,061 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 16 treesize of output 21 [2021-11-07 07:53:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:33,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:53:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:33,153 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:53:33,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040016394] [2021-11-07 07:53:33,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040016394] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:33,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:33,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 07:53:33,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533419983] [2021-11-07 07:53:33,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:53:33,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:53:33,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:53:33,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:53:33,155 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:33,362 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2021-11-07 07:53:33,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:53:33,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-07 07:53:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:33,364 INFO L225 Difference]: With dead ends: 105 [2021-11-07 07:53:33,364 INFO L226 Difference]: Without dead ends: 105 [2021-11-07 07:53:33,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:53:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-07 07:53:33,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-11-07 07:53:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 92 states have internal predecessors, (100), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 07:53:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2021-11-07 07:53:33,372 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 15 [2021-11-07 07:53:33,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:33,372 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2021-11-07 07:53:33,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:33,372 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2021-11-07 07:53:33,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 07:53:33,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:33,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:33,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:33,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:53:33,585 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting create_dataErr1REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:53:33,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:33,586 INFO L85 PathProgramCache]: Analyzing trace with hash 963677750, now seen corresponding path program 1 times [2021-11-07 07:53:33,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:53:33,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372997130] [2021-11-07 07:53:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:33,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:53:33,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:53:33,588 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:53:33,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 07:53:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:33,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 07:53:33,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:33,829 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 07:53:33,849 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 07:53:33,921 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:53:33,921 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 26 treesize of output 28 [2021-11-07 07:53:33,932 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 07:53:33,932 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 25 treesize of output 21 [2021-11-07 07:53:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:33,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:53:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:36,280 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:53:36,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372997130] [2021-11-07 07:53:36,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372997130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:36,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:36,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 07:53:36,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354880747] [2021-11-07 07:53:36,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:53:36,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:53:36,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:53:36,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-07 07:53:36,282 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:36,925 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2021-11-07 07:53:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:53:36,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-07 07:53:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:36,927 INFO L225 Difference]: With dead ends: 105 [2021-11-07 07:53:36,927 INFO L226 Difference]: Without dead ends: 105 [2021-11-07 07:53:36,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-07 07:53:36,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-07 07:53:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2021-11-07 07:53:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 88 states have internal predecessors, (96), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 07:53:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2021-11-07 07:53:36,934 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 15 [2021-11-07 07:53:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:36,934 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2021-11-07 07:53:36,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:36,934 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2021-11-07 07:53:36,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 07:53:36,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:36,935 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:36,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:37,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:53:37,147 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr4REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:53:37,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:37,147 INFO L85 PathProgramCache]: Analyzing trace with hash -190753018, now seen corresponding path program 1 times [2021-11-07 07:53:37,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:53:37,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413428183] [2021-11-07 07:53:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:37,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:53:37,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:53:37,150 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:53:37,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 07:53:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:37,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:53:37,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:37,341 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 07:53:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:37,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:53:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:37,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:53:37,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413428183] [2021-11-07 07:53:37,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413428183] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:37,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:37,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 07:53:37,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562731006] [2021-11-07 07:53:37,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:53:37,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:53:37,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:53:37,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:53:37,580 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:53:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:37,996 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2021-11-07 07:53:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:53:37,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16 [2021-11-07 07:53:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:37,998 INFO L225 Difference]: With dead ends: 133 [2021-11-07 07:53:37,998 INFO L226 Difference]: Without dead ends: 133 [2021-11-07 07:53:37,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:53:37,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-07 07:53:38,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2021-11-07 07:53:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 55 states have (on average 1.7272727272727273) internal successors, (95), 87 states have internal predecessors, (95), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 07:53:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2021-11-07 07:53:38,005 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 16 [2021-11-07 07:53:38,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:38,005 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2021-11-07 07:53:38,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:53:38,005 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2021-11-07 07:53:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 07:53:38,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:38,007 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:38,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:38,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:53:38,218 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr5REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:53:38,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:38,218 INFO L85 PathProgramCache]: Analyzing trace with hash -190753017, now seen corresponding path program 1 times [2021-11-07 07:53:38,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:53:38,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823461295] [2021-11-07 07:53:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:38,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:53:38,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:53:38,220 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:53:38,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 07:53:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:38,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:53:38,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:38,411 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 07:53:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:38,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:53:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:38,852 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:53:38,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823461295] [2021-11-07 07:53:38,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823461295] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:38,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:38,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 07:53:38,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673097124] [2021-11-07 07:53:38,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:53:38,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:53:38,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:53:38,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:53:38,853 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:53:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:39,540 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2021-11-07 07:53:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:53:39,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 16 [2021-11-07 07:53:39,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:39,543 INFO L225 Difference]: With dead ends: 107 [2021-11-07 07:53:39,544 INFO L226 Difference]: Without dead ends: 107 [2021-11-07 07:53:39,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:53:39,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-07 07:53:39,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2021-11-07 07:53:39,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 89 states have internal predecessors, (97), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-07 07:53:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2021-11-07 07:53:39,549 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 16 [2021-11-07 07:53:39,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:39,549 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2021-11-07 07:53:39,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:53:39,550 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2021-11-07 07:53:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 07:53:39,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:39,551 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:39,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:39,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:53:39,754 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr6REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:53:39,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1369948231, now seen corresponding path program 1 times [2021-11-07 07:53:39,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:53:39,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528354410] [2021-11-07 07:53:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:39,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:53:39,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:53:39,757 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:53:39,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 07:53:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:39,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:53:39,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:40,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:53:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:40,194 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:53:40,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528354410] [2021-11-07 07:53:40,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528354410] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:40,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:40,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 07:53:40,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170666095] [2021-11-07 07:53:40,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:53:40,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:53:40,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:53:40,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:53:40,197 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:53:40,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:40,619 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2021-11-07 07:53:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:53:40,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2021-11-07 07:53:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:40,622 INFO L225 Difference]: With dead ends: 133 [2021-11-07 07:53:40,622 INFO L226 Difference]: Without dead ends: 133 [2021-11-07 07:53:40,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:53:40,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-07 07:53:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 100. [2021-11-07 07:53:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 88 states have internal predecessors, (96), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-07 07:53:40,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2021-11-07 07:53:40,628 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 18 [2021-11-07 07:53:40,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:40,628 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2021-11-07 07:53:40,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:53:40,629 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2021-11-07 07:53:40,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 07:53:40,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:40,630 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:40,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:40,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:53:40,835 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting appendErr7REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:53:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:40,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1369948232, now seen corresponding path program 1 times [2021-11-07 07:53:40,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:53:40,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128342103] [2021-11-07 07:53:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:40,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:53:40,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:53:40,837 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:53:40,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 07:53:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:41,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:53:41,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:41,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:53:41,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 6 [2021-11-07 07:53:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:41,753 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:53:41,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128342103] [2021-11-07 07:53:41,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128342103] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:41,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:41,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 07:53:41,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125654402] [2021-11-07 07:53:41,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:53:41,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:53:41,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:53:41,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:53:41,755 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:53:42,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:42,898 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2021-11-07 07:53:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:53:42,899 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2021-11-07 07:53:42,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:42,900 INFO L225 Difference]: With dead ends: 102 [2021-11-07 07:53:42,900 INFO L226 Difference]: Without dead ends: 102 [2021-11-07 07:53:42,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:53:42,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-07 07:53:42,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-07 07:53:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 90 states have internal predecessors, (98), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-07 07:53:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-11-07 07:53:42,905 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 18 [2021-11-07 07:53:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:42,905 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-11-07 07:53:42,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:53:42,906 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-11-07 07:53:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 07:53:42,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:42,906 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:42,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:43,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:53:43,107 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting create_dataErr4REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:53:43,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:43,108 INFO L85 PathProgramCache]: Analyzing trace with hash -713507424, now seen corresponding path program 1 times [2021-11-07 07:53:43,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:53:43,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653574313] [2021-11-07 07:53:43,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:43,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:53:43,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:53:43,109 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:53:43,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 07:53:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:43,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:53:43,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:43,331 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 07:53:43,373 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 07:53:43,418 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 26 treesize of output 14 [2021-11-07 07:53:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:43,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:53:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:43,526 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:53:43,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653574313] [2021-11-07 07:53:43,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653574313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:43,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:43,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 07:53:43,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828103977] [2021-11-07 07:53:43,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:53:43,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:53:43,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:53:43,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:53:43,528 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:44,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:44,048 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2021-11-07 07:53:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:53:44,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-07 07:53:44,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:44,050 INFO L225 Difference]: With dead ends: 110 [2021-11-07 07:53:44,050 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 07:53:44,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:53:44,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 07:53:44,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2021-11-07 07:53:44,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 93 states have internal predecessors, (103), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-07 07:53:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2021-11-07 07:53:44,055 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 19 [2021-11-07 07:53:44,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:44,055 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2021-11-07 07:53:44,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2021-11-07 07:53:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 07:53:44,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:44,056 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:44,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:44,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:53:44,258 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting create_dataErr5REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:53:44,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash -713507423, now seen corresponding path program 1 times [2021-11-07 07:53:44,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:53:44,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211363706] [2021-11-07 07:53:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:44,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:53:44,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:53:44,261 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:53:44,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 07:53:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:44,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:53:44,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:44,517 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 07:53:44,553 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 19 treesize of output 15 [2021-11-07 07:53:44,565 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 13 treesize of output 9 [2021-11-07 07:53:44,688 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 39 treesize of output 27 [2021-11-07 07:53:44,694 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 24 treesize of output 12 [2021-11-07 07:53:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:44,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:53:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:45,241 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:53:45,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211363706] [2021-11-07 07:53:45,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211363706] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:45,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:45,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 07:53:45,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539037229] [2021-11-07 07:53:45,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:53:45,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:53:45,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:53:45,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:53:45,244 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:46,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:46,772 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2021-11-07 07:53:46,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:53:46,773 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-07 07:53:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:46,774 INFO L225 Difference]: With dead ends: 106 [2021-11-07 07:53:46,774 INFO L226 Difference]: Without dead ends: 106 [2021-11-07 07:53:46,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:53:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-07 07:53:46,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-11-07 07:53:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 62 states have (on average 1.6290322580645162) internal successors, (101), 93 states have internal predecessors, (101), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-07 07:53:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2021-11-07 07:53:46,778 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 19 [2021-11-07 07:53:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:46,779 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2021-11-07 07:53:46,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2021-11-07 07:53:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 07:53:46,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:46,780 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:46,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:46,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:53:46,992 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr5REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:53:46,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:46,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1726338626, now seen corresponding path program 1 times [2021-11-07 07:53:46,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:53:46,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93725171] [2021-11-07 07:53:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:46,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:53:46,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:53:46,994 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:53:46,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 07:53:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:47,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:53:47,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:47,265 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 07:53:47,277 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 07:53:47,546 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:53:47,546 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 30 treesize of output 32 [2021-11-07 07:53:47,562 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 07:53:47,562 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 29 treesize of output 29 [2021-11-07 07:53:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:47,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:53:54,203 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_BEFORE_CALL_6 (_ BitVec 32)) (v_append_~node~0.offset_BEFORE_CALL_4 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) v_append_~node~0.offset_BEFORE_CALL_4))) (and (bvule v_append_~node~0.offset_BEFORE_CALL_4 .cse0) (bvule .cse0 (select |c_#length| v_append_~node~0.base_BEFORE_CALL_6)))) (exists ((v_create_data_~data~0.base_19 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_create_data_~data~0.base_19)))))))) (let ((.cse1 (bvadd (_ bv4 32) v_append_~node~0.offset_BEFORE_CALL_4))) (or (not (bvule .cse1 (select (store |c_old(#length)| v_create_data_~data~0.base_19 (_ bv8 32)) v_append_~node~0.base_BEFORE_CALL_6))) (not (bvule v_append_~node~0.offset_BEFORE_CALL_4 .cse1)))))))) is different from false [2021-11-07 07:53:58,647 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_BEFORE_CALL_6 (_ BitVec 32)) (v_append_~node~0.offset_BEFORE_CALL_4 (_ BitVec 32)) (v_create_data_~data~0.base_20 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) v_append_~node~0.offset_BEFORE_CALL_4))) (and (bvule v_append_~node~0.offset_BEFORE_CALL_4 .cse0) (bvule .cse0 (select (store |c_#length| v_create_data_~data~0.base_20 (_ bv8 32)) v_append_~node~0.base_BEFORE_CALL_6)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_create_data_~data~0.base_20)))) (exists ((v_create_data_~data~0.base_19 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_create_data_~data~0.base_19)))))))) (let ((.cse1 (bvadd (_ bv4 32) v_append_~node~0.offset_BEFORE_CALL_4))) (or (not (bvule .cse1 (select (store |c_old(#length)| v_create_data_~data~0.base_19 (_ bv8 32)) v_append_~node~0.base_BEFORE_CALL_6))) (not (bvule v_append_~node~0.offset_BEFORE_CALL_4 .cse1)))))))) is different from false [2021-11-07 07:53:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:58,830 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:53:58,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93725171] [2021-11-07 07:53:58,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93725171] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:58,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:58,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 07:53:58,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571383019] [2021-11-07 07:53:58,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:53:58,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:53:58,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:53:58,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=39, Unknown=4, NotChecked=26, Total=90 [2021-11-07 07:53:58,832 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:54:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:08,300 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2021-11-07 07:54:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:54:08,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2021-11-07 07:54:08,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:08,302 INFO L225 Difference]: With dead ends: 125 [2021-11-07 07:54:08,302 INFO L226 Difference]: Without dead ends: 125 [2021-11-07 07:54:08,302 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=41, Invalid=72, Unknown=5, NotChecked=38, Total=156 [2021-11-07 07:54:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-07 07:54:08,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2021-11-07 07:54:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 97 states have internal predecessors, (105), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-07 07:54:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2021-11-07 07:54:08,307 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 20 [2021-11-07 07:54:08,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:08,307 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2021-11-07 07:54:08,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:54:08,308 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2021-11-07 07:54:08,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 07:54:08,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:08,309 INFO L513 BasicCegarLoop]: trace histogram [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 07:54:08,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 07:54:08,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:54:08,518 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:54:08,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:08,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1141335566, now seen corresponding path program 1 times [2021-11-07 07:54:08,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:54:08,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547863459] [2021-11-07 07:54:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:08,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:54:08,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:54:08,522 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:54:08,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 07:54:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:08,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 07:54:08,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:08,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:54:09,070 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 07:54:09,070 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 17 treesize of output 16 [2021-11-07 07:54:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:09,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:54:09,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547863459] [2021-11-07 07:54:09,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547863459] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:54:09,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:54:09,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-07 07:54:09,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463188504] [2021-11-07 07:54:09,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:54:09,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:54:09,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:54:09,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:54:09,094 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 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 07:54:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:09,825 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2021-11-07 07:54:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:54:09,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 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 22 [2021-11-07 07:54:09,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:09,827 INFO L225 Difference]: With dead ends: 143 [2021-11-07 07:54:09,827 INFO L226 Difference]: Without dead ends: 143 [2021-11-07 07:54:09,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:54:09,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-07 07:54:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2021-11-07 07:54:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 97 states have internal predecessors, (105), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-07 07:54:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2021-11-07 07:54:09,832 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 22 [2021-11-07 07:54:09,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:09,833 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2021-11-07 07:54:09,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 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 07:54:09,833 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2021-11-07 07:54:09,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 07:54:09,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:09,834 INFO L513 BasicCegarLoop]: trace histogram [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 07:54:09,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:10,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:54:10,049 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:54:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:10,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1141335565, now seen corresponding path program 1 times [2021-11-07 07:54:10,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:54:10,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128870160] [2021-11-07 07:54:10,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:10,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:54:10,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:54:10,052 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:54:10,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 07:54:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:10,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:54:10,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:10,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:54:10,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 6 [2021-11-07 07:54:10,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 07:54:10,883 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 16 treesize of output 20 [2021-11-07 07:54:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:11,172 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:54:11,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128870160] [2021-11-07 07:54:11,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128870160] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:54:11,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:54:11,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 07:54:11,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371668165] [2021-11-07 07:54:11,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:54:11,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:54:11,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:54:11,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:54:11,174 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 10 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 07:54:11,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:11,847 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2021-11-07 07:54:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:54:11,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 22 [2021-11-07 07:54:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:11,850 INFO L225 Difference]: With dead ends: 106 [2021-11-07 07:54:11,850 INFO L226 Difference]: Without dead ends: 106 [2021-11-07 07:54:11,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:54:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-07 07:54:11,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-11-07 07:54:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 92 states have internal predecessors, (99), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-07 07:54:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2021-11-07 07:54:11,855 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 22 [2021-11-07 07:54:11,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:11,855 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2021-11-07 07:54:11,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 07:54:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2021-11-07 07:54:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 07:54:11,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:11,857 INFO L513 BasicCegarLoop]: trace histogram [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 07:54:11,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:12,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:54:12,066 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting appendErr7REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:54:12,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:12,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1154047171, now seen corresponding path program 1 times [2021-11-07 07:54:12,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:54:12,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862746136] [2021-11-07 07:54:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:12,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:54:12,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:54:12,078 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:54:12,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 07:54:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:12,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:54:12,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:12,746 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:54:12,746 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 30 treesize of output 32 [2021-11-07 07:54:12,761 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 07:54:12,761 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 29 treesize of output 29 [2021-11-07 07:54:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:12,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:54:17,526 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~pointerToList.offset_BEFORE_CALL_6 (_ BitVec 32)) (v_append_~pointerToList.base_BEFORE_CALL_8 (_ BitVec 32))) (or (exists ((v_create_data_~data~0.base_23 (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv4 32) v_append_~pointerToList.offset_BEFORE_CALL_6))) (or (not (bvule v_append_~pointerToList.offset_BEFORE_CALL_6 .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| v_create_data_~data~0.base_23 (_ bv8 32)) v_append_~pointerToList.base_BEFORE_CALL_8))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| v_create_data_~data~0.base_23)))))) (let ((.cse1 (bvadd (_ bv4 32) v_append_~pointerToList.offset_BEFORE_CALL_6))) (and (bvule .cse1 (select |c_#length| v_append_~pointerToList.base_BEFORE_CALL_8)) (bvule v_append_~pointerToList.offset_BEFORE_CALL_6 .cse1))))) is different from false [2021-11-07 07:54:19,544 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_append_~pointerToList.offset_BEFORE_CALL_6 (_ BitVec 32)) (v_append_~pointerToList.base_BEFORE_CALL_8 (_ BitVec 32))) (or (exists ((v_create_data_~data~0.base_23 (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv4 32) v_append_~pointerToList.offset_BEFORE_CALL_6))) (or (not (bvule v_append_~pointerToList.offset_BEFORE_CALL_6 .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| v_create_data_~data~0.base_23 (_ bv8 32)) v_append_~pointerToList.base_BEFORE_CALL_8))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| v_create_data_~data~0.base_23)))))) (let ((.cse1 (bvadd (_ bv4 32) v_append_~pointerToList.offset_BEFORE_CALL_6))) (and (bvule .cse1 (select |c_#length| v_append_~pointerToList.base_BEFORE_CALL_8)) (bvule v_append_~pointerToList.offset_BEFORE_CALL_6 .cse1))))) is different from true [2021-11-07 07:54:23,651 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~pointerToList.offset_BEFORE_CALL_6 (_ BitVec 32)) (v_create_data_~data~0.base_24 (_ BitVec 32)) (v_append_~pointerToList.base_BEFORE_CALL_8 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_create_data_~data~0.base_24)))) (exists ((v_create_data_~data~0.base_23 (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv4 32) v_append_~pointerToList.offset_BEFORE_CALL_6))) (or (not (bvule v_append_~pointerToList.offset_BEFORE_CALL_6 .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| v_create_data_~data~0.base_23 (_ bv8 32)) v_append_~pointerToList.base_BEFORE_CALL_8))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| v_create_data_~data~0.base_23)))))) (let ((.cse1 (bvadd (_ bv4 32) v_append_~pointerToList.offset_BEFORE_CALL_6))) (and (bvule .cse1 (select (store |c_#length| v_create_data_~data~0.base_24 (_ bv8 32)) v_append_~pointerToList.base_BEFORE_CALL_8)) (bvule v_append_~pointerToList.offset_BEFORE_CALL_6 .cse1))))) is different from false [2021-11-07 07:54:23,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 52 treesize of output 48 [2021-11-07 07:54:23,791 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 07:54:23,792 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 48 treesize of output 47 [2021-11-07 07:54:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:23,980 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:54:23,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862746136] [2021-11-07 07:54:23,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862746136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:54:23,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:54:23,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-11-07 07:54:23,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689896845] [2021-11-07 07:54:23,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:54:23,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:54:23,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:54:23,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=145, Unknown=4, NotChecked=50, Total=240 [2021-11-07 07:54:23,982 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:54:26,299 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (= |c_#length| |c_old(#length)|) (forall ((v_append_~pointerToList.offset_BEFORE_CALL_6 (_ BitVec 32)) (v_create_data_~data~0.base_24 (_ BitVec 32)) (v_append_~pointerToList.base_BEFORE_CALL_8 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_create_data_~data~0.base_24)))) (exists ((v_create_data_~data~0.base_23 (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv4 32) v_append_~pointerToList.offset_BEFORE_CALL_6))) (or (not (bvule v_append_~pointerToList.offset_BEFORE_CALL_6 .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| v_create_data_~data~0.base_23 (_ bv8 32)) v_append_~pointerToList.base_BEFORE_CALL_8))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| v_create_data_~data~0.base_23)))))) (let ((.cse1 (bvadd (_ bv4 32) v_append_~pointerToList.offset_BEFORE_CALL_6))) (and (bvule .cse1 (select (store |c_#length| v_create_data_~data~0.base_24 (_ bv8 32)) v_append_~pointerToList.base_BEFORE_CALL_8)) (bvule v_append_~pointerToList.offset_BEFORE_CALL_6 .cse1)))))) is different from false [2021-11-07 07:54:29,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:29,714 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2021-11-07 07:54:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:54:29,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-11-07 07:54:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:29,716 INFO L225 Difference]: With dead ends: 116 [2021-11-07 07:54:29,716 INFO L226 Difference]: Without dead ends: 116 [2021-11-07 07:54:29,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=108, Invalid=319, Unknown=5, NotChecked=120, Total=552 [2021-11-07 07:54:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-07 07:54:29,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 103. [2021-11-07 07:54:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 90 states have internal predecessors, (97), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-07 07:54:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2021-11-07 07:54:29,721 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 22 [2021-11-07 07:54:29,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:29,721 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2021-11-07 07:54:29,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:54:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2021-11-07 07:54:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:54:29,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:29,723 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:29,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 07:54:29,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:54:29,934 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting appendErr1REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-07 07:54:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:29,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1606693903, now seen corresponding path program 1 times [2021-11-07 07:54:29,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:54:29,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012532900] [2021-11-07 07:54:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:29,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:54:29,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:54:29,936 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:54:29,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 07:54:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:30,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:54:30,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:30,675 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:54:30,675 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 29 treesize of output 31 [2021-11-07 07:54:30,690 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 07:54:30,690 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 28 treesize of output 28 [2021-11-07 07:54:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:30,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:54:35,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 55 treesize of output 51 [2021-11-07 07:54:35,373 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 07:54:35,373 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 51 treesize of output 50 [2021-11-07 07:54:36,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 07:54:36,097 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 36 treesize of output 40 [2021-11-07 07:54:36,552 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:54:36,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012532900] [2021-11-07 07:54:36,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [v_append_~node~0.base_26] [2021-11-07 07:54:36,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1456534714] [2021-11-07 07:54:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:36,553 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 07:54:36,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/cvc4 [2021-11-07 07:54:36,554 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 07:54:36,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 07:54:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:37,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:54:37,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:37,038 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 07:54:37,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 7 [2021-11-07 07:54:37,690 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:54:37,690 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 15 treesize of output 17 [2021-11-07 07:54:38,106 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-07 07:54:38,106 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 3 case distinctions, treesize of input 26 treesize of output 31 [2021-11-07 07:54:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:38,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:54:44,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [v_append_~node~0.base_31] [2021-11-07 07:54:44,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389296092] [2021-11-07 07:54:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:44,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:44,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:44,575 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:44,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 07:54:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:54:44,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:45,254 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:54:45,254 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 31 treesize of output 33 [2021-11-07 07:54:45,270 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 07:54:45,270 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 30 treesize of output 30 [2021-11-07 07:54:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:45,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:54:47,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 54 treesize of output 50 [2021-11-07 07:54:47,481 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 07:54:47,481 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 50 treesize of output 49 [2021-11-07 07:54:47,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [v_append_~node~0.base_26] [2021-11-07 07:54:47,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:54:47,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 07:54:47,679 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-11-07 07:54:47,679 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 07:54:47,685 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION [2021-11-07 07:54:47,687 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr0REQUIRES_VIOLATION [2021-11-07 07:54:47,687 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr1REQUIRES_VIOLATION [2021-11-07 07:54:47,687 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr2REQUIRES_VIOLATION [2021-11-07 07:54:47,687 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr3REQUIRES_VIOLATION [2021-11-07 07:54:47,688 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr4ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:54:47,688 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr5ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:54:47,688 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr6ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:54:47,688 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr7ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:54:47,688 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr8ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:54:47,689 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr9ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:54:47,689 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr0REQUIRES_VIOLATION [2021-11-07 07:54:47,689 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr1REQUIRES_VIOLATION [2021-11-07 07:54:47,689 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr2REQUIRES_VIOLATION [2021-11-07 07:54:47,689 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr3REQUIRES_VIOLATION [2021-11-07 07:54:47,689 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr4REQUIRES_VIOLATION [2021-11-07 07:54:47,689 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr5REQUIRES_VIOLATION [2021-11-07 07:54:47,689 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr6REQUIRES_VIOLATION [2021-11-07 07:54:47,689 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr7REQUIRES_VIOLATION [2021-11-07 07:54:47,689 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr8REQUIRES_VIOLATION [2021-11-07 07:54:47,689 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr9REQUIRES_VIOLATION [2021-11-07 07:54:47,690 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-11-07 07:54:47,690 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-07 07:54:47,690 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-11-07 07:54:47,690 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-11-07 07:54:47,690 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-11-07 07:54:47,690 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-11-07 07:54:47,690 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-11-07 07:54:47,690 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-11-07 07:54:47,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-11-07 07:54:47,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-11-07 07:54:47,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-11-07 07:54:47,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-11-07 07:54:47,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:54:47,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:54:47,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:54:47,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-11-07 07:54:47,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-11-07 07:54:47,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17ENSURES_VIOLATIONMEMORY_LEAK [2021-11-07 07:54:47,692 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION [2021-11-07 07:54:47,692 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION [2021-11-07 07:54:47,692 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION [2021-11-07 07:54:47,692 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION [2021-11-07 07:54:47,692 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION [2021-11-07 07:54:47,692 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION [2021-11-07 07:54:47,692 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION [2021-11-07 07:54:47,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:47,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:48,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:48,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt [2021-11-07 07:54:48,296 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:48,299 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 07:54:48,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:54:48 BoogieIcfgContainer [2021-11-07 07:54:48,308 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 07:54:48,309 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 07:54:48,309 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 07:54:48,309 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 07:54:48,310 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:53:09" (3/4) ... [2021-11-07 07:54:48,312 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 07:54:48,313 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 07:54:48,313 INFO L168 Benchmark]: Toolchain (without parser) took 100075.91 ms. Allocated memory was 71.3 MB in the beginning and 96.5 MB in the end (delta: 25.2 MB). Free memory was 51.8 MB in the beginning and 58.9 MB in the end (delta: -7.1 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.1 GB. [2021-11-07 07:54:48,314 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 71.3 MB. Free memory was 52.5 MB in the beginning and 52.5 MB in the end (delta: 54.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:54:48,314 INFO L168 Benchmark]: CACSL2BoogieTranslator took 612.95 ms. Allocated memory is still 71.3 MB. Free memory was 51.5 MB in the beginning and 43.0 MB in the end (delta: 8.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 07:54:48,315 INFO L168 Benchmark]: Boogie Preprocessor took 69.02 ms. Allocated memory is still 71.3 MB. Free memory was 43.0 MB in the beginning and 39.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 07:54:48,315 INFO L168 Benchmark]: RCFGBuilder took 1033.68 ms. Allocated memory is still 71.3 MB. Free memory was 39.6 MB in the beginning and 32.5 MB in the end (delta: 7.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 07:54:48,315 INFO L168 Benchmark]: TraceAbstraction took 98349.92 ms. Allocated memory was 71.3 MB in the beginning and 96.5 MB in the end (delta: 25.2 MB). Free memory was 31.9 MB in the beginning and 59.7 MB in the end (delta: -27.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:54:48,326 INFO L168 Benchmark]: Witness Printer took 3.85 ms. Allocated memory is still 96.5 MB. Free memory was 59.7 MB in the beginning and 58.9 MB in the end (delta: 839.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:54:48,328 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 71.3 MB. Free memory was 52.5 MB in the beginning and 52.5 MB in the end (delta: 54.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 612.95 ms. Allocated memory is still 71.3 MB. Free memory was 51.5 MB in the beginning and 43.0 MB in the end (delta: 8.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 69.02 ms. Allocated memory is still 71.3 MB. Free memory was 43.0 MB in the beginning and 39.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1033.68 ms. Allocated memory is still 71.3 MB. Free memory was 39.6 MB in the beginning and 32.5 MB in the end (delta: 7.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 98349.92 ms. Allocated memory was 71.3 MB in the beginning and 96.5 MB in the end (delta: 25.2 MB). Free memory was 31.9 MB in the beginning and 59.7 MB in the end (delta: -27.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.85 ms. Allocated memory is still 96.5 MB. Free memory was 59.7 MB in the beginning and 58.9 MB in the end (delta: 839.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * 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: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L582] struct node_t *list = ((void *)0); [L583] int dataNotFinished = 0; [L585] CALL append(&list) [L576] struct node_t *node = malloc(sizeof *node); [L577] EXPR \read(**pointerToList) [L577] node->next = *pointerToList [L578] CALL, EXPR create_data() [L550] COND TRUE __VERIFIER_nondet_int() [L551] return ((void *)0); [L578] RET, EXPR create_data() [L578] node->data = create_data() [L579] *pointerToList = node [L585] RET append(&list) [L586] COND TRUE __VERIFIER_nondet_int() [L585] CALL append(&list) [L576] struct node_t *node = malloc(sizeof *node); [L577] \read(**pointerToList) - 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 free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: 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: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 125 locations, 46 error locations. Started 1 CEGAR loops. OverallTime: 98.2s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 41.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1448 SDtfs, 812 SDslu, 2910 SDs, 0 SdLazy, 3160 SolverSat, 145 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 27.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 551 GetRequests, 424 SyntacticMatches, 16 SemanticMatches, 111 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 33.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=15, InterpolantAutomatonStates: 100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 160 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 37.4s InterpolantComputationTime, 292 NumberOfCodeBlocks, 292 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 525 ConstructedInterpolants, 59 QuantifiedInterpolants, 3819 SizeOfPredicates, 49 NumberOfNonLiveVariables, 2038 ConjunctsInSsa, 125 ConjunctsInUnsatCore, 35 InterpolantComputations, 34 PerfectInterpolantSequences, 2/3 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 07:54:48,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390942da-e9dd-43f3-8412-12f67aec777c/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